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Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur

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201418
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Subject: Entomology × End date: 2014 × Start date: 2014 × Type: Thesis ×
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    ThesisItemOpen Access
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    Integrated management of gundhi bug, (Leptocorisa varicornis fabr.) in rice crop (Oryza sativa L.) under rewa condition
    (JNKVV, 2014) Chouhan, Mahendra Singh; Dhingra, M.R.
    Abstract Rice is a monocotyledonous cop, belongs to the Family Poaceae (Graminae) and genus Oryza. It has two cultivated & 22 wild species. Oryza sativa and Oryza glaberrima are the cultivated species of rice. Oryza sativa is globally cultivated species, while Oryza glaberrima is cultivated in West Africa. The crop is grown under different agro climate conditions and production systems. But, the most common practice is the transplanting method in puddled condition. It is an staple crop which is cultivated in diverse agro ecosystem in India and abroad. This crop occupies a key position in Indian Agriculture. About 60 to 65 % of the population at global & national level depends upon rice as a primary source of energy. Rice is cultivated mainly in Asian countries viz. India, China, Japan, Srilanka, Pakistan, Bangladesh etc. and more than 90 percent of the rice produce is consumed in these countries. The total area under the rice cultivation in the world is about 153.9 million ha, and the production is about 618 million tones. Amongst the rice producing countries, India occupies the first position with regard to the area (44.3 million ha), followed by China (29.3 million ha.). So far productivity is concerned, India occupies 15th rank in the World with a productivity of 3.01 tone/ha (FAO 2006). Since the India is far behind in term of productivity is comparison to many national and International level. Various factors has been attributed for low productivity in the country, But among them the cause of low productivity of the crop in our country are various. Biotic stress i.e. Insect pests, diseases and weeds, are the main constraint. Among the biotic stress, insect pests are major factors for low yield, More than 100 pests have been recorded on this crop, which attack the crop right from germination to harvesting. There are a dozen pests which are recognized as a key or major pest of rice. Among the infesting insects, there is a group of sucking pest which is cause havoc sometime in various region of the country. Brown plant hopper (Nilaparvata lugens, Stal.), White backed plant hopper (Sogatella frucifera, Horvath), Green leaf hoper (Nephotettix nigropictus, Stal.) and Gundhi bug (Leptocorisa varicornis Fabr.)] are the well known pests in different part of country as well as in Madhya Pradesh from the group. Rewa is situated in the north-eastern part of Madhya Pradesh at latitude 24º31' N, longitude 81º15' E and altitude of 306.06 m above the mean sea level. The region falls under subtropical climate with extreme winter and summers seasons. The agro climatic condition of Rewa is suitable for rice–wheat cultivation. The annual average rainfall varied from 1100 to 1200 mm. with humidity ranging between 71 to 89 % which is suitable more or less for the development all kind of rice pests, but most suitable for the sucking pests, who are the responsible for stunted growth to complete wilting or drying up of the crop besides as acting vector of disease like yellow mosaic & Tungro dieses etc. Gundhi bug (Leptocorisa varicornis Fabr.) is also one of them which is responsible for crop damage at vegetative and reproductive stage particularly at milky stage. It causes heavy losses from (68.7 to 98.7% with an average loss of 19.8%) in Madhya Pradesh. The severity of this pest has also been reported from Rewa district and need plant protection measures to save the crop, particularly by the ecofriendly approaches. The perusal of literature reveals that the studies so fare conducted for the management of this pests, shows the missing of important aspects like effect of sowing/planting time and varieties & evaluation of cultivar/variety at local level besides testing of new molecules Keeping these facts in view, the present study had been undertaken with the following objective. Objectives – 1. To identify the resistant genotype of rice against