Theses

Browse

Search Results

Now showing 1 - 9 of 42

Open Access
Development of different modules for management of insect pest in Capsicum under protected cultivation and study of newer insecticidal molecule mixture against insect pest of chilli
(G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2017-10) Suman Kumari; Srivastava, R.M.
Open Access
To study the field efficacy of newer insecticides as seed treatment and foliar application against various insect pests of potato
(G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2015-07) Sumit Kumar; Srivastava, R.M.
The present experiment was conducted from November- February, 2013 at Vegetable Research Centre, G.B. Pant University of agriculture and Technology, Pantnagar situated in Tarai region of Uttarakhand. A total of 10 species of insect pests belonging to 10 genera, 8 families and 4 orders were found to be associated with potato. Associated to these pest, 2 predators of aphids belonging to family Coccinelidae (Coleoptera) and 4 parasitioids belonging to families Eulophidae, Icheneomonidae, Braconidae and Pteromalidae were also reported. Out of 10 potato insect pests collected, the aphid (Myzus persicae), White fly (Bemesia tabaci) and leaf hopper ( Amrasca bigutulla bigutulla) were the predominant species infesting the potato crop. The initial appearance of potato aphid M.persicae during the cropping season 2013, (0.79 aphids/3 leaves) was observed during 47th standard week, attains its peak in 51st standard week whereas the appearance of whitefly (Bemisia tabaci) and jassid (Amrasca bigutulla bigutulla) at 47th, 47th standard week respectively and these pests attain peak with a population of (24.10 and 6.48 /3leaves) at 52nd and 50th standard week respectively. During the cropping season winter, 2013. As seed treatment Imidacloprid 200SL@0.04% solution was found as the most effective insecticides against aphids (Myzus persicae),whitefly (Bemesia tabaci), Jassid (A.bigutulla bigutulla) followed by Imidacloprid 600FS@15ml/100kg. During the cropping season winter, 2013. As foliar application Imidacloprid 70WG @90gm a.i./ha was found as the most effective insecticides against aphids (Myzus persicae),whitefly (Bemesia tabaci), Jassid (A.bigutulla bigutulla) followed by Thiomethaxam 25WG @90gm/ha while Imidacloprid 70WG @50gm/ha was appeared safest insecticides for existing natural enemy population.
Open Access
Bioefficacy of some insecticides against agriculturally important insect pests
(G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2015-06) Naorem Ibemu Devi; Srivastava, R.P.
Open Access
Eco-friendly management of wheat aphids at Pantnagar
(G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2015-06) Pande, Megha; Tiwari, Ruchira
The studies on eco-friendly management of wheat aphids at Pantnagar were carried out during crop season 2013-14 and 2014-15. The seasonal incidence of wheat aphids i.e. Microsiphum miscanthi and Rhopalosiphum padi was started in the month of January 2015 (4th Std week) and peak population of winged and wingless aphid reached in (8th Std week) February 2015 with peak population of natural enemies coccinella and syrphids during the same period. The studies on installation of yellow sticky traps for monitoring of alate aphids was found effective to trap alate aphids during their peak period of incidence. The studies on the efficacy of biopesticides, cow urine and cow urine based formulations clearly showed the effect of Metarhizium anisopliae, Beaveria bassiana, Azadirahctin 1500 ppm, neem seed kernel extract @ 5%, neem seed cow urine extract @ 2%, neem seed cow urine extract @ 2% and cow urine@ 20% against aphids with no adverse effect on population of natural enemies with significant increase in grain yield. On the other hand, i.e. Imidacloprid 17.8 SL, Clothianidin 50 WDG, Acetamiprid 20SP and Thiamethoxam 25 WG were found deleterious to population of natural enemies. Among the wheat lines screened under nursery conditions for aphid population, GW 432, UP 2843, UP 2872, HW 5224, WH 1098, WH 1129, NIDW 699 were found resistant with 3.40-5.93 aphids/shoot/plant, HPW 381, HS 578, KRL 348, HD 3095, RAJ 4250, DDK 1044, DDK 1045, HW 4042, HW 5235, UP 2847,UP 2871, HD 3121, WH 1137, were found moderately resistant with 6.13-10.80 aphids/plant and comparatively more aphid population was observed in HI 8724 (25.46 aphids/’shoot/plant) and Sonalika (21.50 aphids/shoot/plant) which were found highly susceptible for wheat aphids. The above studies clearly revealed that the natural enemies play major role in management of aphid population, yellow sticky traps were also found efficient for monitoring of alate aphid population and use of eco- friendly measures like biopesticides, cow urine in addition to resistant wheat varieties could be suitable alternatives to conventional chemicals which are safe, readily available, almost free of cost to farmers and have long term effect and easily be incorporated in an eco-friendly manner for management of wheat aphids in IPM programme.
Open Access
Evaluation of some essential oils against insect pests of stored grain
(G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2015-06) Yadav, Anju; Tiwari, S.N.
Experiments were conducted in the Post-Harvest Entomology Laboratory of Department of Entomology, G.B. Pant University of Agriculture & Technology, Pantnagar, to test the fumigant toxicity of six essential oils against stored grain insect pests viz. Sitophilus oryzae, Rhyzopertha dominica, Tribolium castaneum, and Callosobruchus chinensis. Most of the essential oils suppressed the feeding and breeding of test insects. The efficacy of oil was classified in different categories on the basis of F1 progeny production. The essential oils inhibiting more than 90 per cent F1 progeny were classified as highly effective while inhibition of 80-89 and 70-79 per cent were catagorized as moderately and less effective, respectively. Essential oils showing less than 70 per cent F1 progeny suppression were ranked as least effective for the control of the insect pests.The adults of R. dominica and C. chinensis were most susceptible to fumigant action of all six oils at 0.10, 0.09, 0.08, 0.07, 0.06, and 0.50% concentration while S. oryzae was found susceptible only at higher concentrations.All treatments were found least effective against T. castaneum.The bio-efficacy of essential oil was dependent on dose and exposure period.
Open Access
Morphological characterization of germplasm and effectiveness of newer insecticides against whitefly , Bemisia tabaci (Gennadius) in soybean (Glycine max (L.) Merrill
(G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2017-07) Karayat, Deepshikha; Gaur, Neeta
Open Access
Tritrophic interaction studies among the host, pest and their natural enemies in cowpea ecosystem
(G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2017-07) Rawat, Nidhi; Srivastava, Poonam
Open Access
Studies on interaction of insect pests and insect pollinators with cultivated flowering plants at Pantnagar
(G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2017-07) Dayananda Kumar, S.; Khan, M.S.
Open Access
Morphological characterization of germplasm and effectiveness of newer insecticides against whitefly, Bemisia tabaci (Gennadius) in soybean (Glycine max (L.) Merrill)
(G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2017-07) Karayat, Deepshikha; Gaur, Neeta

Theses

Browse

Thesis Type

Type

Author

Date

Subject

Search Results