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本文报道浙江部分地区二化螟Chilosuppressalis越冬幼虫寄生蜂的主要种类、寄生率以及它们在冬前与冬后的羽化动态。在兰溪 ,寄生蜂对二化螟越冬幼虫的寄生率较低 ,常见种类仅有二化螟绒茧蜂。在安吉与嘉兴两地 ,除二化螟绒茧蜂为主外 ,稻螟小腹茧蜂和中华钝唇姬蜂也较为常见 ,三者对双季晚稻田二化螟越冬幼虫寄生率为 1 8～ 1 9%。明显高于单季晚稻田的寄生率 ( 8～ 1 5%)。 3种寄生蜂的羽化动态有较大差异 ,二化螟绒茧蜂和稻螟小腹茧蜂在进入 1 1月后即不再羽化 ,而中华钝唇姬蜂的羽化则持续到 1 1月中旬之后 ;越冬后 ,后者的羽化时间明显早于前两者
This article reports the main species and parasitism of parasitoids of Chilosuppressalis overwintering larvae in some areas of Zhejiang and their eclosion dynamics before and after winter. In Lanxi, parasitic wasps had a lower parasitism on overwintering larvae of the rice stem borer, and only the most common species were the Chrysalis parasitoid. In the Anji and Jiaxing two, in addition to the main population of Chrysolophus pictus, the Chilo suppressalis and Chrysolophus pictus are also more common, the three pairs of late rice paddy field overwintering larvae of parasitism rate of 18 ~ 19%. Significantly higher than the single-season late rice parasitism (8 ~ 15%). The dynamics of emergence of the three kinds of parasitic wasps were quite different. The emergence of the parasitoid was opposite to that of the first order in January, and the emergence of the genus Laparinae lasts until mid January After; wintering, the emergence of the latter was significantly earlier than the former two