Gundhi bug. 2. To study the effect of planting dates on the incidence of Gundhi bug 3. To study the efficacy of new insecticides against Gundhi bug. Summary: Rice is an staple crop which is cultivated in diverse agro ecosystem in India and abroad. This crop occupies a key position in Indian Agriculture. About 60 to 65 % of the population at global & national level depends upon rice as a primary source of energy. It is cultivated mainly in Asian countries viz. India, China, Japan, Srilanka, Pakistan, Bangladesh etc. and more than 90 percent of the rice produce is consumed in these countries. The total area under the rice cultivation in the world is about 153.9 million ha, and the production is about 618 million tones. Amongst the rice producing countries, India occupies the first position with regard to the area (44.3 million ha), followed by China (29.3 million ha.). So far productivity is concerned, India occupies 15th rank in the World with a productivity of 3.01 tone/ha (FAO 2006). There are a dozen pests which are recognized as a key or major pest of rice. Among the infesting insects, there is a group of sucking pest which is cause havoc sometime in various region of the country. Brown plant hopper (Nilaparvata lugens, Stal.), White backed plant hopper (Sogatella frucifera, Horvath), Green leaf hoper (Nephotettix nigropictus, Stal.) and Gundhi bug (Leptocorisa varicornis Fabr.) are the well known pests in different part of country as well as in Madhya Pradesh and Rewa condition. It is one of the major insect pests responsible for poor yield of rice. Hence, to manage the pest, ecofriendly ; studies were conducted to find out the tolerant/resistant cultivar/varieties, of rice suitable time of planting for the Rewa condition and new safer molecules of insecticide. The finding of the objective based, studies has been summarized below- Screening of different paddy cultivar against Rice gundhi bug. Among the 55 screened cultivars CR 2711-76 was found least infested cultivar with 10% percent grain damage. There were 3 more cultivars i.e. Suraksha (12), CB-10-504 (12%) and CB-09-570 (15%). Which were categorized unde scale 5, 25 cultivars taken under scale -7 with damage ranging between 16-25 percent grain damage and the remaining 22 cultivars were categorized under scale 09 with percent damage more than 40 percent. Effect of planting dates on the incidence of Gundhi bug. Three date of planting i.e. early planting, normal planting and late planting were tried to find. The suitable planting time with less infestation of gundhi bug. It was found that planting time of crop had the influence on gundhi bug population. The bug infestation began 50 days after transplanting in all the treatment but variation in the infestation reflected after 60, 70, 80 and 90 days of transplanting. The higher number of bug population was noted in the late planted crop (30/08/2013) with a significant reduction in yield (14.46 q/ha) as compared to the normal and early planting crop. Efficacy of new insecticides against Gundhi bug. To find out the ecofriendly molecules of insecticides, this experiment was conducted with six insecticides. Two of them with two different doses i.e. Triazophos (@ 750, 1250 ml/ha) and Sulfoxaflor (@ 313, 375 ml/ha). All the tested molecules were found effective in the tested doses as compared to untreated check. The insecticides application brought down the population of gundhi bug to 66.65% after 3 days of application to 91.50% after 10 days of spraying. The Monocrotophos @1390 ml/ha proved superior over all tested insecticide with population reduction to the extent of 91.50% followed by Triazophos @ 750 ml/ha and Coragen @ 150 ml/ha proved least effective (66.65%) among insecticides but keeping in view their nature and mode of action it can be used in rice ecosystem for the IPM practice, which allow the some population to survive for the consumption of natural enemies. However, their time of application need further research. The order of field efficacy of tested insecticides at their normal and variable doses given below- Rynaxypyr(T6) < Sulfoxaflor(T4) < Triazophos(T1) < Buprofezin(T5)
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    ThesisItemOpen Access
    Study on seasonal incidence of insect pest complex of tomato (Solanum lycopersicum L.) and their management with phyto extracts
    (JNKVV, 2014) Mandloi, Rishikesh; Pachori, Rajesh
