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Effects of spirotetramat on development and reproduction of M yzus persicae ( H emiptera: A phididae)
Author(s) -
Wang ZeHua,
Gong YaJun,
Jin GuiHua,
Zhu Liang,
Wei ShuJun
Publication year - 2016
Publication title -
austral entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.502
H-Index - 39
eISSN - 2052-1758
pISSN - 2052-174X
DOI - 10.1111/aen.12174
Subject(s) - fecundity , nymph , biology , toxicology , reproduction , zoology , myzus persicae , offspring , toxicity , population dynamics , aphid , horticulture , botany , population , ecology , medicine , pregnancy , genetics , environmental health
The G reen P each A phid M yzus persicae (Sulzer, 1776) is one of the most destructive pests of cultivated crops worldwide. Spirotetramat is an insecticide with a novel mode of action on aphids and other sucking pests. Here, we studied the effects of spirotetramat on the biology and development of M . persicae under laboratory condition. The results showed that spirotetramat at sublethal doses caused a decrease in nymph survival. However, we did not find sublethal effects on developmental duration of treated aphids or their offspring when exposed to LC 5 (0.2736 mg/ L ), LC 15 (0.5163 mg/ L ) and LC 25 (0.7531 mg/ L ) concentrations. Treatments with LC 30 (0.8808 mg/ L ), LC 60 (1.9830 mg/ L ) and the recommended concentration for field usage (60 mg/ L ) significantly reduced the longevity and fecundity of adult aphids. Gross fertility was reduced by 65.34%, 81.80% and 86.51% at LC 30 , LC 60 and recommended concentrations, respectively. The most significant feature of spirotetramat is that it induces nonviable nymphs, leading to a significant reduction in adult fecundity. The proportion of nonviable nymphs significantly increased with the concentration of spirotetramat. The gross and net reproductive rates were reduced by 68.91%, 83.97%, 97.25% and 65.61%, 81.94%, 97.10% at LC 30 , LC 60 , and recommended concentrations, respectively. The intrinsic rate of increase decreased to 0 when aphids were exposed to the recommended concentration. Our study showed that the reproductive toxicity of spirotetramat should be fully considered when attempting to evaluate the pesticide's action on insects.