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Theses

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2010 - 201820
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Subject: Agricultural Entomology × End date: 2018 × Start date: 2010 × Type: Thesis × Thesis Type: M.Sc ×
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Now showing 1 - 9 of 20
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    ThesisItemOpen Access
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    Growth Rates and Economic Analysis of Wheat in Seoni District of Madhya Pradesh
    (jnkvv, jabalpur, 2013) Kokodey, Sarvjaya; Shrivastava, A.
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    ThesisItemOpen Access
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    ThesisItemOpen Access
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    ThesisItemOpen Access
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    ThesisItemOpen Access
    Management of okra shoot and fruit borer (Earias spp.) in agro-ecosystem of rewa district
    (JNKVV, 2016) Shrivastava, Prakhar Kumar; Dhingra, M.R.
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    ThesisItemOpen Access
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    ThesisItemOpen Access
    Studies on insect fauna collected in lght trap during kharif season at jabalpur
    (JNKVV, 2016) Mishra, Yogendra; Sharma, Amit Kumar
    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 25-30% (Dhaliwal and Arora, 2010) and in Madhya Pradesh about 40-100 % losses were observed (Dhamdhere, 1990). Light trap is an important tool for minimizing the insect pests damage without any toxic hazards (Sharma et. al., 2004). Other than this light trap has been used to supplement the knowledge of pest fauna of given locality, geographical distribution and their seasonal activity etc. (Verma and Vaishampayan, 1983 and Sharma et. al., 2010). Light trap is also useful to know the effect the weather factors on species abundance Jonason et al (2014b).. Therefore the present research work on “Studies on insect fauna collected in light trap during kharif season at Jabalpur” was under taken with following objectives. 1. Incidence and identification of insect fauna collected in light trap during kharif season at Jabalpur. 2. Study on seasonal incidence of insect pest species of paddy collected through light trap. For the taxonomic documentation, the light trap was operated every night and collection was observed on the next day morning. Total insect 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 incidence study of insect pest species was done by operating the light trap during kharif season of 2015. A insect pest of paddy and predator & parasite was observed on daily basis. In order to study the seasonal incidence, daily trap catch was converted into weekly total and mean per day per week (weekly mean/day). 1. Incidence and identification of insect fauna collected in light trap during kharif season at jabalpur. Taxonomic analysis revealed that these 62 insect species belonging to 11 orders and 34 families were recorded throughout the season (kharif 2015). Based on number of species collected, largest collection was represented by order Lepidoptera 19 species (30%) followed by order Coleoptera 13 species (21%), Hemiptera 12 species (20%), Orthoptera 5 species (8%) and Hymenoptera 5 species (8%) in descending order respectively. Orders of minor significance are represented by Odonata and Neuroptera having 2 species each while Isoptera, Diptera, Dermaptera and 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 (32 species). (ii) Beneficial insects- as bio-control agents (Predators and parasites) (28 species). (iii) Beneficial insects- as commercially important (2 species). 2. Study on seasonal incidence of insect pest species of paddy collected through light trap. The activity period of Leptocorisa acuta (Thunberg) and Nephotettix virescens (Distant) were observed from August to December with distinct peaks during 41st & 45th SW and 34th, 38th & 42nd SW respectively. All the weather parameters did not show any significant effect on both insect catches.. The activity period of Mythimna separata (Walker) was observed from September to December with higher numbers during 45th SW. The activity period of Cnaphalocrocis medinalis (Guene) was observed from September to October with one distinct peak during 41st SW. Various weather parameters did not show any significant effect on both insect 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.. The activity period of Tetrix subulata Linnaeus was observed from June to December with three distinct peak 32nd SW, 36th SW and 41st SW respectively. Maximum temperature showed a significant positive effect on both insect catches. Euscyrtus concinnus (de Haan) and Gryllotalpa orientalis Burmeister was active from June to December with two distinct peaks during 38th& 40th SW and 37th& 40th SW respectively. Maximum temperature and evaporation showed significant positive effect on both insect catches.
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    ThesisItemOpen Access
    Sucession and population dynamics of insect pest complex of onion and management of thrips
    (JNKVV, 2016) Naresh, Kommireddy; Saxena, A.K.
