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Toxicity of Insecticides to Bradysia odoriphaga at Different Temperatures and Their Control Effect in the Fields(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2014年09期
Page:
125-128
Research Field:
Publishing date:

Info

Title:
Toxicity of Insecticides to Bradysia odoriphaga at Different Temperatures and Their Control Effect in the Fields
Author(s):
LI Xian-xian; MA Xiao-dan; XUE Ming; LI Zhao xia
College of Plant Protection,Shandong Agricultural University,Tai’an,Shandong 271018
Keywords:
Bradysia odoriphaga; neonicotinoid insecticides; toxicity; temperature effect; efficacy
PACS:
S 633.3
DOI:
-
Abstract:
Taking 5 kinds of pesticide as test drug and Bradysia odoriphaga as test pest,the effect of temperature on toxicity of seclected insecticides on Bradysia odoriphaga was evaluated,the toxicities of 5 insecticides in 8、16、24℃ were studied with dripping ration liquid method,and their control efficiency in the field were also studied.The results showed that the toxicities of 5 insecticides showed positive temperature effect.Among these insecticides,Imidacloprid showed the most obvious positive temperature effect,toxicity of Imidacloprid in 24℃ was 4.66 times higher than that in 8℃.Methomyl,Clothianidin and Thiamethoxam’s positive temperature effect were similar,and the positive temperature effect of Emamectin benzoate was minimum.In pot test,Emendation larvae mortality was 75.2% when roots were irrigated by Clothianidin 50 mg/L,which was 14.5%,24.8% and 28.2% higher than the same dose treatment of Methomyl,Imidacloprid and Thiamethoxam respectively.In field test,Clothianidin 100 mg/L and 50 mg/L irrigating roots treatments were the best when processed 25 days.The pesticide effect of Clothianidin were 100% and 95.2% while control efficiency of Methomyl 200 mg/L was 84.2%.Pesticide effect of Imidacloprid and Thiamethoxam 100 mg/L irrigating roots were 93.7% and 96.9%respectively,which were also better than Methomyl 200 mg/L and 100 mg/L.The 3 kinds of neonicotinoids all had good pesticide effect on Bradysia odoriphaga.Among them,Clothianidin was outstanding and had a persistent control function on Bradysia odoriphaga.It was environment friendly and very suitable for the application in the fields.

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Last Update: 2014-08-13