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华北棉区防治棉铃虫(Heliothis armigera (Hübner))的传统策略是重点防治第二代、力保伏前桃,经济阈值定为百株棉花l5粒卵或5头幼虫。随着生产条件的变化,这一策略遇到了一些严重的经济生态学问题。为此,中国科学院动物研究所运用系统分析和经济生态学理论,自1980年至1985年在河北省饶阳县和安徽省濉溪县及涡阳县进行了一系列试验研究,提出在产量水平中等以上的棉田,把第二代经济阈值提高约10倍,并辅以合理的人工摘蕾。在1983年和1984年验证结果的基础上,1985年饶阳县全面推广这一新的技术策略,实际应用面积10万亩。1985年第二代棉铃虫大发生,百株累计卵量为557粒,仅施药一次,容许幼虫为害一部分
The traditional strategy for controlling Helicoverpa armigera (Hübner) in North China is to focus on the prevention and control of the second generation, to ensure that the economic threshold is set at 100 l cotton eggs or 5 larvae. As the production conditions change, this strategy has encountered some serious economic problems. To this end, Institute of Zoology, Chinese Academy of Sciences, using systematic analysis and economic ecology theory, conducted a series of experimental studies in Raoyang County of Hebei Province and Suixi County of Anhui Province and Guoyang County from 1980 to 1985, The above cotton field, the second generation economic threshold increased by about 10 times, supplemented by a reasonable artificial extraction bud. Based on the verified results of 1983 and 1984, Raoyang County fully promoted this new technology strategy in 1985 with an actual application area of 100,000 mu. In 1985 the second generation of cotton bollworm occurred, one hundred cumulative egg amount of 557, only once the pesticide, allowing larvae harm part