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广东地处祖国最南方,跨热带和亚热带。海南岛五指山以南四时如夏,水稻全年可正常生长。粤北各县,冬季霜、雪常见,水稻(包括再生稻)不能生存。因此,了解褐稻虱Nilaparvatalugens Stal在广东的冬季分布,对研究其在我国的越冬北界、预测与防治很有帮助。 (一) 从1974年冬开始,我们定点于广州石牌地区进行越冬调查,并在气候特异年份按不同纬度组织有关单位或派出科技人员进行实地考察。如1975年冬至1976年春为广东自1893年以来最寒冷之年,冷冻过后,我们即派出人员从海南岛南端的崖县起至粤北的东昌县逐点进
Guangdong is located in the southernmost part of the motherland, across the tropics and subtropics. Wuzhishan, Hainan Island, south of four as summer, rice can grow normally throughout the year. Counties in northern Guangdong, winter frost, snow is common, rice (including ratooning rice) can not survive. Therefore, it is helpful to understand the winter distribution of Nilaparvatalugens Stal in Guangdong Province, and to study its prediction and control in the overwintering northern boundary in China. (1) Starting from the winter of 1974, we conducted a survey on overwintering in Guangzhou Shipai area. We organized field visits at different latitudes in accordance with different latitudes or dispatched scientific and technological personnel in winter. For example, from the winter of 1975 to the spring of 1976, the coldest year for Guangdong since 1893. After freezing, we dispatched personnel from Ya county in the southern tip of Hainan Island to Dongchang County in northern Guangdong