巴氏新小绥螨对水稻干尖线虫控制能力的评估  

Evaluation of the Control Ability of Neoseiulus barkeri on Aphelenchoides besseyi

作　　者：杨思华 李曼 陈淳[1] 徐春玲[1] 谢辉[1] YANG Sihua;LI Man;CHEN Chun;XU Chunling;XIE Hui(Guangdong Province Key Laboratory of Microbial Signals and Disease Control/College of Plant Protection,Laboratory of Plant Nematology,South China Agricultural University,Guangzhou 510642,China)

机构地区：[1]华南农业大学植物保护学院植物线虫研究室/华南农业大学广东省微生物信号与作物病害防控重点实验室,广州510642

出　　处：《中国生物防治学报》2021年第3期472-479,共8页Chinese Journal of Biological Control

基　　金：国家重点研发计划(2017YFD0201000)。

摘　　要：本文研究了巴氏新小绥螨Neoseiulus barkeri以水稻干尖线虫Aphelenchoides besseyi为食的生长发育特征及其对水稻干尖线虫的捕食功能。结果表明,巴氏新小绥螨以水稻干尖线虫为食时,能正常发育并完成生活史,其生长发育各个历期与取食腐食酪螨Tyrophagusputrescentiae相比无显著差异,但净增殖率(R0=31.4605)、内禀增长率(rm=0.2313/d)和周限增长率(λ=1.2603)均分别高于取食腐食酪螨(R0=26.8800;rm=0.1973/d;λ=1.2181),而种群倍增时间(Dt=2.9962d)低于取食腐食酪螨(Dt=3.5126 d)。因此,巴氏新小绥螨取食水稻干尖线虫比取食腐食酪螨更有利于其各项生命活动。巴氏新小绥螨对水稻干尖线虫的捕食功能用HollingII型圆盘方程拟合得到的公式为Na=0.5645N0/(1+0.002484N0),巴氏新小绥螨对水稻干尖线虫的捕食能力a/Th为128.30,最大理论捕食量为227.27条/d。巴氏新小绥螨捕食水稻干尖线虫的最佳温度为25℃,在该温度条件下,饥饿4 d的雌螨对线虫的捕食量最大。研究结果证实了巴氏新小绥螨具有较强捕食水稻干尖线虫的能力,可以作为水稻干尖线虫潜在的天敌捕食螨。The growth and development characteristics of Neoseiulus barkeri feeding on Aphelenchoides besseyi and its predatory capacity to A.besseyi were studied.The results showed that N.barkeri could develop normally and complete its life cycle by feeding on A.besseyi.There was no significant difference in each developmental duration of N.barkeri between feeding on A.besseyi and Tyrophagus putrescentiae.However,the net reproductive rate(R0=31.4605),the intrinsic increase rate(rm=0.2313/d)and the finite increase rate(λ=1.2603)of N.barkeri feeding on A.besseyi were higher than those feeding on T.putrescentiae(R0=26.8800;rm=0.1973/d;λ=1.2181),respectively,and the population doubling time(Dt=2.9962 d)was lower than that of feeding on T.putrescentis(Dt=3.5126 d).Therefore,the life activities of N.barkeri feeding on A.besseyi was better than those feeding on T.putrescentiae.The predatory functional response of N.barkeri to A.besseyi was in accordance with Holling II equation and the formula was Na=0.5645 N0/(1+0.002484 N0).The predatory capacity(a/Th)of N.barkeri to A.besseyi was 128.30,and the maximum theoretical predation amount in a day was 227.27 nematodes.The optimal temperature for N.barkeri to prey on A.besseyi was 25℃.Under this temperature condition,the female mite starved for 4 d had the largest predation on the nematode.The results showed that N.barkeri had a strong predation effect and could be used as a potential natural enemy of A.besseyi.

关 键 词：巴氏新小绥螨 水稻干尖线虫 生长发育特征 捕食功能 

分 类 号：S476.2[农业科学—农业昆虫与害虫防治]