    ABSTRACT The present investigation entitled “Study on seasonal incidence of insect pest complex of tomato (Solanum lycopersicum L.) and their management with phyto extracts” was carried out at Vegetable Research Farm, Department of Horticulture, College of Agriculture, Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur (M.P.) during the rabi 2012-13. The experiment was laid out in two sets, first set to record the seasonal incidence and second set to test the bio efficacy of phyto extracts. The second set of experiment was laid out in Randomized Block Design (RBD) with three replications and eleven treatments for testing the efficacy of phyto extracts. The treatments included NSKE (2%) and (5%), tobacco extract (2%) and (5%), lantana extract (5%), garlic extract (5%), ginger fresh tuber extract (5%), green chilli extract (5%), ipomoea leaf extract (5%), custard apple leaf extract (5%) and control. During the course of study from October 2012 to March 2013, Aphid (Aphis gossypii Glover), Jassid (Amrasca devastans Ishida), White fly (Bemisia tabaci Genn.), Leaf miner (Liriomyza trifolii Burgess), Thrips (Scirtothrips dorsolis) and Fruit borer (Helicoverpa armigera Hub.) were infesting the tomato crop. A. gossypii and L. trifolii were appeared on the tomato crop on 22nd October 2012, while, B. tabaci were appeared in 5 to 11 November 2012 and peak during 26 Feb. to 4 March 2013. A. devastans, S. dorsolis and H. armigera were another major insect pests of tomato crops and it appeared on 5th, 12th and 26th November 2012, respectively. The peak activity of A. gossypii, A. devastans, L. trifolii, and H. armigera was recorded during 12th to 18th March 2013, 26th Feb. to 4th March 2013, 12th to 18th March 2013, and 19th to 25th March 2013, respectively. While B. tabaci population was highest in the 26th Feb to 4th March 2013. S. dorsolis population is seen from 12th November 2012 to 12th March 2013. The seasonal incidence highest mean 11.66 /6 leaves, 9.26/6 leaves, 11.85/10 cm twig, 45.95 per cent, 2.08/6 leaves and 6.11 larval population/plant, were recorded by A. gossypii, A. devastans, B. tabaci, L. trifolii, S. dorsolis and H. armigera, respectively and considered as pests of tomato. S. dorsolis population was significantly and positive correlation with relative humidity evening (0.456) and fruit borer in rainy days (0.428). On the basis of overall lowest mean percentage of leaf infestation 10.70 per cent of L. trifolii recorded in the plots treated with NSKE (5%) followed by tobacco extract (5%) 11.77 per cent and NSKE (2%) 22.09 per cent. However, treatments, NSKE (5%), tobacco extract (5%) and NSKE (2%) were observed significantly less 2.11, 2.62 and 4.52 flies/10 cm twig B. tabaci population, respectively as compared to rest of the treatments. Treatments, NSKE (5%), tobacco extract (5%) and NSKE (2%) were observed significantly less 1.60, 2.07 and 3.21 A. devastans populations per six leaves, respectively and NSKE (5%) and tobacco extract (5%) were also observed significantly less 2.84 and 3.67 per six leaves A. gossypii population, respectively. The treatments, NSKE (5%) and tobacco extract (5%) were observed significantly less larval population of H. armigera 1.21 and 1.57 larvae/plant, respectively. The average less percentage of fruit damaged (6.71 % and 10.97 %) and less percentage yield loss (20.38 and 23.25 %) were recorded in NSKE (5%) and tobacco extract (5%) treatments and considered the most effective treatments against H. armigera. On the basis of above results, NSKE (5%) and tobacco extract (5%) were most effective treatments against L. trifolii, B. tabaci, A. devastans, A. gossypii and H. armigera. NSKE (2%) (16.99 %) and tobacco extract (2%) (17.84%) were found moderately effective than other treatments in respect of less percentage of damaged fruits. Treatment, NSKE (5%) was recorded significantly highest fruit yield 147.50 q/ha. Followed by tobacco extract (5%) (135.57 q/ha.) than rest of the treatments. On the basis of overall performance and economics of these different phyto extracts, NSKE (5%) and tobacco extract (5%) were most effective treatments against the major insect pests of tomato. NSKE (5%) & tobacco extract (5%) gave highest net return (Rs. 47915 and 42700/ ha.) with cost benefit ratio of 1: 3.70 and 1:3.50, respectively.
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    ThesisItemOpen Access
    Studies on insect pest complex of brinjal solanum melongene (Linn.) and their control with insecticides and biopesticides
    (JNKVV, 2014) Patel, Satyendra; Saxena, A.K.
