抗性水稻品种对褐飞虱和白背飞虱种群参数的影响

在半自然状态下 ,用生命表方法初步比较了褐飞虱Nilaparvatalugens和白背飞虱Sogatellafurcif era在 4个抗褐飞虱水稻品种ASD7,IR3 6,JX89和Mudgo上的种群参数。初步的结果表明 ,白背飞虱在 4个抗褐飞虱水稻品种上具有较高的繁殖率 ,较短的发育时间和较大的种群增长。对褐飞虱各种群参数影响最大的是JX89,对白背飞虱影响最大的是Mudgo。与感性品种TN1比较 ,这些抗褐飞虱的水稻品种对 2种稻飞虱均具有不同程度的抗性。这些结果说明 ,抗褐飞虱水稻品种对白背飞虱同样具有一定的抗性 ,但白背飞虱对这种抗性具有较强的适应性 ,如果在一个地区长期推广抗褐飞虱的水稻品种 ,势必会导致白背飞虱的大发生

Influence of resistant rice varieties to the population parameters of Nilaparvata lugens and Sogatella furcifera

Population parameters of Nilaparvata lugens (BPH) and Sogatella furcifera (WBPH) were preliminarily compared under semi natural conditions, using 4 BPH resistant rice varieties, ASD7, IR36, JX89, and Mudgo. The results indicated that on these rice varieties, WBPH had higher reproductive rate shorter developmental time, and higher population increase rate than BPH did. The most resistant variety to BPH is JX89, and that to WBPH is Mudgo. Compared with the susceptible TN1, all these resistant rice varieties have different levels of resistance to the two planthopper species, suggesting that BPH resistant rice varieties are also resistant to WBPH, but WBPH is better adaptive to these varieties. It is suggested that if the BPH\|resistant rice varieties are released in a district for a long term, it will inevitably cause the outbreaks of the whiteback planthopper.