Parasitism Rate of Habrobracon hebetor to Ephestia kuehniella Larvae: Residual Effect of Deltamethrin, Fenvalerate and Azadirachtin

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• 作者：Azadeh Jarrahi ; Seyed Ali Safavi
• 关键词：Insecticide ; Habrobracon hebetor ; functional response ; attack rate ; handling time ; Ephestia kuehniella
• 刊名：Journal of Insect Behavior
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：29
• 期：5
• 页码：548-556
• 全文大小：383 KB
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Animal Systematics/Taxonomy/ Biogeography
  Zoology
  Animal Physiology
  Ecology
  Evolutionary Biology
  
• 出版者：Springer Netherlands
• ISSN：1572-8889
• 卷排序：29

文摘

Sublethal concentrations of chemical insecticides may cause changes in some behavioral characteristics of natural enemies such as functional responses. The residual effect of three synthetic insecticides including deltamethrin, fenvalerate and azadirachtin were studied on functional response of Habrobracon hebetor Say to Ephestia kuehniella Zeller larvae. Seven host densities (2, 4, 8, 16, 32, 64 and 96) were used during a 24 h period. The resulting data were appropriately fit to Type II functional response models in all treatments: (1) control (0.0916 h−1; and T_h = 0.2011 h); (2) deltamethrin (a = 0.0839 h−1; and T_h = 0.3560 h); (3) fenvalerate (a = 0.0808 h−1 and T_h = 0.3623 h); and (4) azadirachtin (a = 0.0900 h−1 and T_h = 0.2042 h). Maximum theoretical parasitism rate (T/T_h) was 119.34 estimated for control wasps. There was no significant difference between the values of attack rates (a and a + D_a) in all treatments while the handling time was statistically affected in female wasps treated with fenvalerate. Our findings will be useful in safe application of these insecticides in pest management programmes.