论文部分内容阅读
1988—1990年试验结果表明:50%杀螟松乳油250倍液树干喷孔施药防治光肩星天牛初孵幼虫效果达97—100%;在成虫补充营养期喷施200ppm 苏脲1号可使成虫产卵量减少88.3%,卵孵化率下降80%,幼虫全部死亡。当年幼虫期,几种施药方法比较以树干喷孔防治效果最好。与打孔注射和毒签防治比较,工效分别提高8.4和2.9倍;防治成本分别下降86.8%和71.9%,
1988-1990 test results show that: 50% fenitrothion EC 250 times the trunk spray nozzle application prevention and treatment of Atractylodes larvae effect of up to 97-100%; in the adult nutrition period spraying 200ppm Su urea 1 can make adult production The amount of eggs decreased by 88.3%, egg hatching rate decreased by 80%, all the larvae died. The larvae of the year, several spraying methods to spray the best results of the trunk hole. Compared with perforating injection and poisoning prevention and control, the work efficiency increased by 8.4 and 2.9 times respectively; the prevention and control costs decreased by 86.8% and 71.9% respectively,