摘要
该文对近年来褐稻虱迁入虫源的性质进行了探讨，结果表明迁入的虫源在鉴别品种Ｍｕｄｇｏ上的致害力，生存率、取食量和原始的种群生物型Ⅰ没有明显的差别；两者在酯酶同工酶谱带数目和ＲＦ值也没有差异。迁入的虫源在田间抗性品种上明显表现虫量少。因此，迁入江淮稻区虫源仍是种群生物型Ⅰ。人工在Ｍｕｄｇｏ上诱导产生的生物型Ⅱ再回到感性品种上连续饲养８代，其对Ｍｕｄｇｏ的致害性降为１．０级，表明了褐稻虱生物型的不稳定性。
\ The nature of the biotype of the brown planthopper (BPH) immigrating into rice field was recently studied. Results indicated that no obvious differences in virulence rate of survival honeydew excretion zymograms of the esterase isozyme had been found between the immigrant populations and the primitive population of BPH on susceptible cultivar Nanjing 11. Therefore, the immigrant populations of BPH were still of biotype Ⅰ in JiangHuai rice region, but their virulence to Mudgo had developed a little bit. The virulence to Mudgo decreased down to scale 1 0 when the BPH biotype Ⅱ fed on susceptible varieties for 8 generations, showing its virulent unstability.
出处
《昆虫学报》
CAS
CSCD
北大核心
1998年第3期275-279,共5页
Acta Entomologica Sinica
基金
国家九五攻关项目
江苏省自然科学基金
