INFLUENCE OF SUBLETHAL EFFECTS OF INSECTICIDES ON THE POPULATION DYNAMICS OF PLUTELLA XYWSTELLA AND ITS PARASITOID DIADEGMA EUCEROPHAGA IN THE FIELD |
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| Authors: | Dejiu Gu D. J. Wright J. K. Waage |
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| Affiliation: | South China Agricultural University;, Guangzhou 510642, China Imperial College at Silwood Park;, UK CAB International Institute of Biological Control;, UK |
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| Abstract: | Abstract The larvae of Plutella xylostella feeding on cabbage plants treated by insecticides, nomolt (25 ×10-6 and cypermethrin (20× 10-6 were exposed to their parasitoid, Diadegma euerophaga in the field. The life table technique and the control efficiency (CE) were used to evaluate the sublethal effects of insecticides on the population dynamics of P. xylostella and D. euerophaga . The results showed that the CEs of nomolt and cypermethrin on D. eucerophaga were bigger than that on P. xylostella . Nomolt had a profound effects on D. eucerophaga by the food chain. |
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| Keywords: | insecticide sublethal dose Plutella xylostella Diaciegma eucerophaga population dynamics control efficiency |
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