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1986—1988年在全省37个有代表性地点,依发生为害时期采集褐稻虱。进行了苗期反应、泌露量测定和生存率试验。此外,在本院田间建立了褐稻虱生物型监测圃,调查自然状态下鉴别品种上褐稻虱虫口密度的变化情况。共测定49个样本、138次试验或调查,结果表明有42个点次,除不带抗性基因的鉴别品种 TN1表现感虫外,其他带抗性基因的鉴别品种表现抗虫,属生物型1的反应;海康、陵水、新会、惠州等地的褐稻虱经过2—5次重复取样测定亦表现为生物型1反应;田间2年4造16次调查,在 TN1上的相对虫口密度比其他带抗性基因品种上的虫口密度高91—100%,说明也是生物型1为优势种群。但有7个点次的褐稻虱在个别测定项目中出现非生物型1的反应,其实质有待进一步研究。
1986-1988 in the province’s 37 representative locations, according to the time of the injury collected brown planthopper. Seedling reaction, determination of the amount of dew and survival test were carried out. In addition, a brownfield planthopper biometric monitoring nursery was established in this field to investigate the changes of population density of brown planthopper on natural cultivars under natural conditions. A total of 49 samples were tested, 138 tests or surveys, the results showed that there are 42 points, in addition to the identification of non-resistant varieties TN1 performance of susceptible insects, the other varieties with resistance genes showed resistance to insects, is a biotype 1 response; Haikang, Lingshui, Xinhui, Huizhou and other places of brown planthopper after repeated sampling of 2-5 times also showed biotype 1 reaction; field 2 years 4 made 16 times the survey in TN1 relative The density of insect population was 91-100% higher than that of other resistant gene varieties, which indicated that biotype 1 was the dominant species. However, there were 7 non-biotype 1 reactions of brown planthopper in individual measurement projects, and the essence needs further study.