The effects of insecticides and fungicides on growth and development of endosymbiotes in the brown planthopper(BPH),Nila paroata lugens stal,were studied in the paper.The results showed that after treated with different concentrations(500,1000,2000 times)of 10%imidacloprid WP,48%chlorpyrifos EC,10%deltamethrin EC,25%buprofezin WP,1.2% azadirachtin EC,75% chlorothalonil WP and 20% tricyclazole WP,the colony number of symbiotes were significantly reduced,and pseudohyphal growth of symbiote did not stretch and had a little shrink,and the yeast mostly became vacuoles.The higher the concentration was,the more inhibition the symbiote growth was subjected to.Recommendation dose of 5% jinggangmycin AS treatment had no significant influence on the endosymbiotes,but the fungicide at two times recommendation dose had stronger inhibitory role to growth and development of endosymbiote isolated from the BPH.These data showed that these pesticides had inhibitory roles of different degrees on growth and development of the symbiotes in the BPH.%本文研究了常用杀虫剂和杀菌剂对褐飞虱类酵母共生菌生长的影响.结果表明,10%吡虫啉可湿性粉剂、48%毒死蜱乳油、10%溴氰菊酯乳油、25%噻嗪酮可湿性粉剂、1.2%印楝素乳油、75%百菌清可湿性粉剂、20%三环唑可湿性粉剂的500、1000、2 000倍液处理后共生菌的生长(菌落数量)显著减少,共生菌的假菌丝生长不舒展,有所萎缩,酵母多形成空泡.浓度越高、共生菌生长受到抑制越显著.低浓度(常规推荐剂量及以下)井冈霉素对共生菌生长影响较小,而高浓度(2倍常规推荐剂量)处理影响很大.这说明常用杀虫剂和杀菌剂农药对褐飞虱类酵母共生菌的生长均有较大的抑制作用.
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