论文部分内容阅读
我市园林树木年年发生蚜虫、介壳虫、红蜘蛛、木虱等害虫,由于树木高大,一般喷雾器射程喷不到,加上此类害虫繁殖力强,往往造成早期落叶,影响生长,污染环境。近年来,我们试用根部浇灌法,杀虫效果达95%以上。所用农药为40%乐果乳剂、92%磷胺油、50%内吸磷、75%甲拌磷等内吸剂。一般采用2000倍液灌注,对市区20多种行道树、庭院树,均无药害。
The annual occurrence of aphids, scale insects, spider mites and psyllids in the garden trees in our city is usually less than that of the nebulizers due to the tall trees and the strong propagation of such pests, often leading to early deciduous leaves that affect the growth and pollute the environment . In recent years, we try the root irrigation method, insecticidal effect of more than 95%. The pesticides used are 40% dimethoate emulsion, 92% phosphoric amine oil, 50% internal phosphorus, 75% phorate and other internal respirator. 2000 times the general use of liquid perfusion, more than 20 kinds of urban trees, garden trees, no injury.