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首页> 外文期刊>Journal of Economic Entomology >Chill-coma and Minimum Movement Temperatures of Stored-Product Beetles in Stored Wheat
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Chill-coma and Minimum Movement Temperatures of Stored-Product Beetles in Stored Wheat

机译：储存小麦中甲虫的冷昏迷和最低运动温度

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摘要

The minimum temperature at which stored-product insects can move inside stored grain bulks with different grain moisture contents is not known. The movement of adults of four stored-product insects, Cryptolestes ferrugineus (Stephens), Tribolium castaneum (Herbst), Sitophilus oryzae (L.), and Sitophilus zeamais (Motschulsky), at low temperatures inside jars or bulks of wheat with 11.1 or 16.0% moisture content was measured. Spontaneous walking stops (SMh), CCT (no movement after shaken), and minimum movement (TMmin, caught in probe pitfall traps) temperatures were determined at stepped-decrease of temperature. The ranges of SMh, CCT, and TMmin temperatures of the four stored-products beetles were 4.0 to 9.0A degrees C, 2.0 to 8.0A degrees C, and 6.0 to 11.5A degrees C, respectively. The TMmin was similar to 3A degrees C higher than the SMh for all the tested beetles. C. ferrugineus had the lowest SMh, CCT, and TMmin temperatures, whereas S. zeamais had the highest values of these determined temperatures. C. ferrugineus under a faster stepped-decrease of temperature had higher SMh, CCT, and TMmin temperatures than that under a slower stepped-decrease of temperature, while adults of T. castaneum were not influenced by the temperature decrease rate. The two species of Sitophilus did not survive to the end of the experiment at the faster stepped-decrease of temperature. Two grain moisture contents did not affect these determined temperatures for all tested species.
机译：储藏物昆虫可以在具有不同谷物水分含量的谷物谷粒内部移动的最低温度是未知的。在低温下，在装有11.1或16.0的小麦罐或大块小麦中，四种贮藏昆虫的成年昆虫：Cryptolestes ferrugineus（Stephens），Castolum Tristanium（Herbst），Sitophilus oryzae（L.）和Sitophilus zeamais（Motschulsky）。测量了％水分含量。在逐步降低温度时，确定了自发行走停止（SMh），CCT（摇动后无运动）和最小运动（TMmin，陷在探头陷阱陷阱中）的温度。四个储藏甲虫的SMh，CCT和TMmin温度范围分别为4.0至9.0A摄氏度，2.0至8.0A摄氏度和6.0至11.5A摄氏度。对于所有测试的甲虫，TMmin均比SMh高3A摄氏度。 Ferrugineus的SMh，CCT和TMmin温度最低，而玉米的这些确定温度最高。在较慢的温度阶跃降低下，铁锈衣藻的SMh，CCT和TMmin温度较高，而较慢的温度下降速率较慢。在快速逐步降低温度的情况下，这两种Sitophilus不能存活到实验结束。对于所有测试物种，两种谷物的水分含量均不会影响这些确定的温度。

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