Unmown ground cover mitigates the negative effects of insecticide on ground spiders in apple orchards

IF 1.3 4区农林科学 Q2 ENTOMOLOGY

Applied Entomology and Zoology Pub Date : 2022-09-07 DOI:10.1007/s13355-022-00796-4

Yasuyuki Komagata, Takaho Oe, Takayuki Sekine

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Abstract

In agroecosystems, natural enemies are important for sustainable agricultural production. Several studies have shown that spiders prey on pests and contribute to pest density control in apple orchards, making it important to develop orchard management methods that reduce the negative effects of chemical disturbances on such spiders. Here, we showed that unmown ground cover mitigated the negative effects of insecticide on ground spiders by shielding them from sprayed insecticide droplets. We compared the proportions of the ground surface wetted by spray droplets among four ground cover conditions. Also, we set up four treatments (with and without ground cover mowing and insecticide spraying) and compared the numbers of spiders trapped by pitfall traps. As a result, with unmown ground cover, the proportion of ground surface wetted by the spray droplets was small. Also, the number of spiders in the traps under unmown ground cover was not decreased by insecticide spraying, whereas spraying significantly decreased the number under mown ground cover. These results suggest that unmown ground cover helps conserve ground spiders by decreasing the number of spray droplets reaching the ground surface.

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未覆盖的地被物减轻了杀虫剂对苹果园地蜘蛛的负面影响

在农业生态系统中，天敌对可持续农业生产至关重要。几项研究表明，蜘蛛捕食害虫并有助于控制苹果园的害虫密度，因此开发果园管理方法以减少化学干扰对这种蜘蛛的负面影响非常重要。在这里，我们发现未修剪的地被物通过屏蔽喷洒的杀虫剂液滴来减轻杀虫剂对地面蜘蛛的负面影响。我们比较了四种地表覆盖条件下被喷雾液滴润湿的地表比例。此外，我们设置了四种处理方法(有和没有刈割地被物和喷洒杀虫剂)，并比较了陷阱捕获的蜘蛛数量。因此，在未刈割地被物情况下，被喷雾液滴润湿的地表比例较小。此外，喷洒杀虫剂对未刈地被下的蜘蛛数量没有显著影响，而对已刈地被下的蜘蛛数量有显著影响。这些结果表明，未修剪的地面覆盖物通过减少到达地面的喷雾滴的数量来帮助保护地面蜘蛛。

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来源期刊

Applied Entomology and Zoology 生物-昆虫学

CiteScore

2.70

自引率

7.70%

发文量

审稿时长

6-12 weeks

期刊介绍： Applied Entomology and Zoology publishes articles concerned with applied entomology, applied zoology, agricultural chemicals and pest control in English. Contributions of a basic and fundamental nature may be accepted at the discretion of the Editor. Manuscripts of original research papers, technical notes and reviews are accepted for consideration. No manuscript that has been published elsewhere will be accepted for publication.