    ABSTRACT Present research work on “Studies on insect pest complex of brinjal, Solanum melongena (Linn.) and their control” was carried out in the experimental fields of Department Of Entomology, Live Stock Farm, Adhartal JNKVV, Jabalpur (M.P.) during rabi season 2012-13. The experiment was conducted with the following objectives : 1. To study the succession of insect complex on brinjal 2. To study the population dynamics of major insects of brinjal 3. Control : (a) To study the efficacy of insecticides against major insect pest complex of brinjal (b) To study the efficacy of biopesticides against major insect pest complex of brinjal 1. Studies on insect pest complex and their natural enemies revealed that the following insect pests were the major pests which were observed infesting the brinjal crop. Jassid, Amrasca biguttula biguttula (Ishida) (Hemiptera: Jassidae); aphid, Aphis gossypii (Glover) (Hemiptera: Aphididae); whitefly, Bemisia tabaci (Genn.) (Hemiptera: Aleyrodidae), thrips, Thrips tabaci (Lederman) (Thysonoptera: Thripidae) and shoot and fruit borer, Leucinodes orbonalis (Guen.) (Lepidoptera : Pyraustidae) as major pests infesting brinjal crop and one natural enemy lady bird beetle Menochilus sexmaculatus (Fabricius) (Coleoptera: Coccinellidae). Among them, jassid, aphid, thrips whitefly were appeared when the crop age was about 26 days old i.e. during vegetative stage among them jassid and whitefly remained active upto maturity stage of the crop and aphid and thrips remained active upto fruiting stage of the crop. and was the next natural enemy lady bird beetle, Menochilus sexmaculatus (Fabricius) were appeared when crop age was about 53 days old i.e. during vegetative stage and remained active upto maturity stage of the crop. Shoot and fruit borer appeared when the crop age was about 118 days old i.e.during reproductive stage of the crop and remained active up to maturity of the crop. The incidence of shoot and fruit borer not observed on shoot at vegetative stage. Jassids was first recorded in 10th December 2012 i.e. during the 50th SW (10-11-2012 to 16-11-2012) and active upto last week of April.The peak activity of the pest was observed during 16th to 21st SW (i.e. mid week of April to last week of May). The peak activity of the pest was observed (4.27 jassid/6 leaves) during 12th SW (19-03-2013 to 25-03-2013). During this period maximum and minimum temperature was 33.4. and 16.20C respectively, whereas morning and evening relative humidity was 77.0 and 28.0 percent respectively. Further sunshine, wind speed, morning and evening vapour pressure and evaporation were 8.2 hrs, 3.6 km/hr, 12.6 mm, 10.6 mm and 4.5 mm respectively .There was no rainfall during this week. Correlation studies between various abiotic factors and jassid population revealed that morning and evening relative humidity, showed significant positive correlation. Aphid was first recorded in 10th December 2012 i.e. during the 50th SW (10-11-2012 to 16-11-2012). In the present study the activity of the pest continued from 2nd week of Deceber to last week March. The peak activity of the pest was observed during 9th SW (Last week of February to First week of March). During this period maximum and minimum temperature was 280c and 9.20C respectively, whereas morning and evening relative humidity was 87.0 and 37.0 percent respectively. Further sunshine, wind speed, morning and evening vapour pressure and evaporation were 9.8 hrs, 3.1 km/hr, 9.3 mm, 10.6 mm and 3.6 mm respectively. Correlation studies between various abiotic factors and aphid population revealed that morning and evening relative humidity and evening vapour pressure showed significant positive correlation. White fly was first recorded in 10th December 2012 i.e. during the 50th SW (10-11-2012 to 16-11-2012). In the present study the activity of the pest continued from 2nd week of Deceber to last week of April. The peak activity of the pest was observed during 10th SW (first week of March to 2nd week of march). During this period the maximum and minimum temperature was 30.7 and 9.9 00C respectively, whereas morning and evening relative humidity was 83.0 and 28.0 percent respectively. Further sunshine, wind speed, morning and evening vapour pressure and evaporation were 9.6 hrs, 2.6 km/hr, 9.0 mm, 9.2 mm and 4.1 mm