【摘要】 通过对兰州市白蜡绵粉蚧的生物学特性观察,研究了其发生为害特点,并进行了相关药剂防治实验。结果表明,早春若虫出囊期(3月下旬至4月中旬)和若虫孵化期(6月下旬至8月上旬)使用20%融杀蚧螨、25%扑虱灵加99%绿颖等高效、低毒、低残留农药,可有效控制该虫危害。更多还原

【Abstract】 Through observating biological characteristics of Phenacoccus fraxinus of lanzhou,the study was car-ried out on its occurrence and harmful characteristics,meawhile,some related experiment was conducted on reagent con-trol.The results showed that during occyst period of nymphs in early spring(from late march to mid April) and nymphs incu-bation period(from late June to early August),using 20% Sodium Rosin Acid,25% buprofezin and 99% Enspray etc,high efficient,low toxicity and low residual pesticide could control the insect damage effectively.更多还原