Thumbnail Image

Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur

Browse

201510
Reset filters
Subject: Entomology × End date: 2015 × Start date: 2015 × Thesis Type: M.Sc ×
Reset filters

Search Results

Now showing 1 - 9 of 10
  • Thumbnail Image
    ThesisItemOpen Access
  • Thumbnail Image
    ThesisItemOpen Access
  • Thumbnail Image
    ThesisItemOpen Access
  • Thumbnail Image
    ThesisItemOpen Access
  • Thumbnail Image
    ThesisItemOpen Access
    Evaluation of soybean genotypes/varieties and insect growth regulators against major defoliators
    (JNKVV, 2015) Azmi, Aftarika; Shrivastava, S.K.
    ABSTRACT Present investigation on ‘Evaluation of soybean genotypes/varieties and insect growth regulators against major defoliators was carried out with the objectives of screening of soybean genotypes/varieties against major defoliators, and testing the bio- efficacy of insect growth regulators and entomopathogenic microbials against Spodoptera litura (Fabricius) and Spilarctia obliqua (Walker). In laboratory screening, genotypes JS 97-52, JS 20-114, JS 20-122, JS 20-29, JS 93-05, JS 20-112, JS 20-111, JS 20-108, JS 20-103 and JS 20-116 registered significantly higher larval mortality and may be considered as less susceptible against Spodoptera litura. Larval period was shortest on genotype JS 20-122 followed by genotypes JS 20-102, JS 20-34 and JS 97- 52. Pupal mortality was highest on genotype JS 20-122, followed by genotype JS 97-52 that were less susceptible against Spodoptera litura. Bioefficacy of insect growth regulators and entomopathogenic microbials was evaluated against Spodoptera litura and Spilarctia obliqua. Insect growth regulators and bio agents tested under laboratory condition included Novaluron 10% EC (0.5 and 0.25ml/l), Novaluron 8.8% SC (1, 0.5 and 0.25 ml/l), Novaluron + Indoxacarb 4.4 SL (1.25, 1.5, 1.0, 0.75, 0.5 and 0.25 ml/l), Beauveria bassiana* and Metarhizium anisopliae* (*not against Spodoptera litura). Findings reveal that all six doses of Insect Growth Regulator (IGRs), Novaluron + Indoxacarb 4.5 SC (0.25, 0.5, 0.75, 1.0, 1.25 and 1.5 ml/l) were significantly effective against 3rd instar larvae of Spodoptera litura recording 100% larval mortality at 3 days after treatment followed by Novaluron 10% EC that caused 100% mortality at both the doses (0.25 ml/l and 0.5 ml/l) at 5 days after treatments. Novaluron 8.8% SC caused 86.67% and 73.34% larval mortality at 0.25 ml/l and 0.5 ml/l, respectively at 7 days after treatment. Ten days after treatment cent per cent larval mortality was observed in all the treatments except untreated control (23.34% larval mortality). Novaluron + Indoxacarb 4.5 SC 0.25, 0.5, 1.0, 1.5 and 1.25 ml/l caused significantly higher mortality of Spilarctia obliqua larvae at 5 days after treatment. All three doses of Novaluron + Indoxacarb 4.5 SC caused significantly higher mortality. At 7 days after treatment cent percent larval mortality was observed in all the treatments except untreated control that had 23.34% larval mortality.
  • Thumbnail Image
    ThesisItemOpen Access
    Studies on mass production of beauveria bassiana, its bioefficacy and compatibility with some neem derivatives against helicoverpa armigera (Hubner) infesting chickpea (Cicer arietinum linn.)
    (JNKVV, 2015) Kankale, Mayur Diliprao; Das, S.B.
    Studies on mass production of beauveria bassiana, its bioefficacy and compatibility with some neem derivatives against helicoverpa armigera (Hubner) infesting chickpea (Cicer arietinum linn.)
  • Thumbnail Image
    ThesisItemOpen Access
    Study on insect pest complex of chilli and their management
    (JNKVV, 2015) Pandey, Anubhuti; Pachori, R.