respectively. There was 0.00 mm rainfall during this week and no rainy days. Correlation studies between various abiotic factors and whitefly population revealed that that morning and evening relative humidity and evening vapour pressure showed significant positive correlation with whitefly population. Thrips was first recorded in 10th December 2012 i.e. during the 50th SW (10-11-2012 to 16-11-2012). In the present study the activity of the pest continued from 2nd week of Deceber to last week of March. The peak activity of the pest was observed during 7th SW (2nd week of february to 3rd week of February). During this period maximum and minimum temperature was 25.2 and 13.00C respectively, whereas morning and evening relative humidity was 91.0 and 60.0 percent respectively. Further sunshine, wind speed, morning and evening vapour pressure and evaporation were 4.1 hrs, 4.4 km/hr, 11.5 mm, 12.7 mm and 3.1 mm respectively. There was 55.4 mm rainfall during this week and 3 rainy days. Correlation studies between various abiotic factors and whitefly population revealed that Correlation studies revealed that rainfall showed significant positive correlation with thrips population. During the entire period of study the shoot damage due to shoot and fruit borer was not observed. Fruit infestation due to shoot and fruit borer was first recorded in the first week of April i.e. 12th March (11th SW). In the present study the activity of the pest continued from 2nd week of March to last week of April i.e. from reproductive to maturity stage. The peak activity of the pest was observed during in the 16th SW (3rd week of April to 4th week of April). During this period maximum and minimum temperature was 36.50 and 20.100C, respectively, whereas morning and evening relative humidity were 51 and 22 percent, respectively. Further sunshine, wind speed, morning and evening vapour pressure and evaporation were 8.6 hrs, 5.2 km/hr., 11.3 mm, 8.8 mm and 6.9 mm, respectively. There was rainfall 10.60 mm and 1.0 rainy day during this week. Correlation studies between various abiotic factors and whitefly population revealed that minimum temperature and sunshine hrs. showed significant positive correlation. Lady bird beetle was first recorded in 8th January 2013 i.e. during the 2th (SW). In the present study the activity of the pest continued from 2nd week of January to last week April. The peak activity of the pest was observed during 12th SW (19-03-2013 to 25-03-2013). During this period maximum and minimum temperatures were 33.4 and 16.20C respectively, whereas morning and evening relative humidity were 66.0 and 30.0 percent respectively. Further sunshine, wind speed, morning and evening vapour pressure and evaporation were 8.2 hrs, 3.6 km/hr, 9.1, 12.6 and 10.6 mm respectively. There was no rainfall during this week. Correlation studies revealed that maximum and minimum temperature, wind speed, sunshine, rainfall, rainy days, morning vapour pressure, evening vapour pressure and evaporation exhibited positive correlation with beetle (grub and adult) per plant but statistically found to be non significant. Further, morning and evening relative humidity exhibited negative correlation with beetle (grub and adult) per plant, but statistically found to be non significant. On the basis of the efficacy of different insecticidal treatments against pest complex, Emamectin benzoate @ 10 g.a.i/ha was found to be most effective as it recorded lowest infestation, of all the recorded pests followed by Pyriproxifen + fenpropethrin 500 ml/ha Highest fruit yield was registered in Emamectin Benzoate @10 g.a.i/ha (120.66 q / ha), followed by Pyriproxifen + fenpropethrin 500 ml/ha (115.47 q / ha) as compared to control (60.07 q / ha). On the basis of the efficacy of different biopesticides treatments Passilomyces fumosoresus @ 1l/ha was found to be the most effective as it recorded lowest infestation, of all recorded pests followed by Beauveria bassiana @ 1l/ha. Highest fruit yield was registered in Passilomyces fumosoresus @ 1l/ha (85.06 q / ha), followed by Beauveria bassiana @ 1l/ha (80.05/ ha).
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    ThesisItemOpen Access
    Screening of hickpea genotypes against gram pod borer (Helicoverpa armigera hubner)
    (JNKVV, 2014) Birle, Lokendra; Shukla, A.
