论文部分内容阅读
在云南省中部高山峡谷地区,七星瓢虫Coccinella septempunctata L.的发生盛期随着当地温暖的气候转移而转移。春天气温由低海拔向高海拔逐步回升,七星瓢虫的发生盛期由低海拔向高山头逐步推迟;秋天气温由高海拔向低海拔逐步下降,七星瓢虫的发生盛期由山头向河谷逐步推迟。另一特点是当地蚜虫发生盛期比瓢虫发生盛期早一个月左右。我们利用这一特点,从1979年起,连续五年,春天从海拔1000米的马龙河谷,人工助迁七星瓢虫到海拔1900米妥甸大队防治小春作物蚜虫。1980年后,曾在妥甸、法裱、雨龙、大庄四个公社部分大队推广。在人工助迁的同时,实行保护七星
The peak of the Coccinella septempunctata L., a ladybird of the ladybird, shifts in the warm mountainous climate in central Yunnan province. In spring, the temperature gradually rose from low altitude to high altitude, and the occurrence of ladybird ladybird gradually lapsed from low altitude to alpine head. In autumn, the temperature gradually decreased from high altitude to low altitude. The occurrence of ladybird ladybird gradually moved from hilltop to valley put off. Another feature is the peak of the local aphid than ladybug peak period of about one month earlier. We use this feature, from 1979 onwards for five consecutive years, spring 1000 meters from the elevation of the Malone Valley artificial removal of Ladybird to 1900 meters above sea level to prevent the small group of sweet potato crop aphids. After 1980, it was promoted in some battalions of the four communes of Daunting, Law Mounting, Yu Long and Dazhuang. In the artificial relocation at the same time, implement the protection of seven stars