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Sensitivity Test of Different Instars of Holotrichia oblita Larvas to  Two Insecticides(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2013年11期
Page:
113-115
Research Field:
Publishing date:

Info

Title:
Sensitivity Test of Different Instars of Holotrichia oblita Larvas to  Two Insecticides
Author(s):
LIU Yan-tao1; XI Guo-cheng2; FENG Xiao-jie2; ZHANG Ping2; LIU Chun-qin2; WANG Qing-lei2
1.Cangzhou Vocational College of Technology,Cangzhou,Hebei 061001；
2.Cangzhou Academy of Agriculture and Forestry Sciences，Cangzhou,Hebei 061001
Keywords:
insecticide; Holotrichia oblita; larva; toxicity
PACS:
S 433.8+3
DOI:
-
Abstract:
Based on the indoor rearing methods both of the Holotrichia oblita adults and larvaes,taking the soil mix with drugs,and the insecticides including chlorpyrifos,phoxim,chlorpyrifos microcapsule,phoxim microcapsule were prepared into a series concentration gradient according the concentration formulation,then the indoor toxicity of the Holotrichia oblita larvas at first instar,second instar and third instar were measured.The results showed that the missible oil was more efficiency than the corresponding microcaspules to the same instar at the same concentration gradient.The test of indoor virulence showed that the death rate of third instar larvae which disposed by emulsifiable for 5 days was significantly higher than the 10 days,while the 10 days’ mortality was higher than the 5 days’ when disposed by microcaspule.The mortality of the first instar larva was always higher than the second and third instar,so long as the concentrations were in the same level.

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Last Update: 2014-08-18