昆虫病原线虫与粘合剂混用的增效试验

EVALUATION OF INCREASING EFFECT USING ENTOMOPATHOGENIC NEMATODE WITH BINDER

应用一定浓度的水溶性粘合剂POA与病原线虫混合 ,可提高线虫的存活率、毒力及对寄主的致死速度。LRT50 为 0 .74,共毒系数大于 1 0 0 ,混剂增效显著。田间防治龟背天牛、桑天牛的效果比单用病原线虫提高 1 0 - 2 5%。

This paper has been introduced that one kind of water dissolving binder POA have been used mixing with entomopathogenic nematode Steinernema carpocapsae A 24 . POA water suspension in certain concentration:1:80, 1:120, and 1:160 as a contrast; nematode in the same concentration 10000 nematodes/ml. The results proved that two concentrations POA all can raise the survival rate of nematodes 15.2%(1:80)-20%(1:120) in the second hour respectively. The infect ability of nematodes also enhanced greatly, and the host mortality was increased obviously. Yellow mealworm Tenebrio molitor has been tested using nematode only, LT 50 =77.49, using nematode with POA LT 50 =57.4,the LRT 50 is 0.74. The efficiency of field trial for control litchi longhorn beetle and mulberry longhorn beetle raised 10 25% compared with only using nematode. POA is one kind of synergist having utilization value.