筑後におけるコブノメイガの早植水稻への飛来

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The appearance of Cnaphalocrocis medinalis GUENEE in early planted rice fields was investigated in Chikugo between 1976 and 1979. The leaf tip of rich plants was brushed with a road and the number of the moths which had flown away from the plants was counted every day from June to July, while the numbers of eggs, larvae and pupae on the rice plants were monitored at three or four day intervals. The female moths collected in the field were checked for the number of spermatophores and mature eggs, and the amount of fat. The moth was found in paddy fields from the latter half of June every year and the average number of the moths was usually less than ten individuals per are with the number of females exceeding that of males. The moths found in the fields seemed to move from field to field. Nearly all the female moths had already mated and had mature eggs whenever they were collected in the fields. The noth was usually observed one day ot three days later than the two species of rice pests, Sogatella furcifera HORVATH and Nilaparvata lugens STAL, which are known to be long distance migrant planthoppers. However, when the interval between the landing and the finding of the moth in the field is taken into account, out of nine long distance migratory flights of the planthoppers during the test period, seven were thought to be associated with the moths. These findings strongly suggest that the moth might be a long distance migrant. None of the moths were captured by black light traps in June.
日本応用動物昆虫学会の論文
1981-02-25

筑後におけるコブノメイガの早植水稻への飛来

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