论文部分内容阅读
多年对小麦蚜虫的系统调查与药剂防治试验结果表明,可以用小麦齐穗期作为生育指标来预报穗期蚜虫的达标期,齐穗期百株蚜量小于100头时(正常年份),期距为15～21d,大于100头时(主要是暖冬年份),期距8～12d。实际防治应根据以上发生情况相应采取“单独治蚜”和“病、虫结合防治”对策。
Years of wheat aphid systemic investigation and chemical control test results show that wheat can be used as a full-fledged growth index to forecast the aphids of the heading date, full heading a hundred aphids less than 100 (normal years), the period For 15 ~ 21d, when more than 100 (mainly warm winter years), the period of 8 ~ 12d. The actual prevention and treatment should be based on the above situation should be taken accordingly “single aphid” and “disease and insect prevention and control” strategy.