棉花上钝绥螨种群密度及新采集技术研究

Mohamed Mahrous Youssef elshazly
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引用次数: 0

摘要

对埃及棉田无农药条件下的威氏钝绥螨(Amblyseius swisskii athiashenriot)的种群密度进行了观察。种群密度在9月最高,6月最低。植物的中部密度最高,顶部密度最低。叶下侧螨的种群密度显著高于叶上侧螨的种群密度。大多数螨寄生在叶片底部的基部和褶皱处。氯氟氰菊酯(5%)和毒死蜱(48%)对螨数均无显著影响。在无杀虫剂的地区喷洒了一种落叶剂。一周后,最近落叶的螨密度最大。在使用了落叶剂和两种杀虫剂的地区收集了一些最近落叶。当把它们堆在一个玻璃罐里,除了开口外,还用不透明的织物覆盖着,在一个持续照明的实验室里,大多数螨虫聚集在最上面的叶子上。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Population Densities of the Predaceous Mite Amblyseius swirskii on Cotton Plants, and A New Technique to Gather the Mite Individuals
: The population densities of the predatory mite Amblyseius swirskii Athias-Henriot (Acari: Phytoseiidae) were observed in a pesticide-free cotton field in Egypt. The highest population density of was noted in September, whereas the lowest was noted in June. The plant's central section indicated the maximum population density, whereas the plant's top section indicated the lowest population density. The population density of mites found on the undersides of the leaves was significantly higher than that of mites found on the upper sides of the leaves. The bases and pleats of the undersides of the leaves harboured the mite majority. Neither Lambda cyhalothrin (5%) E.C. nor Chlorpyrifos methyl (48%) E.C. had a significant effect on the mite numbers. A defoliant was sprayed in the pesticide-free area. A week later, the recently fallen leaves had the greatest mite population density. A few recently fallen leaves were collected from an area treated with both defoliant and the two pesticides. When they were stacked in a glass jar covered with opaque fabric apart from the opening, in a continuously lit laboratory, the majority of the mites congregated on the topmost leaves.
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