贵州人工草地中黑盲蝽及其天敌蜘蛛的种群发生动态

Population Dynamics of Adelphocoris suturalis and Nature Enemies Spiders in Guizhou Artificial Pastures

为提高人工草地中黑盲蝽的综合防控水平,采用网捕法调查了重要害虫中黑盲蝽及其天敌蜘蛛在黑麦草草地及豆禾混播草地的种群动态。结果表明:中黑盲蝽发生动态基本呈单峰型,6-7月虫口达峰值。黑麦草草地中黑盲蝽的种群数量与天敌蜘蛛的发生存在显著相关性,受蜘蛛种群制约作用强,发生量较小;豆禾混播草地中黑盲蝽的种群数量与蜘蛛发生数量间无明显相关性,发生量大。

Sweeping method was used to survey the A. suturalis and spiders community in grassland of L. perenne and mixed grassland in order to raise the level of integrated management of A. suturalis. Results： The occurrence regularity of A. suturalis in the artificial grassland was nearly single-peak type and the maximum population quantity period was from June to July. Obviously correlation existed between population quantity of the A. suturalis and spiders in grassland of L. perenne, and there was a small quantity of A. suturalis occurred because of the strong restrictive function of spiders. No significant correlation existed between population quantity of the A. suturalis and spiders in mixed grassland, and A. suturalisv occurred seriously.