    ABSTRACT Bengal gram or chickpea (Cicer arietinum) is one of the important pulse crops and is a popular dietary supplement consumed all over the world. Pulses have high protein content and are capable of fixing atmospheric nitrogen. Chickpea crop suffers due to the losses caused by various insect pests and diseases. It is attacked by eleven species of insect pests. Among these pests, the pod borer, Helicoverpa armigera (Hubner) (Lepidoptera: Noctuidae) is the most serious insect pest in most of the chickpea growing areas of the world. It damages leaves flowers and pods at different stages of growth and yield losses of 50 per cent or even more, have been recorded due to the incidence of this pest. Several control measures, especially chemical insecticides, are applied to control this pest. Chemical means of plant protection causes several adverse effects like environment-pollution, pest resurgence, development of resistance in pests against insecticides, etc. To avoid these problems, non-chemical pest control measures need to be promoted. Development and searching of resistant plant material is one of such methods. The use of resistant genotypes is considered as simple, easy, cheap and ideal method of combating pest problems. From farmers' point of view, this can be the most acceptable form of pest control technique. In the past several scientists have made efforts to screen germplasms / genotypes to find resistant sources. A common limitation is that most of the pest resistant varieties are not high yielding. Breeders are trying to develop high yielding and fusarium wilt resistant lines of chickpea with resistance to pod borer (Lateef et al., 1986). Totally resistant and high yielding genotypes of chickpea to pod borer are not currently ready for farmers' use, but are likely to become available in near future. It is necessary to develop genotypes with stable resistance against Helicoverpa armigera (Hubner) across the agro-ecological zones of India.Hence, the present experiment entitled, "Screening of chickpea (Cicer arietinum L.) genotypes for resistance against gram pod borer, Helicoverma armigera (Hubner)” was planned with following objectives: 1. Screening of different genotypes of chickpea against Helicoverpa armigera. 2. Characterization of different chickpea genotypes and correlation of Helicoverpa incidence with morphological characters. The experiment was conducted in Randomized Block Design with three replications and 40 genotypes. Recommended agronomical practices were adopted, to raise good crop. Larval population of Helicoverpa armigera on different genotypes was recorded once in every standard meteorological week (SMW). Sample unit was 0.5 m 2 cropped area and two such sample were observed in each treatment and replication.Observations on total number of pods (healthy and damaged) were recorded on 3 randomly selected plants in every plot. Seed yield from each plot was recorded at harvest. The larval population observed in different genotypes was subjected to analysis of variance at 5% level of significance. . 1. Screening of different genotypes of chickpea against Helicoverpa armigera Chickpea genotypes namely C-410, C-426, C-424 and C-415 registered lowest population (0.10, 0.23, 0.27, and 0.28, larva) of H.armigera followed by genotypes C-409, C-417 and C-416 that registered mean population of 0.32 larva/0.5 m2. However population of remaining 33 genotypes was found to be at par. Highest mean population was recorded in genotypes namely C-306, C-419, C-324, C-321 and JG-14 (between 0.55 to 0.68 larvae/0.5m2). 2. Characterization of different chickpea genotypes and correlation of Helicoverpa incidence with morphological characters. Major plant characters of chickpea genotypes i.e.plant height, days to 50% flowering, pod bearing, pod damage and days to maturity were recorded. Plant height and days to maturity exhibited a significant positive correlation with the incidence level of H.armigera. With every unit increase in plant height(cm) there was an increase of 0.009 larva of H. armigera in chickpea field and every unit increase in day to maturity there was an increase of 0.022 larva of H. armigera in chickpea field.
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    ThesisItemOpen Access
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    Study on insect pest fauna of paddy ecosystem collected in light trap in jabalpur region
    (JNKVV, 2014) Muchhala, Yogesh; Sharma, Amit Kumar
    ABSTRACT Rice (Oryza sativa L.) is an important cereal crop in the world provides a staple food for nearly half of the global population. Over 100 insect pest species attack paddy crop at various stages of its growth of which 20 species cause the economic damage (Pathak & Dhaliwal, 1981). In India average losses in paddy production due to insect pests are 25% during 2007-08 (Dhaliwal and Arora, 2010) and in Madhya Pradesh about 40-100 % losses were observed (Dhamdhere, 1990). Light trap plays an important role in monitoring and management of insect pests population in Agro-ecosystem (Kant and Kanaujia, 2007). The forecasting and predication of insect occurrence or outbreak can be made by using light trap (Singh et al., 2007). Light trap is an important tool for minimizing the insect pests damage without any toxic hazards (Sharma et al., 2004). Therefore the present research work on “Study on insect pest fauna of Paddy ecosystem collected in light trap in Jabalpur region” was under taken with following objectives. 