イネカメムシの生態に関する研究 : V. 孵化および卵, 幼虫(令)期間について
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概要
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Observations were made on the means of hatch, the periodical variation of the number of hatching of egg masses, percentage of hatch, and the length of egg and larval stages of the rice stinkbug, Lagynotomus assimulans DISTANT from l951 to l953 with the following results. 1. According to the three years' observations the time required to hatch ranged from 2.5 to 9.5 days, with an average of 5.2 days at a mean temperature of 27.9℃ from the beginning to the middle of August. At the hatch, a black stringy triangular appendage on the abdomen supports the body and helps the larva to crawl out of the egg shell. The percentages of hatch of 60 egg masses at each five hours of day such as 1〜6 A. M., 7〜12 A.M., 1〜6P.M. and 7〜12P.M. were 56.6,21.6,10.0 and 11.6 percent respectively. In most of the egg masses, over 80 percent of eggs hatched and no parasitized egg was found. 2. The study on larvae. was successful only in August of l953 because of the difficulties in rearing. The larva passes five instars, and each period from 1st to 5th instar ranged as 2.5〜4.5 2.5〜8.5,2.5〜9.5,6.5〜13.5 and 11.5〜17.5 days successively. The average of the days required for each instar were 3.2,5.0,5.2,10.1,and 13.7 days in male, and 3.1,4.8,5.5,9.8 and 13.5 days in female. No significant difference, therefore, was observed in the period of same instar between sexes under the same condition. The mean larval period was 36.5 days in male and 35.9 days in female under the mean temperature of 22.1℃ from the middle of August to the end of September.
- 日本応用動物昆虫学会の論文
- 1957-06-30
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- イネカメムシの生態に関する研究 : V. 孵化および卵, 幼虫(令)期間について