ハダニ類の吐糸行動の解析 : II.ナミハダニTetranychus urticae KCOHの吐糸過程と温・湿度条件を異にした場合の吐糸行動
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概要
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The process of silk secretion by T. urticae was observed under one or two hundredfold magnification. The webbing of each active stage (except quiescent stages) and adult of T. urticae was examined under constant temperature with three different relative humidity conditions. The webbing produced by the ovipositing female was also examined at 2 day intervals for 16 days under constant temperature and humidity conditions. Furthermore, the webbing of the newly emerged female was investigated under six different temperatures and five different humidities. These experiments were conducted on red clover leaves by use of the methods mentioned in a previous paper (SAITO, 1977). The observations showed that the mite secretes threads through the palpus in the process of walking. It was indicated that all stages of the mite were producing silk and the amount of webbing increased from stage to stage. The distribution of the silk threads per square suggested the adult male had a characteristic pattern of webbing. The number of eggs deposited by the female, the amount of webbing and the number of fecal pellets in 16 days showed parallel relationships. The results under various physical conditions demonstrated that the amount of webbing increased with temperature rise, but the pattern of increase did not appear to have a linear trend. The webbing was affected by changes of relative humidity. The amount of webbing showed a peak at 33% RH, and decreased gradually at lower or higher humidities.
- 日本応用動物昆虫学会の論文
- 1977-09-25
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