コナダニ類の繁殖条件の研究 : XV. 個別飼育のイエニクダニ Glycyphagus domesticus (De Geer, 1778) の発育に及ぼす温度, 湿度の影響

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Adopting the individual rearing method, the present study was carried out to observe the effect of temperatures ranging from 0 to 30℃ at intervals of 5℃ and a graded series of relative humidity from 64% up on the life cycle of Glycyphagus domesticus. Relative humidity was regulated using saturated salt solutions, NH_4NO_3 (64.5-69.1% RH), NaCl (74.7-76.0% RH), KCl (80.6-87.3% RH) and KNO_3 (91.4-93.5% RH) and water (94.0-100.0% RH). The diet was a mixture of dry yeast powder and fish meal powder in the same ratio by weight. At 30℃ and 91.5% RH or 80.6% RH, the eggs did not hatch. At 10℃ and 100.0% RH, egg hatchability was maximum. The molting rates from egg to adult were high with combinations of low temperatures and high relative humidity and low at high temperatures (above 20℃). The rate of emergence of hypopi increased as the temperature rose and the humidity decreased. At 5℃ and 87.1% RH there was high molting rate to adults, the same as at 10℃, but the life cycle was prolonged (about 130 days). At 0℃ and 81.9% RH, the eggs did not hatch until 127 days, but were hatchable. The minimum time required to develop from egg to adult was 16.3±1.7 days, at 25℃ and 94.0% RH. The lower temperature and lower relative humidity prolonged the duration of development from egg to adult. The maximum average number of eggs laid by one female, 118.7±23.3,occurred at 15℃ and 87.3% RH. The maximum reproduction index obtained by Miyamoto (1974), 158.7,was at 10℃ and 87.3% RH. The eggs were highly resistant to low temperature. They lived up to 60 days at -10℃ but for only one day at -20℃. The hypopi molted to tritonymphs at 15℃ and both 87.3 and 100.0% RH. Comfortable life conditions for G. domesticus were temperatures of 10 to 15℃ and humidity above 87.3% RH.
日本衛生動物学会の論文
1995-03-15

コナダニ類の繁殖条件の研究 : XV. 個別飼育のイエニクダニ Glycyphagus domesticus (De Geer, 1778) の発育に及ぼす温度, 湿度の影響

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