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白翅叶蝉(Thaia subrufa Motschulsky)在浙江省东阳县,一年大部发生二代。第一、二代成虫分别于6月下旬至7月上、中旬和8月下旬至9月中旬盛发于早稻和双季晚稻,第二代成虫大部分越冬,少数早发的才能发生第三代。第一、二和三代卵历期分别为17—19、11—12和15一19天,若虫历期分别为19、16和24天。成虫4℃开始活动,10℃开始取食,15℃开始羽化和产卵。卵开始发育温度在20℃左右。成虫无孤雌生殖现象,产卵前期在第一、二代分别为23和17天,越冬成虫则长达6—8月之久。每雌产卵量以越冬代最高,以后各代急剧下降。越冬后成虫在4月下旬几乎全部集中于早、中稻秧田,产卵盛期在5月即早稻本田分蘗期。繁殖寄主仅限于水稻。 因白翅叶蝉具有这些生物学特性,所以防治适期为早季秧田。1964—1965年在东阳县早季秧田大面积防治结果,可减低早、中稻本田虫口90％以上,且能压低双季晚稻田的虫口密度。
White-winged leafhopper (Thaia subrufa Motschulsky) in Dongyang County, Zhejiang Province, most of the year for two generations. The first and second generation adults were found to germinate in early morning rice and double season late rice from the middle of June to the middle of July and the middle of August and the middle of August to the middle of September respectively. Most of the second generation adults overwinter, generation. The first, second and third generation of ova were 17-19, 11-12 and 15-19 days, respectively, and the nymphs were 19, 16 and 24 days respectively. Adults started activities at 4 ℃, feeding started at 10 ℃, emergence and oviposition at 15 ℃. Eggs begin to develop at temperatures around 20 ° C. Adult without parthenogenesis, pre-oviposition in the first and second generation were 23 and 17 days, overwintering adult as long as 6-8 months. The fecundity of females per females was the highest in the overwintering generation, and the descendants declined sharply thereafter. After overwintering, adults in late April almost all concentrated in early rice seedling, spawning peak in May that early rice Honda tillering stage. Breeding host is limited to rice. Because of the biological characteristics of the white-winged leafhopper, so the control of early maturity suitable for seedling. Large-scale control of early-season seedling in Dongyang County from 1964 to 1965 could reduce over 90% of the early and mid-stage Honda pests and could depress the population density of insect pests in the double-season late rice fields.