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十年来的鉴测结果表明.广西南宁、玉林、桂林三地区的褐稻虱已由过去生物型Ⅰ逐步向生物型Ⅱ转变,其对测定的鉴定品种Mudgo和IR26的为害程度已由原来1—3级转变为7—9级,即由抗虫变为感虫.
The results of 10 years of tests showed that the brown planthopper in Nanning, Yulin, Guilin, Guangxi Province has been gradually transformed from biotype Ⅰ to biotype Ⅱ, and the degree of damage to the identified cultivars Mudgo and IR26 has been changed from the previous 1- 3 to 7-9 levels, that is, from insects become susceptible to insects.