Worldwide, the potato tuber moth (PTM), Phthorimaea operculella (Zeller), is one of the most severe pests affecting potato (Solanum tuberosum L.), whether in open-air crops or during tuber storage. This work examines the potential control of this pest by two species of predatory mites, Macrocheles robustulus (Berlese) and Blattisocius tarsalis (Berlese), on pest eggs under laboratory conditions. In the two first assays, the acceptance rate of the pest eggs was assessed for each predatory mite. Then, in a third assay, the functional response of B. tarsalis was studied. The results showed that Macrocheles robustulus did not prey on the pest eggs (number of eggs surviving = 4.33 ± 0.38), whereas B. tarsalis did (number of eggs surviving = 0.5 ± 0.5). Likewise, B. tarsalis showed a type II functional response when it killed the eggs. The results showed the potential use of Blattisocius tarsalis as a biological control agent of P. operculella in potato under storage conditions.

中文翻译：

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捕食性螨的选择对贮藏马铃薯中块茎蛾的生物防治

在全球范围内，无论是在露天作物中还是在块茎贮藏期间，马铃薯块茎蛾（PTM）装满白蚁（Phthorimaea operculella（Zeller））是影响马铃薯（Solanum tuberosum L.）的最严重害虫之一。这项工作研究了在实验室条件下，由两种捕食性螨虫，Macrochelesrobustulus（Berlese）和Blattisocius tarsalis（Berlese）对害虫卵的潜在控制作用。在前两个试验中，评估了每种捕食性螨的有害生物卵的接受率。然后，在第三种测定中，研究了酒渣双歧杆菌的功能应答。结果表明，大螯 虾不会捕食害虫卵（存活的卵数= 4.33±0.38），而睑板芽孢杆菌会捕食有害生物的卵（存活的卵数= 0.5±0.5）。同样地，酒石双歧杆菌杀死卵后也表现出II型功能性反应。结果表明，潜在用途Blattisocius跗作为生物控制剂P.蛾在马铃薯储存条件下。