ABSTRACT Crop covers made from polymer meshes have proved successful in protecting potatoes from tomato potato psyllid in New Zealand. However recent field trials indicated that aphids could penetrate these mesh covers resulting in high levels of aphid plant infestation. The current study used a laboratory assay to examine the mesh pore dimensions required to prevent penetration by apterous adults of two species of aphids commonly found on potatoes. Of the 22 commercial meshes tested, Myzus persicae managed to pass through 20 and Aphis gossypii managed to pass through 21. Logistic regression analysis indicated that the maximum allowable pore dimensions to exclude (99% of) aphids were approximately 0.06 mm in length, 0.15 mm diagonal and an area of 0.012 mm2. None of the meshes tested met any of these criteria, and if crop covers are to be used to protect crops from both TPP and aphids then meshes with smaller pore sizes would be required.

中文翻译：

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用于保护马铃薯免受蚜虫侵害的网状作物覆盖物的孔径要求

摘要 在新西兰，由聚合物网制成的作物覆盖物已被证明可以成功地保护马铃薯免受番茄马铃薯木虱的侵害。然而，最近的田间试验表明，蚜虫可以穿透这些网状覆盖物，导致高水平的蚜虫侵染。目前的研究使用实验室分析来检查防止马铃薯上常见的两种蚜虫的无翅成虫渗透所需的网孔尺寸。在测试的 22 个商业网眼中，桃蚜成功通过了 20 个，棉蚜成功通过了 21 个。逻辑回归分析表明，排除（99%）蚜虫的最大允许孔隙尺寸约为 0.06 毫米长，0.15 毫米对角线和 0.012 mm2 的面积。测试的网格均不符合这些标准中的任何一个，