Effect of insecticides on some parasitoids of insect pests of sugarcane

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dc.contributor.advisorKaushik, H.D.
dc.contributor.authorMalakari Baladandi
dc.date.accessioned2016-12-20T09:08:45Z
dc.date.available2016-12-20T09:08:45Z
dc.date.issued2005
dc.description.abstractStudies on the effect of 6 insecticides on the mortality, parasitization and adult emergence of sugarcane bioagents viz., Trichogramma chilonis Ishii, Trichogramma japonicum Ashmead, Ooencyrtus papilionis Ashmead and Epiricania melanoleuca Fletcher using Corcyra cephalonica Stnt. and Pyrilla perpusilla, respectively as host were carried out at 27±2oC temperature and 75-80 per cent relative humidity in the Central Biological Control Laboratory, Sonipat with assistance of Department of Entomology, CCS Haryana Agricultural University, Hisar. Dimethoate (56.66%) and monocrotophos (63.33%) recorded lowest per cent adult mortality of T.chilonis, hence they are relatively safe and are harmful when applied immediately after spraying. No insecticide is safer to T.japonicum at initial toxicity hence, all found harmful to use. Chlorpyriphos and monocrotophos gave 100 per cent mortality followed by endosulfan and profenphos (93.33%) so regarded as highly toxic to O.papilionis. There was 100 per cent mortality of E.melanoleuca when treated with chlorpyriphos and profenphos. Endosulfan, dimethoate, monocrotophos and oxy-demetan methyl treated eggs yielded high parasitization and are rated as comparatively safe insecticides and chlorpyriphos and profenphos severely inhibited the parasitization. The eggs treated with oxy-demetan methyl gave maximum adult emergence followed by dimethoate and monocrotophos where as endosulfan, chlorpyriphos and profenphos recorded very less per cent adult emergence. Based upon the residual toxicity to the parasitoids, dimethoate and oxydemeton methyl were considered as slightly persistent and endosulfan, chlorpyriphos, monocrotophos, profenphos were considered as moderately persistent with respect to adult mortality, parasitization and adult emergence as per IOBC guidelines. Chlorpyriphos and profenophos gave 13.33 and 23.33 per cent pupation and 40.0 and 30.0 per cent moth emergence found harmful at recommended doses of insecticides whereas in sublethal doses of insecticides, all found relatively safer to Epiricania melanoleuca.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/91241
dc.language.isoenen_US
dc.publisherCCSHAUen_US
dc.subEntomologyen_US
dc.these.typeM.Sc
dc.titleEffect of insecticides on some parasitoids of insect pests of sugarcaneen_US
dc.typeThesisen_US
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