巴氏新小绥螨对水稻干尖线虫控制能力的评估

doi:10.16409/j.cnki.2095-039x.2021.01.014

摘要/Abstract

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Tyrophagus putrescentiae相比无显著差异，但净增殖率（R₀=31.4605）、内禀增长率（r_m=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；r_m=0.1973/d；λ=1.2181），而种群倍增时间（Dt=2.9962 d）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Holling II型圆盘方程拟合得到的公式为N_a=0.5645N₀/（1＋0.002484N₀），巴氏新小绥螨对水稻干尖线虫的捕食能力a/T_h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。

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

Abstract: 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 (r_m=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; r_m=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 N_a=0.5645N₀/(1+0.002484N₀). The predatory capacity (a/T_h) 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.

Key words: Neoseiulus barkeri, Aphelenchoides besseyi, growth and development characteristics, predation functional response

中图分类号:

S476.2

杨思华, 李曼, 陈淳, 徐春玲, 谢辉. 巴氏新小绥螨对水稻干尖线虫控制能力的评估[J]. 中国生物防治学报, 2021, 37(3): 472-479.

YANG Sihua, LI Man, CHEN Chun, XU Chunling, XIE Hui. Evaluation of the Control Ability of Neoseiulus barkeri on Aphelenchoides besseyi[J]. Chinese Journal of Biological Control, 2021, 37(3): 472-479.

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