MANAGEMENT OF PEACH LEAF CURL APHID, Brachycaudus helichrysi (Kaltenbach) USING BIOPESTICIDES AND SOME NOVEL INSECTICIDES

Simple item page
dc.contributor.advisorGUPTA, DIVENDER
dc.contributor.authorSINGH, GAGANDEEP
dc.date.accessioned2016-11-17T14:54:28Z
dc.date.available2016-11-17T14:54:28Z
dc.date.issued2013
dc.description.abstractABSTRACT The studies on bioefficacy of neonicotinoids, biopesticides/plant products and their combinations carried out against peach leaf curl aphid, Brachycaudus helichrysi infesting nectarine and peach crops revealed foliar application of neonicotinoids, imidacloprid and thiamethoxam (both @0.008%) at pink bud stage followed by oxy-demeton methyl (0.025%) at fruit set stage, most effective (8.89-10.00% infestation) and superior over the recommended insecticide, oxydemeton methyl (15 and 20 % infestation in nectarine and peach) treatment. The biopesticides did not prove effective in managing the aphid. The pruning treatment was found superior over biopesticide treatments and even comparable to oxy-demeton methyl (0.025%) treatment. Toxicity studies conducted in the laboratory revealed oxy- demeton methyl (0.025%) extremely toxic to Coccinella septempunctata causing cent per cent mortality of the beetles. Imidacloprid (0.008%) and thiamethoxam (0.008%) were found moderately toxic (15-25% mortality) whereas, the plant products (pongamia and neem oil both @1%) were the safest (<2.5% mortality). In the field also, in the treatments where oxy-demeton methyl (0.025%) was used as second spray at fruit set proved harmful to the coccinellids whereas there was not much effect on syrphid flies population. The avoidable loss was appreciable (63-65%) in the treatments where imidacloprid/thiamethoxam was used as first spray followed by oxy-demeton methyl (0.025%). The treatments where imidacloprid (0.008%) spray was followed by oxy-demeton methyl (0.025%) showed highest benefit cost ratio in nectarine (51.21) and peach (41.72). None of the treatments showed any symptoms of phytotoxicity/ fruit injury indicating thereby their safety to both nectarine and peach.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/86117
dc.language.isoenen_US
dc.subEntomology
dc.these.typeM.Sc
dc.titleMANAGEMENT OF PEACH LEAF CURL APHID, Brachycaudus helichrysi (Kaltenbach) USING BIOPESTICIDES AND SOME NOVEL INSECTICIDESen_US
dc.typeThesisen_US
Files
Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
PDF M.Sc. Thesis Gagandeep Singh (2013).pdf
Size:
2.6 MB
Format:
Adobe Portable Document Format
Description:
Entomology(M.Sc.)
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
2.28 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Theses