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Authors: Krishan Kumar
Advisor: Chhillar, B.S.
Title: Toxicity of some insecticides to Trichogramma chilonis Ishii
Publisher: CCSHAU
Language: en
Type: Thesis
Agrotags: null
Keywords: Toxicity, Insecticides to Trichogramma Ishii
Abstract: Studies on the influence of 12 insecticides viz. Lindane 20 EC, neem (Achook 0.03 %), profenofos 50 EC, triazophos 40 EC, chlorpyriphos 20 EC, fenvalerate 20 EC, alphamethrin 10 EC, quinalphos 25 EC, carbaryl 50 WP, deltamethrin 2.8 EC, cypermethrin 25 EC and Bacillus thuringiensis (Halt 5 WP) on different biological parameters of T. Chilonis using Corcyra cephalonica Stainton as laboratory host were carried at 27  1oc and 75  5 % relative humidity in the Biocontrol Laboratory of the Department of Entomology, CCS Haryana Agricultural University, Hisar. Parasitization of C. Cephalonica eggs when exposed to T. Chilonis after insecticidal treatment was highest (except control, 28.50 %) in B. Thuringiensis (22.13 %) followed by neem (19.50 %). No parasitization was recorded when host eggs treated with lindane, profenofos, chlorpyriphos, quinalphos, deltamethrin, and cypermethrin treated host eggs. Parasitization in case of triazophos, fenvalerate, alphamethrin and carbaryl ranged between 2.47 to 3.07 per cent. Adult emergence from such parasitized eggs was highest i n B. RESULTS AND DISCUSSION Thuringiensis (88.30 %) followed by neem (80.88 %) and lowest in carbaryl (38.46 %). Sex ratio did not differ significantly among the treatments. When parasitized eggs (3 days old) of C. Cephalonica were dipped in different insecticidal solutions highest adult emergence (except control) was observed in B. Thuringiensis (84.60 %) followed by neem (73.20 %). No adult emergence was observed from parasitized eggs treated with lindane, profenofos, chlorpyriphos and quinalphos. Female longevity among the insecticides was highest in B. Thuringiensis (18.00 days) while lowest in carbaryl (0.25 days) and in control 20.10 days. Fecundity was highest in control (219.7 eggs) followed by B. Thuringiensis (195.3 eggs). Lowest fecundity was observed in triazophos (116.4 eggs) which was at par with deltamethrin (121.1 days). In residual toxicity test carbaryl was the insecticide which retained toxicity for maximum number of days (15 days) followed by lindane (10 days). Any insecticide in residual toxicity test did not influence adult emergence and sex ratio (per cent females in progeny). When adults of T. Chilonis were exposed to cotton leaves after 0, 1, 3, 5, 7, 10 and 15 days of spray only carbaryl caused mortality upto 15 days followed by lindane (10 days). On the basis of LC50 values, lindane (0.00059 %) was found most toxic insecticide as compared to others. Parasitization at LC50 was highest in B. Thuringiensis (84.51 %) and lowest in lindane (38.21 %).
Subject: Entomology
Theme: Toxicity of some insecticides to Trichogramma chilonis Ishii
These Type: M.Sc
Issue Date: 2004
Appears in Collections:M. Sc. Dissertations

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