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在室内比较研究了褐飞虱3个生物型对高温、饥饿、浸水和杀虫剂等逆境条件的抗性差异。结果表明,35℃高温条件下生物型1若虫的抗性显著低于生物型2,而在常温和37.5℃以上高 温下3个生物型的抗性无差异。22℃和26℃时生物型1雌成虫的耐饥力最强,生物型2最弱。在 常温下3个生物型卵浸水1至3d后的孵化率无明显差异,但在35℃高温下浸水5d后,生物型1 的卵孵化率明显降低。生物型1对甲胺磷的敏感性最高,而生物型2对噻嗪酮的耐药性则显著高于生物型1和生物型3。研究表明褐飞虱成虫的耐饥力和抗药性差异可能是影响迁入和迁出区致 害性差异的两个重要因子。
In the laboratory, three biotypes of BPH were comparatively studied for their resistance to high temperature, starvation, water immersion and insecticides. The results showed that the resistance of the biotype 1 nymphs was significantly lower than that of the biotype 2 under high temperature of 35 ℃, while the resistance of the three biotypes was not different under the high temperature of 37.5 ℃ and above. At 22 ℃ and 26 ℃, the biotype 1 female adults had the strongest starvation resistance and the biotype 2 was the weakest. There was no significant difference in the hatching rate of three biological eggs immersed in water for 1 to 3 days at room temperature, but the egg hatching rate of biological type 1 significantly decreased after immersed in water for 5 days at 35 ℃. Biotype 1 had the highest sensitivity to methamidophos, whereas biotype 2 had a significantly higher resistance to buprydizin than those of biotype 1 and biotype 3. Studies have shown that the differences in resistance to starvation and drug resistance of BPH adults may be two important factors that affect the virulence of immigrated and evacuated areas.