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用2.5％可湿性溴氰菊酯和国产三氯杀虫酯(7504)进行现场喷洒灭蛉结果表明,每平方米墙面使用溴氰菊酯37.5mg、25mg和12.5mg剂量,可使白蛉数量比对照区降低13—19倍,削平季节高峰。当年的灭蛉效果超过50％的可湿性DDT。在模拟土墙和泸纸药膜上,残效至少可达50天以上。建议以每平方米12.5mg作为灭蛉喷洒剂量推广使用;7504每平方米1g的剂量可使白蛉数量降低8.9倍,值得进一步试用,但其剂型应研究改进。连续观察证明,在当地条件下,于喷洒后第三年白蛉密度可恢复到具有流行病学意义的程度。
The results of on-site spraying with 2.5% wet deltamethrin and domestic trichlorfenicol (7504) showed that using deltamethrin 37.5mg, 25mg and 12.5mg per square meter of wall surface, The number of 13-19 times lower than the control area, flattening the peak season. When the effect of extinction more than 50% of wettable DDT. In the simulation of wall and Lu paper mask, the residual effect of at least 50 days or more. It is recommended to use 12.5mg per square meter as the spraying dose for extinction. The dose of 750g per square meter can reduce the number of whitefly by 8.9 times, which deserves further trial. However, its dosage form should be improved. Continuous observation showed that under local conditions, the density of whiteflies in the third year after spraying could be restored to the extent of epidemiological significance.