Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/5810057483
Authors: Yeole, Rajendra Sitaram
Advisor: Nalwandikar, P. K.
Title: Monitoring of insecticidal resistance in diamondback moth Plutella xylostella (Linnaeus)
Publisher: Vasantrao Naik Marathwada Krishi Vidyapeeth, Parbhani
Language: en
Type: Thesis
Pages: 112
Agrotags: null
Keywords: Insecticidal, Diamond, Plutella xylostella, Spinosad, Fipronil
Abstract: Studies on monitoring of insecticidal resistance in cabbage diamondback moth and cabbage aphid were conducted at Department of Agricultural Entomology, College of Agriculture, Latur (V.N.M.K.V., Parbhani) during Kharif 2015. Resistance to insecticides was investigated by collecting field populations of Plutella xylostella from different locations of Maharashtra, India (Ahmednagar, Nasik, Pune, Solapur, Osmanabad and Latur). Based on variations in LC50 values and comparison with recommended dosages, the insecticidal resistance in cabbage diamondback moth from different locations of Maharashtra region was quite alarming to different viz., chlorantraniliprole, cyantraniliprole, emamectin benzoate, fipronil, indoxacarb and spinosad. Diamondback moth population of Nashik developed 40.04- fold resistance to cyantraniliprole 10.26 per cent OD which was higher than other field populations of diamondback moth. The resistance ratios varied greatly among the populations viz., chlorantraniliprole 18.5 per cent SG (12.8- to 2.07 -fold), cyantraniliprole 10.26 per cent OD (40.04- to 2.80 -fold), emamectin benzoate 5 per cent SG (19.49- to 3.88 -fold), fipronil 5 per cent SC (9.10- to 2.36-fold), indoxacarb 15.8 per cent EC (19.46- to 1.14-fold) and spinosad 2.5 per cent SC (20.14- to 4.53-fold). Aphid population of Pune recorded 96.74-fold resistance to thiamethoxam 25 per cent WG which was higher than other field populations of aphid. The resistance ratios varied greatly among the populations viz., acetamiprid 20 per cent SP (4.25- to 2.35-fold), cyantraniliprole 10.26 per cent OD (16.15- to 2.70-fold), dimethoate 30 per cent EC (2.71- to 1.02-fold) and thiamethoxam 25 pa- cent WG (96.74-to 3.12-fold). High resistance factor of cyantraniliprole 10,26 per cent OD, emamectin benzoate 5 per cent SG and spinosad 2.5 per cent SC against all field populations of cabbage diamondback moth indicated development of resistance against these insecticides. Amongst the different insecticides tested, chlorantraniliprole 18.5 per cent SG, fipronil 5 per cent SC and indoxacarb 15.8 per cent EC were exhibited highly toxic to all the field populations of cabbage diamondback moth evidenced low resistance ratio. Thus, amongst the different insecticides, chlorantraniliprole 18.5 per cent SG, fipronil 5 per cent SC and indoxacarb 15.8 per cent EC can be used in rotation with the different insecticides to suppress the resistant population of diamondback moth in cabbage ecosystem of Maharashtra region. High resistance factor of thiamethoxam 25 per cent WG against all field populations of cabbage aphid indicated development of resistance against these insecticide. Amongst the different insecticides tested, cyantraniliprole 10.26 per cent OD, dimethoate 30 per cent EC and acetamiprid 20 per cent SP were exhibited highly toxic to all the field populations of cabbage aphid evidenced low resistance ratio. Thus, amongst the different insecticides, cyantraniliprole 10.26 per cent OD, dimethoate 30 per cent EC and acetamiprid 20 per cent SP can be used in rotation with the different insecticides to suppress the resistant population of aphid in cabbage ecosystem of Maharashtra state.
Subject: Agricultural Entomology
Theme: Agriculture
These Type: M.Sc
Issue Date: 2016-05-30
Appears in Collections:Thesis

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