水稻品种形态特征对稻虱缨小蜂功能反应的影响

在室内研究了水稻品种形态特征对褐飞虱卵在稻株上的分布以及由此而对稻虱缨小蜂功能反应的影响.结果表明,在所有测试品种中,褐飞虱卵在稻株上的垂直分布型可归为3类,即上中部为主分布型、中下部为主分布型和均匀分布型.稻株上、中、下各部位的褐飞虱卵量多少与其相应部位叶鞘鞘脊的相对高度呈极显着正相关.稻虱缨小蜂对上中部为主分布型褐飞虱卵(在浙农大40上)的功能反应明显地强于对中下部为主分布型的褐飞虱卵(在浙852上).

Effect of morphological characters of rice varieties on functional response of Anagrus nilaparvatae

A laboratory experiment is conducted to study the effect of morphological characters.of rice varieties on distribution of Nilaparvata lugens eggs on rice plants and the functional response of Anagrus nilaparvatae to it.The results show that for all rice varieties tested,the vertical distribution of N.lugens eggs on the plants could be divided into three types:mainly on the upper and middle parts of rice plant,mainly on the middle and lower parts of rice plant,and uniform distribution. The number of N.lugens eggs on the upper,rniddle and lower parts of rice plant is very significantly positively correlated with the relative height of leaf sheath back at the corresponding parts of rice plant.The functional response of the parasitoid to N. lugens eggs mainly distributed on the upper and middle parts of rice plant ZND40 is obviously stronger than that mainly distributed on the middle and lower parts of rice plant Z852.