The benefits of spiders to regulate aphids in an insecticide-free orchard

Picture copyright Cahenzli et al.

In order to manage agricultural pests, the promotion of food resources and habitat quality to sustain natural enemies is a promising alternative to insecticides. Scientists Cahenzli et al. showed that abundance of spiders during the previous autumn reduced fruit damage caused by the rosy apple aphid during the following summer. Indeed, larger spider web areas caught more immigrating aphids in autumn, resulting in lower numbers of aphid fundatrices in the following spring and subsequently lower fruit damage.

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