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用二倍产毒杆菌(ЪТБ202)制剂作防治棕尾毒蛾老熟幼虫的试验,以杀虫细菌为标准。0.5％的制剂悬液喷洒杏树枝条,重复三次,对照用清水。每个枝条上放25条幼虫,并用纱布罩住枝条作隔离小室。用产毒杆菌的处理区到第7天,害虫死亡率达到100％,而用杀虫细菌的死亡率为83％,对照应全部是活虫。在扁桃树上作如下试验,(每株树上有虫800条)喷洒5％的ЪТБ—202悬掖,幼虫全部死亡;用杀虫细菌的尚有部份存活;对照的叶子和果实全部被毁,甚至嫩枝也被吃掉。
With twice the toxic toxins (Ъ ТБ202) preparations for the control of old brown moth moth larvae test to insecticidal bacteria as a standard. Apricot branches were sprayed with 0.5% of the formulation suspension, repeated three times, with clear water. Place 25 larvae on each branch and cover the branches with gauze to isolate the chamber. With the treatment zone of toxigenic bacteria on day 7, the mortality rate of pests reached 100%, while the mortality rate with insecticidal bacteria was 83%. All the controls should be live worms. The following tests were conducted on almond trees (with 800 insects per tree) sprayed with 5% Ъ ТБ-202 suspension and the larvae all died; the remaining part of the insecticidal bacteria survived; and the control leaves and fruits were all Ruined, even the twigs are also eaten.