    The present investigation entitled, Study on Insect pest complex of chilli and their management was carried out in the experimental field of Department of Entomology, Livestock Farm, Adhartal, JNKVV, Jabalpur M.P. during rabi 2013-14. The experiment was conducted in the following three objectives i. To study the succession of insect pests on chilli crop. ii. To study the population dynamics of insect pests on chilli crop. iii. Comparative performance of foliar application of chemicals for the management of insect - pests. Studies on insect pest complex revealed that the following three major insect pests were damaging chilli crop viz., Aphis gossypii (Glover) [Hemiptera, Aphididae,] Scirtothrips dorsalis (Hood) [Thysanoptera, Thripidae] and Helicoverpa armigera (Hubner) [Lepidoptera, Noctuidae]. First appearances of aphids were observed when the crop was about 39 days after transplanting i.e. vegetative stage and remained active upto the third week of February i.e. the vegetative stage of the crop. First appearance of chilli thrips were observed when the crop was about 109 days after transplanting i.e. vegetative stage and remained active upto the fourth week of May i.e. the maturity stage of the crop. First appearance of chilli fruit borer larvae was observed when the crop was about 114 days after transplanting i.e. the maturity stage and remained active up to the fourth week of May i.e. maturity stage of the crop. The aphids appeared from 5th January 2014 i.e. during the 1 st SW (01- 01-2014 to 07-01-2014) and was available upto the 7th SW (12-02-2014 to 18- 02-2014). The aphid population attained its maximum peak (2.50 aphids/ 6 leaves), during 7th SW (12-02-2014 to 18-02-2014). During this period maximum and minimum temperatures were 23.90C and 9.50C respectively, whereas morning and evening relative humidity were 88 % and 41% respectively. Further sunshine ,rainfall and rainy days were 7.7hrs, 12.0 mm and 2 day respectively during this week. Maximum temperature, sunshine, rainfall, and rainy day exhibited positive correlation with aphid population. The thrip population appeared from 14-03-2014 i.e. during the 11 th SW (12-03-2014 to 18-03 2014) and was available upto 21st SW (21-05-2014 to 27-05-2014). The thrip population attained its maximum peak (4.30 thrips /6 leaves), during 20th SW (14-05-2014 to 20-05-2014). During this period maximum and minimum temperatures were 39.50C and 22.30C respectively, whereas morning and evening relative humidity were 52 % and 19 % respectively. Further sunshine, rainfall and rainy days were 8.60 hrs, 10.60 mm and 1 day respectively. Rainfall of the same week showed significant positive correlation with thrip population. The fruit borer population appeared from 12th SW (19-03-2014 to 25- 03-2014) and was available upto 21st SW (21-05-2014 to 27-05-2014). The fruit borer population attained its maximum peak (2.17 larvae /plant), during 21st SW (21-05-2014 to 27-05-2014). During the peak larval population, the maximum and minimum temperatures were 40.50c and 24.90c, respectively. Morning and evening relative humidity were 48 % and 20 % respectively, whereas sunshine was 10.9 hrs, There was no rainfall during this period. Percentage morning relative humidity of the same week has exhibited significant positive correlation) with the larval population. On the basis of the effectiveness of different treatments against chilli thrips, lowest population was recorded in fipronil 5% SC which was 2.39 thrips /6 leaves, followed by imidacloprid 17.8%SL (2.43 thrips /6 leaves), and propergite 57%EC (2.71 thrips /6 leaves). All the treatments were significantly superior over the control which recorded highest thrip population (15.37 thrips /6 leaves). On the basis of the effectiveness of different treatments against chilli fruit borer and the marketable fruit yield obtained, emamectin benzoate 5%SG (1.37 larvae /plant). , trizophos 40%EC (1.94 larvae /plant) and imidacloprid 17.8%SL (1.98 larvae /plant), proved to be the most effective treatments, not only in reducing the damage due to fruit borer but also recorded higher marketable fruit yields (158.57 kg/ha, 113.46 kg/ha and 101.37 kg/ha, respectively).