    Present research work on “succession and population dynamics of insect pest complex of onion and management of thrips” was carried out in the experimental field of Department of Horticulture, JNKVV, Jabalpur, (M.P) during 2015-16. The experiment was conducted with the following objectives 1) To study the succession of insect pest complex on onion 2) To study the population dynamics of major insect pests of onion 3) Management of onion thrips : a) To study the effect of planting dates on thrips incidence b) To study the efficacy of insecticides and NSKE against onion thrips Three different species of insect pests, one non insect pest and one natural enemy order were recorded on the onion crop at experimental field of Department of Horticulture, JNKVV, Jabalpur, (M.P) during rabi 2015-16. Which represented three pest orders viz. Thysanoptera (Family: Thripidae), Lepidoptera (Family: Noctuidae), Tetranychidae (Family: Trombidiformes) and a group of predators namely spiders, Order: Arachnida were also recorded. The thrips appeared when the crop age was about 32 days old and their activity continued till the maturity of the crop. Cutworm appeared after transplanting when the crop age was about 32 days old and their activity continued till the reproductive stage of the crop. Fruit borer also appeared when the crop age was about 37 days old and their activity continued till the reproductive stage of the crop. Red spider mite appeared when the crop age was about 68 days old and their activity continued for a very short period (up to 106th day old crop). The first predation of spiders was observed during the vegetative stage of the crop i.e. about 12 days old crop (after transplanting) and remained available from vegetative stage to harvesting of crop. The thrips T. tabaci Lindeman was first recorded in the first week of December i.e. 2nd December 2015 during the 48th standard week (SW) and remained available up to maturity stage of the crop with The peak activity during 1st SW (i.e. 1st to 7th January). Correlation between various abiotic factors and thrips population showed that maximum temperature was found to be significant positive correlation. Further, minimum temperature, sunshine, morning vapour pressure and evaporation exhibited positive correlation. While morning & evening relative humidity, wind velocity, rainfall, no. of rainy days and evening vapour pressure showed negative correlation with thrips population but statistically found to be non-significant. The activity of cutworm, A. ipsilon Hufnagel was first recorded in the first week of December i.e. 2nd December 2015 during the 48th standard week, with peak activity during 51th SW (i.e. 17th to 23rd December). Correlation between various abiotic factors and cutworm population showed that, morning relative humidity, evening relative humidity, wind velocity was found to be positive correlation. While no. of rainy days and morning vapour pressure were found to be zero correlation. While maximum & minimum temperature, sunshine hour, rainfall, evening vapour pressure and evaporation showed negative correlation with leaves infested by cutworm but statistically found to be non significant. The Fruit borer, H. armigera Hubner was first recorded in the second week of December (i.e. 7th December 49th SW), with peak activity during 2nd SW (i.e. 8th to 14th January). Correlation studies revealed that maximum temperature, sunshine hours and evaporation showed positive correlation. Further, minimum temperature, morning and evening relative humidity, wind velocity, rainfall, no. of rainy days, morning and evening vapour pressure showed negative correlation with fruit borer population but statistically found to be non-significant. The Red spider mite, T. telarius Linnaeus was first recorded in the first week of January (i.e. 7th January, 1st SW), with peak activity during 5th SW (i.e. 29th January to 4th February). Correlation studies revealed that, morning relative humidity, and sunshine showed positive correlation. While maximum temperature, minimum temperature, evening relative humidity, wind velocity, rain fall and no. of rainy days, morning & evening vapour pressure and evaporation showed negative correlation with red spider mite population but statistically were found non significant. The various molecule evaluated in which Imidacloprid 17.8% SL @ 29.37 ml a.i./ha was found to be significantly lowest thrips population than all other treatments but at par with Triazophos 40% EC @ 400 ml a.i./ha. Plots treated with Triazophos recorded significantly lower thrips population than other treatments except Profenophos 50% EC @ 500 ml a.i./ha. Against onion thrips, Thrips tabaci L. were found significantly more effective on onion , Allium cepa Linnaeus during rabi 2015. Among the different date of transplanting evaluated, significantly highest population of thrips was recorded in D8 (December 15th) date of transplanting. The lowest thrips population was recorded in D2 (September 15th) date of transplanting. The peak mean thrips population was recorded in the 4th week of March and lowest mean thrips population in fourth week of September. Evaluation of Insecticide effect on population of thrips in the subplot (protected, Imidacloprid 17.8% SL @ 29.37 ml a.i./ha) revealed that significantly more effective against onion thrips, Thrips tabaci L., on onion, Allium cepa Linnaeus during 2015. Interaction of the two factors i.e. planting dates and protected plot have a significant impact on the population of thrips. Among the different date of transplanting and protected plot evaluated, significantly highest population of thrips was recorded interaction (D4 x B1) i.e October 15th date of transplanting and protected plot. The lowest Thrips population was recorded in interaction (D2 x B1) i.e September 15th date of transplanting and protected plot was found significantly. Interaction of the two factors i.e. planting dates and unprotected plot have a significant impact on the population of thrips. Among the different date of transplanting and unprotected plot evaluated, significantly highest population of thrips was recorded interaction (D8 x B2) i.e December 15th date of transplanting and unprotected plot, but at par with interaction (D7 x B2) i.e December 1st date of transplanting and unprotected plot. The lowest Thrips population (5.68 thrips/plant) was recorded in interaction (D1 x B2) i.e September 1st date of transplanting and un protected plot, but at par with interaction (D2 x B2) i.e September 15th date of transplanting and un protected plot.