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The dietary relationships of Tribolium castaneum (Herbst) with microfungi
Journal of Applied Entomology ( IF 1.7 ) Pub Date : 2020-10-23 , DOI: 10.1111/jen.12830
D. J. McFarlane 1, 2 , E. A. B. Aitken 2, 3 , A. W. Ridley 2, 4 , G. H. Walter 1, 2
Affiliation  

The ecology of Tribolium castaneum (Herbst) outside of grain storage facilities is poorly known. However, high densities of T. castaneum adults are known to infest stored cotton seeds (Gossypium hirsutum (L.)) in Queensland, Australia, despite the absence of stored food products in the immediate vicinity. Previous studies suggest that the beetles are attracted to the fungal colonies growing on the residual fibres that remain on the cotton seeds after ginning, but the specifics of this remain unclear, even as to the species of fungi involved. In the current study, 14 fungal species were isolated from stored cotton seeds collected from four sites in Queensland. The feeding preferences of the adult beetles and the developmental success of the larvae were recorded for each fungal species. Gut analyses of T. castaneum adults, after exposure in no‐choice feeding tests, showed that the beetles will feed on any one of the 14 fungal species when exposed (over 14 days) to cotton seeds that had been inoculated with one particular fungal species. The developmental success of the larvae varied depending on the fungal species, with most fungal species supporting only low levels of successful development (<30%). Tests with each fungal species and the volatiles they release revealed that neither adult nor larval survival was significantly affected by the presence of any particular fungal isolate. These results indicate that T. castaneum will feed on a variety of fungal species but that none of the tested fungal species on its own provides a good larval diet for T. castaneum.

中文翻译:

Tribolium castaneum (Herbst) 与微真菌的饮食关系

谷物储存设施外的 Tribolium castaneum (Herbst) 的生态知之甚少。然而,已知高密度的 T. castaneum 成虫会侵染澳大利亚昆士兰州储存的棉花种子 (Gossypium hirsutum (L.)),尽管附近没有储存的食品。先前的研究表明,甲虫被轧花后残留在棉花种子上的残余纤维上生长的真菌菌落所吸引,但具体情况仍不清楚,即使涉及的真菌种类也是如此。在目前的研究中,从昆士兰四个地点收集的储存棉花种子中分离出 14 种真菌。记录了每种真菌物种的成年甲虫的摄食偏好和幼虫的发育成功。T. castaneum 成虫的肠道分析,在无选择饲养试验中暴露后,表明当暴露(超过 14 天)与接种了一种特定真菌物种的棉花种子接触时,甲虫会以 14 种真菌物种中的任何一种为食。幼虫的发育成功取决于真菌物种,大多数真菌物种仅支持低水平的成功发育(<30%)。对每种真菌种类及其释放的挥发物进行的测试表明,任何特定真菌分离物的存在都不会显着影响成虫和幼虫的存活。这些结果表明,T. castaneum 会以多种真菌物种为食,但没有一种测试的真菌物种本身可以为 T. castaneum 提供良好的幼虫饮食。表明,当暴露于接种了一种特定真菌物种的棉花种子(超过 14 天)时,甲虫将以 14 种真菌中的任何一种为食。幼虫的发育成功取决于真菌物种,大多数真菌物种仅支持低水平的成功发育(<30%)。对每种真菌种类及其释放的挥发物进行的测试表明,任何特定真菌分离物的存在都不会显着影响成虫和幼虫的存活。这些结果表明,T. castaneum 会以多种真菌物种为食,但没有一种测试的真菌物种本身可以为 T. castaneum 提供良好的幼虫饮食。表明,当暴露于接种了一种特定真菌物种的棉花种子(超过 14 天)时,甲虫将以 14 种真菌中的任何一种为食。幼虫的发育成功取决于真菌物种,大多数真菌物种仅支持低水平的成功发育(<30%)。对每种真菌种类及其释放的挥发物进行的测试表明,任何特定真菌分离物的存在都不会显着影响成虫和幼虫的存活。这些结果表明,T. castaneum 会以多种真菌物种为食,但没有一种测试的真菌物种本身可以为 T. castaneum 提供良好的幼虫饮食。幼虫的发育成功取决于真菌物种,大多数真菌物种仅支持低水平的成功发育(<30%)。对每种真菌种类及其释放的挥发物进行的测试表明,任何特定真菌分离物的存在都不会显着影响成虫和幼虫的存活。这些结果表明,T. castaneum 会以多种真菌物种为食,但没有一种测试的真菌物种本身可以为 T. castaneum 提供良好的幼虫饮食。幼虫的发育成功取决于真菌物种,大多数真菌物种仅支持低水平的成功发育(<30%)。对每种真菌种类及其释放的挥发物进行的测试表明,任何特定真菌分离物的存在都不会显着影响成虫和幼虫的存活。这些结果表明,T. castaneum 会以多种真菌物种为食,但没有一种测试的真菌物种本身可以为 T. castaneum 提供良好的幼虫饮食。
更新日期:2020-10-23
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