Doehler Marianne, Chauvin Delphine, Le Ralec Anne, Vanespen Émeline, Outreman Yannick
UMR 1349 IGEPP, Institut Agro, Université Rennes 1, INRAE, 35000 Rennes, France.
AOPn Fraises de France, 47310 Estillac, France.
Insects. 2023 Mar 21;14(3):302. doi: 10.3390/insects14030302.
Compared to open-field crops, the influence of the surrounding landscape on insect diversity in greenhouse crops has been poorly studied. Due to growing evidence of insect influx in greenhouses, identifying the landscape properties influencing the protected crop colonization by insect pests and their natural enemies would promote the improvement of both pest prevention and conservation biological control methods. Here, we present a field study on the effect of the surrounding landscape on the colonization of greenhouse crops by insect pests and associated natural enemies. By monitoring 32 greenhouse strawberry crops in the South West of France, we surveyed crop colonization by four insect pests and four natural enemy groups over two cultivation periods. Our results showed that the landscape structure and composition could have contrasting effects on insect colonization of greenhouse crops so there could be species-specific effects and not general ones. While the degree of openness of greenhouses and the pest management practices modulated insect diversity marginally, we also showed that seasonality represented a key factor in insect crop colonization. The various responses of insect pests and natural enemy groups to the landscape support the idea that pest management methods must involve the surrounding environment.
与露地作物相比，周围景观对温室作物昆虫多样性的影响研究较少。由于越来越多的证据表明昆虫会涌入温室，确定影响害虫及其天敌在保护作物上定殖的景观特性，将有助于改进害虫防治和保护生物防治方法。在此，我们展示一项关于周围景观对温室作物害虫及相关天敌定殖影响的田间研究。通过监测法国西南部的32个温室草莓作物，我们在两个种植期内调查了四种害虫和四个天敌类群在作物上的定殖情况。我们的结果表明，景观结构和组成对温室作物昆虫定殖可能产生相反的影响，因此可能存在物种特异性影响而非普遍影响。虽然温室的开放程度和害虫管理措施对昆虫多样性的影响较小，但我们也表明季节性是昆虫在作物上定殖的关键因素。害虫和天敌类群对景观的不同反应支持了害虫管理方法必须考虑周围环境的观点。