1. Taxonomic documentation of total insect pest fauna of paddy ecosystem collected in light trap in Jabalpur region. 2. Study on seasonal activity of major insect pest species of paddy collected in light trap in relation to weather parameters. 3. Study on seasonal activity of major predatory and parasitic insects collected in light trap in relation to weather parameters. For the taxonomic documentation, the light trap was operated every night but collection of three alternate da ys per week was observed. Total insect pest fauna was observed and sorted out on the basis of 3 major categories of economic importance:- I) Harmful insects- as crop pests. II) Beneficial insects- as bio-control agents (Predators and parasites). III) Beneficial insects- as commercially important. Seasonal activity study of major insect pest species was done by operating the light trap in kharif season of 2013. A major pest of paddy and predator & parasite was observed on daily basis. In order to study the seasonal activity, daily trap catch was converted into weekly total and mean per day per week (weekly mean/day). 1. Taxonomic documentation of total insect pest fauna of paddy ecosystem collected in light trap in Jabalpur region. Taxonomic analysis revealed that 69 species belonging to 11 orders and 37 families were recorded throughout the season (kharif 2013). Based on number of species collected, largest collection was represented by order Lepidoptera (20 species) followed by orders Hemiptera (15 species), Coleoptera (15 species), Orthoptera (6 species) & Hymenoptera (5 species) in descending order respectively. Orders of minor significance are represented by Odonata and Neuroptera having 2 species each while Isoptera, Diptera, Dermaptera & Dictyoptera were represented by one species only. These species were grouped on the basis of their economic role in three categories namely (i) Harmful insects- as crop pests (38 species). (ii) Beneficial insects- as bio-control agents (Predators and parasites) (29 species). (iii) Beneficial insects- as commercially important (2 species). 2. Study on seasonal activity of major insect pests species of paddy collected in light trap in relation to weather parameters. The activity period of Leptocorisa acuta (Thunberg) and Nephotettix virescens (Distant) were observed from August to December with distinct peaks during 39th & 42nd SW and 37th, 39th & 42nd SW respectively. Maximum temperature exhibited significant positive effect on both insect catches. The activity period of Mythimna separata (Walker) was observed from September to November with two distinct peaks during 39th and 44rth SW. Maximum temperature and evaporation showed significant positive effect on moth catches. The activity period of Cnaphalocrocis medinalis (Guene) was active from September to October. All the weather parameters did not showe any significant effect on moth catches. The activity period of Melanitis leda ismene Cramer was observed from August to December with three distinct peaks during 38rth, 42nd and 44rth SW respectively. Maximum temperature exhibited significant positive effect on butterfly catches. The activity period of Tetrix subulata Linnaeus was observed from June to November with one distinct peak during 39th SW. Sun shine showed significant positive effect on grass hopper catches, while wind velocity & number of rainy days showed significant negative effect on hoppers catches. Euscyrtus concinnus (de Haan) was active from June to November three distinct peaks during 28rth, 33rd and 37th SW respectively. Minimum temperature, wind velocity, evening relative humidity, morning vapor pressure, evening vapor pressure, evaporation and number of rainy days showed significant positive effect on field cricket catches. However sun shine exhibited significant negative effect on field cricket catches. The activity period of Gryllotalpa orientalis Burmeister was observed from June to December with two distinct peaks during 37th and 42nd SW. Maximum temperature exhibited significant positive effect on mole cricket catches. 3. Study on seasonal activity of major predatory and parasitic insects collected in light trap in relation to weather parameters. The activity period of predatory tiger beetle, Prothyma sp. was observed from July to October with three distinct peaks during 28rth, 37th and 41st SW respectively. Maximum temperature showed a significant positive effect on tiger beetle catches. Coenagrion sp. was active from June to October with two distinct peaks during 37th and 39th SW. Morning relative humidity exhibited significant positive effect on adult damselfly catches. Sirthenea carinata (Fabricius) was active from August to November with two distinct peaks during 36th and 39th SW. Maximum temperature, minimum temperature, evening relative humidity, rainfall, morning vapor pressure, evening vapor pressure and evaporation showed significant positive effect on S. carinata catches. The activity period of Myrmicaria brunnea Saunders was observed from July to August and Enicospilus purgatus (Say) was active from June to November with distinct peak in 30th SW and 27th & 42nd SW respectively. All the weather parameters did not showe any significant effect on catches of both wasps.