Population dynamics of Tribolium castaneum (Coleoptera: Tenebrionidae) in wheat and in wheat mixed with cracked wheat held in different types of containers

生物 红粉甲虫 人口 小麦粒 小麦面粉 农学 含水量 动物科学 园艺 毒理 幼虫 植物 食品科学 人口学 社会学 岩土工程 工程类
作者
Bhagya Jagadiswaran,Digvir S. Jayas,Fuji Jian
出处
期刊:Journal of Economic Entomology [Oxford University Press]
卷期号:117 (1): 323-332 被引量:1
标识
DOI:10.1093/jee/toad213
摘要

Abstract The population dynamics of Tribolium castaneum (Herbst), red flour beetle, was studied at 30 °C using long vertical columns (LVCs) (150 mm diameter and 1,020 mm long) and shallow containers (SCs) (460 mm long, 660 mm wide, and 150 mm high), containing 14 kg of whole wheat or a diet made of whole wheat and cracked wheat in 19:1 ratio by mass. The moisture content of the wheat or mixed diet was 14.5% (wb). Every 4 wk and up to 24 wk the live and dead adults were counted in the SCs or in each section of the LVCs. Each LVC was separated into 10 equal sections before removing grain from the LVC. After counting, the grains were incubated at 30 °C and 70% RH for 4 wk, and emerged adults after re-incubation were counted as offspring. The adults and offspring were mainly concentrated in the top section of the LVCs, which could be due to higher mortality in the lower sections and preference of T. castaneum for the surface of grain bulk. The diet influenced the population, and the insects developed better in the cracked wheat-based diet. Greater surface area of the container increased the multiplication and/ or survival of T. castaneum and insects inside SCs with larger surface area and with cracked wheat-based diet, had quicker population increase rate and larger carrying capacity than LVCs.
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