Potency of some novel insecticides at various environmental temperatures on<Emphasis Type="Italic">Myzus persicae</Emphasis> |
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| Authors: | Xiao-yi Wang Zuo-rui Shen |
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| Institution: | 1.The Key Laboratory of Forest Protection, State Forestry Administration, Research Institute of Forest Ecology, Environment and Protection,Chinese Academy of Forestry,Beijing,China;2.Dept. of Entomology,China Agricultural University,Beijing,China |
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| Abstract: | An attempt was made to achieve low environmental risk control of insect pests using sublethal concentrations of insecticides,
enhanced by the effect of high temperatures (>25°C). For each of the insecticides imidacloprid, abamectin, pirimicarb and
azadirachtin, the lethal and sublethal concentrations were determined for the green peach aphidMyzus persicae (Sulzer) (Homoptera: Aphididae) and its predator, the lady beetleHarmonia axyridis (Pallas). The lady beetle was more tolerant of all four insecticides, as well as of high temperatures below 40°C, compared
with the prey. The joint action of sublethal concentrations of insecticides and high temperatures was investigated to determine
the sublethal concentrations and temperatures that would be effective in controlling the aphids, but not detrimental to the
beneficial lady beetle. The results suggested a synergistic effect of sublethal insecticide concentrations and high temperatures
against the green peach aphid. |
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