  • Thumbnail Image
    ThesisItemOpen Access
    Studies on mass production of beauveria bassiana (Bals.) vuill., its efficacy and compatibility wit some new generation insecticides against pigeonpea pod borer
    (JNKVV, 2015) Tank, Narendra; Saxena, A.K.
    ABSTRACT Present research work on “Studies on mass production of Beauveria bassiana (Bals.) Vuill., its efficacy and compatibility with some new generation insecticides against pigeonpea pod borer complex” was carried out in the experimental field of Department of Entomology, Live Stock Farm, Adhartal, JNKVV, Jabalpur (M.P.) during kharif 2014-15. The experiments were conducted with the following objectives: 1. To study the influence of temperature and nutrient on mass production of Beauveria bassiana on local substrates. 2. To study the bioefficacy and compatibility of B.bassiana with new generation insecticides against pigeonpea pod borer complex. 3. To study the population dynamics of pigeonpea pod infesting insect pest complex. Broken wheat grains were found to be the best substrate for mass production of B. bassiana as it produced maximum spore production in minimum time followed by broken rice, but in case of viability of spore broken rice grains was recorded maximum viable spores, highest biomass production was recorded on broken wheat grains media and highest dry matter production was recorded on water soaked rice and substrate with nutrient for mass production of B. bassiana as it produced maximum spore, viable spore, biomass and dry matter production and best temperature was found at 300C. All the chemical insecticides and biopesticides proved their superiority over control in reducing the pod and grain damage and increasing the grain yield. On the basis of the effectiveness of different treatments against pod borer complex on grain damage and grain yield revealed that among chemicals rynaxypyr 20%SC and in case of pod fly triazophos 40%EC is effective treatments. Insecticide B.b + emamectin benzoate maximum cost benefit ratio (1:9.60). Invitro studies in compatibility of B. bassiana with chemicals show that rynaxypyr 20%SC was most compatible with least growth inhibition percentage. The first group insects to appear on the crop were pod bug, gram pod borer, pod fly, green stink bug and red gram plume moth respectively. These appeared when the crop age was reproductive stage and remained available upto the maturity of the crop. These pests were the major key pests which caused colossal yield losses. Green stink bug : Green stink bug was first observed in the 40th SW. Minimum temperature, evening relative humidity, morning and evening vapour pressure exhibited negative effect on green stink bug (nymph + adult) population. Pod bug : Pod bug (nymph + adult) was first observed in the 40th SW. Maximum and minimum temperature and morning and evening vapour pressure showed negative effect on nymph and adult population. Gram pod borer : Gram pod borer larva was first observed in the 45th SW. Maximum temperature showed positive and morning relative humidity showed negative effect on pod borer larvae population Tur plume moth ; Plume moth larva and pupa was first observed in the 45th SW. All the abiotic factors (included in the study) did not exhibit any impact on plume moth larval population. Pod fly : Pod fly population was first observed in the 45th SW. All the abiotic factors (included in the study) did not exhibit any significant influence on pod fly maggot population.
  • Thumbnail Image
    ThesisItemOpen Access
    Studies on population dynamics and chemical control of major insect pests of okra (Abelmoschus esculentus L. moench)
    (JNKVV, 2015) Aarwe, Rajesh; Pachori, R.
