Journal of Food, Agriculture and Environment

Toxicity of selected insecticides for onion maggot Delia antiqua (Meigen) adult and their bait-allure efficacy in the fields

Author(s):

Fangyuan Zhou, Zheng Wang, Xue Ming*, Haipeng Zhao, Huaqiang Xu

Recieved Date: 2013-07-09, Accepted Date: 2013-10-20

Abstract:

Onion maggot is a chief pest of onion, garlic and other Allium spp. crop around the world. In order to control the pest through adult management, contact and stomach toxicity of emamectin benzoate, clothianidin, spinosad, trichlorfon to Delia antiqua (Meigen) adult were tested indoors, and the effect of these insecticides (LC_30-40) on fecundity of Delia antiqua (Meigen) adult was also determined. Additionally, field experiment was conducted to evaluate the attract-and-kill efficiency of these pesticide-incorporated baits to onion maggot. Emamectin benzoate’s contact toxicity to female adult, the highest (4.505 µg fly^-1) among the four insecticides, is 5.9 times higher than trichlorfon’s. Clothianidin’s contact toxicity is 20.021 µg fly^-1 for female adult and it is 1.3 times higher than trichlorfon’s. However, spinosad’s contact toxicity for female (65.951 µg fly^-1) is lower than trichlorfon’s. Trichlorfon showed the highest stomach toxicity to onion maggot female adult, and its LC₅₀ is 1.168 mg kg^-1. Stomach toxicity of clothianidin and emamectin benzoate to onion maggot female adult were a bit lower than trichlorfon’s, LC₅₀ of clothianidin and emamectin benzoate were 3.784 mg kg^-1 and 4.159 mg kg^-1, respectively. The stomach toxicity of spinosad was the lowest. All the results of toxicity above revealed that male adult was more susceptible to these four insecticides than female adult. LC_30-40 dose digestion treatment of emamectin benzoate and spinosad reduced 55.8% and 36.5% of female fecundity significantly and respectively compared with the control during the 10-day experiment period, while clothianidin and trichlorfon showed no significant effect on adult fecundity. Clothianidin WG 50% and 2% emamectin benzoate EC diluted by 5% honey water solution to 2500 times and 1000 times showed excellent attract-and-kill performance on onion maggot control in field during adult emergence period. These two insecticides can be used in onion maggot attract-and-kill bait

Keywords:

Delia antiqua (Meigen), adult, insecticides, contact toxicity, stomach toxicity and attract-and-kill

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Journal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 3&4
Category: Agriculture
Pages: 1409-1413

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