Laboratory of Entomology and Agricultural Zoology, Department of Agriculture Crop Production and Rural Environment, University of Thessaly, Nea Ionia, Magnesia 38446, Greece.
United States Department of Agriculture, Agricultural Research Service, Center for Grain and Animal Health Research, 1515 College Ave., Manhattan, KS 66502, USA.
Bull Entomol Res. 2022 Aug;112(4):520-527. doi: 10.1017/S000748532100105X. Epub 2022 May 6.
Laboratory tests were carried out in order to examine the population growth of (Horn) (Coleoptera: Bostrychidae) and (L.) (Coleoptera: Curculionidae) on maize. These two species were placed either simultaneously or one species was allowed to colonize the kernels 7 days earlier than the other, at two temperatures, 26 and 30 °C for 65 days. Apart from progeny production, grain quality parameters, such as insect-damaged kernels (IDK) and undamaged kernels (NDK), the weight of frass and kernel weight were measured. Our data confirms that temperature plays a key role in the competition of these two species; seems to perform better at the higher temperature (30 °C), regardless of the presence of an additional species. Moreover, the results of the present study demonstrates that outcompetes . produced fewer progeny than in all combinations. Given the outcome of a competition, we hypothesize that most of the kernel damage was due to feeding by . Based on these data, we surmise that has a competitive advantage as an invasive species in new areas with stored maize, even in the presence of .
为了研究 (Horn)（鞘翅目：象甲科）和 (L.)（鞘翅目：象甲科）在玉米上的种群增长情况，进行了实验室测试。这两种物种要么同时放置，要么一种物种比另一种早 7 天定植在玉米粒上，在两个温度（26 和 30°C）下进行了 65 天的实验。除了后代的产量，还测量了谷物质量参数，如虫害玉米粒（IDK）和未受损玉米粒（NDK）、虫粪的重量和玉米粒的重量。我们的数据证实，温度在这两个物种的竞争中起着关键作用；无论是否存在另一个物种， 似乎在较高温度（30°C）下表现更好。此外，本研究的结果表明， 在所有组合中产生的后代都比 少。考虑到竞争的结果，我们假设大部分的玉米粒损坏是由于 取食造成的。基于这些数据，我们推断， 在新的储存玉米地区，即使存在 ， 作为一种入侵物种也具有竞争优势。
