褐飞虱若干地理种群的主要为害特性研究

Damage characteristics of geographic populations of blown planthopper Nilaparvala lugens Stal:

本文探讨了褐飞虱(Nilaparvata lugens Stal)若干地理种群在水稻鉴别品种卜的为害特征;并着重分析了龙游(迁入区)种群和陵水(越冬区)种群的取食量、生存率和求偶鸣声等特征。结果表明,陵水、广州、龙游和杭州种群对水稻品种的致害性有较大的差异;除生物型1外,不同地理种群内均尚含有一定比例的生物型2,其中以陵水种群生物型2的比例最高。各褐飞虱种群的为害特性正在逐年发生变化,而陵水种群的变化较其它地理种群更为迅速。

The paper mainly deals with the damage characteristics on the different rice varieties by geographic populations of brown planthopper, Nilaparvala lugens Stal. with the emphasis on the determination of their feeding capacity, survival rates and mating signals, collected from Longyou, Zhejiang Province (Immigrant area) and lingshui, Hainan Province. The results indicated that the ability to attack rice varieties differed greatly among the geographic populations from Lingshui, Guangzhou. Longyou. and Hangzhou. Becides Biotype I which was usually predominated, each geographic population had some individuals of Biotype II, with exception of the population from Lingshui that had high proportion of Biotype II. The damage by each geographic population of BPH has changed year by year and the most obvious change occurred in the population from Lingshui in Hainan Province.