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1.前言查明松树异常枯损的原因,由于松干线虫(Bursaphelenchus lignicolus)造成的,已有十年了,尽管有关当局不断努力,松树的被害仍然日益扩大。防治的最好方法,有空中喷洒杀螟松药剂,喷洒过的地区,正在起着良好的防治效果。杀螟松(Sumithion)是有机磷杀虫剂,在生物体内能比较迅速地降解,又具有积累少的特性,一般认为,在自然界残留也少。有机磷杀虫剂对人畜有剧毒,但杀螟松的毒性比较低,故在农业生产上,常用它防治虫害。在森林上空喷洒,虽与农业生产上的使用有所不同,对人畜影响少,但对自然环境的影响,则应该严密注意调查研究。
1. Preface It has been ten years since the pine tree nematode (Bursaphelenchus lignicolus) has been identified as the cause of the anomalous loss of pine trees and the number of pine trees is still growing despite the continuous efforts of the relevant authorities. The best way to prevent and cure is aerial spray fenitrothion pesticide, spraying the area, is playing a good control effect. Sumithion is an organophosphorus insecticide that degrades more rapidly in organisms and has less accumulated properties. It is generally believed that there are few residues in nature. Organophosphorus pesticides are highly toxic to humans and animals, but the toxicity of fenitrothion is relatively low, so it is often used in agricultural production to control pests. Spraying above the forest, although different from the use in agricultural production, has little impact on human beings and livestock, but its impact on the natural environment should be closely investigated.