Field application of 2.5% betacyfluthrin microemulsion to peach fruit moth Carposina niponensis, in apple
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Key Words:dsbetacyfluthrin,microemulsion,Carposina niponensis, apple trees,safety
Abstract: The field application and safety evaluation results showed that the effects of 2.5% beta-cyfluthrin micro-emulsion in the dilution of 2 000-4 000 times to peach fruit moth, Carposina niponensis Walsingham, on apple trees in 3 different regions were 78.14%-99.57%, 87.50%-96.58% and 80.73%-96.20% after 5 d, 55.7%-99.01%, 77.78%-94.44% and 80.66%~99.29% after 10 d, 77.55%-100%, 77.55%-98.90% and 88.89%-96.58% after 15 d. The effect of 2.5% betacyfluthrin microemulsion in the dilution of 2 000-3 000 times was same as the control pesticide. So, the best dose was 2 000-3 000 times dilution and the appropriate period for spraying was enlargement period of apple fruit when it was the late stage of egg hatching of the pest. When rate of wormed fruit reached 1%, it would effectively control the pest after 5-10 d sprayin and get longer durability. There was no influence to growth of apple trees.