Effects of Soybean Trypsin Inhibitors on Therioaphis trifolii Monel (Homptera: Aphididae)

doi:10.16409/j.cnki.2095-039x.2018.03.012

Abstract

Abstract: Spotted alfalfa aphid, Therioaphis trifolii Monel, causes huge damages of alfalfa. Application of biological agents can ensure a sustainable management. In this paper, two different soybean trypsin inhibitors (KTI and BBI) were tested for their inhibition effects on spotted alfalfa aphid using artificial feeding method. The results showed that the survival rate of adult aphids decreased with the time post feeding of KTI and BBI (800 μg/mL). In comparison with the control, 72 hours after feeding of KTI and BBI, the survival rate of adult aphids were reduced by 38.3% and 41.7%, respectively, the reproduction rate, by 128.3% and 116.7%, respectively, and the survival rate of the larval aphids, by 6.7% and 19.7%, respectively. These results indicate that the soybean trypsin inhibitors KTI and BBI can effectively reduce the population density of the spotted alfalfa aphid.

Key words: trypsin inhibitor, spotted alfalfa aphid, biological pesticide, survival rate, reproduction rate

CLC Number:

S476

ZHAO Hailong, SHI Yang, TU Xiongbing, DONG Hui, ZHANG Zehua. Effects of Soybean Trypsin Inhibitors on Therioaphis trifolii Monel (Homptera: Aphididae)[J]. journal1, 2018, 34(3): 348-353.

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