大麦散装谷物中昆虫的位置

G. A. Zakladnoy
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引用次数: 0

摘要

为了减少储粮的损失,重要的是在感染的早期阶段发现其中的昆虫,为此了解它们的首选栖息地非常重要。本研究的目的是了解粮食顶层昆虫的分布情况,并在企业采集样本以估计虫害情况。在对某大麦粒进行5次重复取样的过程中,对害虫种类和数量进行了鉴定和统计。在采样点测定温度。大颗粒上方的空气温度为- 2°С ~ 0°С。在0-28 cm、28-56 cm和56-84 cm的土层中,平均温度分别为9、14和18°C, p = 0.05的置信限分别在5-13、8-20和12-24°C以内。三个平均值的置信限重叠,证明平均温度的差异在统计上不显著。在粮食样品中发现了三种昆虫。稻谷象甲虫在温度较高的谷粒层中聚集数量较多。根腐菌仅存在于籽粒最温暖的底层。在第二深的籽粒层中,嗜脂细胞的数量最多。研究发现,在温度较高的谷粒层中,这三种成虫的拥挤程度有所增加。
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Location of insects in a barley bulk-grain
In order to reduce the loss of stored grain, it is important to detect insects in it at the early stages of infection, for which it is important to know their preferred habitats. The purpose of the current study was to gain knowledge about the distribution of insects in the top layer of grain, from which samples are taken at enterprises to estimate pest infestation. In the samples taken in five repetitions from a barley bulk-grain stored in a granary, there were identified and counted pest species and their number. The temperature was determined at the sampling sites. The air temperature above the bulk-grain was from minus 2 °С to 0 °С. In layers with a depth of 0–28 cm, 28–56 cm, and 56–84 cm at a mean temperature of 9, 14 and 18°C, respectively, the confidence limits at p = 0.05 were within 5–13, 8–20 and 12–24 °C, respectively. The confidence limits of all three means have overlapped, proving that the difference in mean temperatures is not statistically significant. There have been found three species of insects in grain samples. Beetles Sitophilus oryzae clustered in greater numbers in grain layers where the temperature was higher. Rhizopertha dominica was found only in the warmest bottom layer of the grain. Liposcelis bostrychophila was concentrated in the greatest amount in the second deepest grain layer. There has been found an increase in the crowding of adults of all three species in grain layers with a higher temperature.
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