    ABSTRACT Present research work on “Studies on population dynamics and chemical control of major insect pests of okra (Abelmoschus esculentus L. Moench)” was carried out in the experimental field of Department of Entomology, Live Stock Farm, Adhartal, JNKVV, Jabalpur (M.P.) during kharif 2014. The experiments were conducted with the following objectives: 1. To study the succession of insects and natural enemies in okra. 2. To study the population dynamics of major insect pests of okra in relation to weather parameters. 3. To study the efficacy of some new insecticides against jassids, aphids and shoot & fruit borer of okra. Five different species of insect pests and one natural enemy were recorded on the okra crop at experimental field of Department of Entomology, Live Stock Farm, Adhartal, JNKW, Jabalpur (MP.) during kharif 2014 which represented 3 orders (Hemiptera , Lepidoptera and Coleoptera) and 6 families (Cicadellidae, Aphididae, Aleyrodidae, Pyrrhocoridae, Noctuidae and Coccinellidae). The jassid appeared when the crop age was about 23 days old i.e. during vegetative stage and remained available upto maturity stage of the crop. Aphid was the next insect pest to appeared on the crop during the vegetative stage and remained available upto reproductive stage (flowering / fruiting stage) of the crop i.e. 18th September 2014. Whitefly was also appeared at vegetative stage and remained available upto the reproductive stage (flowering / fruiting stage) of the crop i.e. 2nd October 2014. Red cotton bug was appeared on the crop, when the crop age was about 85 days old and present for a very short duration (up to 99th day) i.e. during the maturity stage of the crop. Shoot and fruit borer was appeared on the crop, when the crop age was about 47 days old i.e. during reproductive stage and remained available upto maturity stage of crop. Lady bird beetle appeared when the crop age was about 42 days old and remained available from vegetative to reproductive stage (84th day). The jassid, Amrasca biguttula biguttula (Ishida) was first observed during 31st SW (first week of August) (i.e.30 July to 5 August) and remained available upto maturity stage of the crop with peak activity during 37th SW (i.e. 10th to 16th September, 2014). Correlation between various abiotic factors and jassid population showed that maximum temperature was found to be significant positive correlation. Further, minimum temperature, sunshine, no. of rainy days, morning & evening vapour pressure and evaporation exhibited positive influence while morning & evening relative humidity, wind velocity and rainfall showed negative influence with jassid population but statistically found to be non-significant. The activity of aphid, Aphis gossypii (Glover) was first recorded in the first week of August (31st SW, 30 July to 5 August) with peak activity during 36th SW (i.e. 3rd to 9th September). Correlation between various abiotic factors and aphid population showed that maximum & minimum temperature, morning relative humidity, sunshine hour, no. of rainy days, morning and evening vapour pressure were found to be positive correlation while evening relative humidity, wind velocity, rainfall and evaporation showed negative correlation with aphid population but statistically found to be non significant. The whitefly, Bemisia tabaci Genn. was first observed during 31st SW (first week of August) (i.e.30 July to 5 August) and remained available upto reproductive stage (flowering / fruiting stage) of the crop i.e. 2nd October 2014 (40 SW, 1st to 7th October) with peak activity during 34th SW (i.e. 20th to 26th August). Correlation between various abiotic factors and whitefly population showed that minimum temperature was found to be significantly positive. Further, maximum temperature, evening relative humidity, rainfall, no. of rainy days, morning & evening vapour pressure showed positive correlation while, morning relative humidity, wind velocity, sunshine and evaporation showed negative correlation with whitefly population but statistically were found to be non-significant. The activity of shoot and fruit borer, Earias vittella Fab. was observed from 35th SW (first week of September) (i.e. 27th to 2nd August) with peak activity during 36th SW (i.e. 3rd to 9th September). Correlation between shoot and fruit borer, E. vittella and morning & evening relative humidity, rain fall and no. of rainy days showed positive correlation while, maximum temperature, minimum temperature, wind velocity, sunshine, morning & evening vapour pressure and evaporation showed negative correlation with shoot and fruit borer population but statistically were found non significant. The various molecule evaluated in which emamectin benzoate 5 SG @ 12 g a.i./ha against shoot and fruit borer (Earias vittella F.) and thiamethoxam 25% WG @ 50 g a.i./ha against jassid (Amrasca biguttula biguttula Ishida) and aphid (Aphis gossypii Glover) were found significantly more effective on okra (Abelmoschus esculentus L. Moench) during kharif 2014. Maximum cost benefit ratio was obtained in triazophos 40% EC @ 400 g a.i./ha (1:15.60) this was followed by thiamethoxam 25% WG @ 25 g a.i./ha (1:14.25), imidacloprid 17.8% SL @ 21.36 g a.i./ha (1:13.11), thiamethoxam 25% WG @ 50 g a.i./ha (1:12.89), emamectin benzoate 5%SG @ 12 g a.i./ha (1:9.83) and emamectin benzoate 5%SG @ 10 g a.i./ha (1:9.27), respectively.