三化螟是我省水稻上的主要害虫之一,每年都造成不同程度的螟害损失。为了做到“巧、准、狠、省”地消灭和控制螟害,必须作好予测予报工作。1964年以来,我们应用三化螟蛹分级法,试行简化予测,先后在昆明、玉溪、开远、文山、楚雄、通海等地区测报各代三化螟发生期,指导药剂防治,取得一定成效。各地测报实践结果表明:此法适于滇中两代螟害区,也适用于滇南三代螟害区;可测报第一代,也可测报二、三代;并能测报盛蛾期、高峰期和各小高峰出现日期以及蚁螟盛孵期。具有方法简便、测报准确、节省人力和时间等优点,从而提高药剂治螟和 Borer borer is one of the main pests on rice in our province, each year to cause different degrees of stem borer damage. In order to eliminate, control and control pests and diseases at the “clever, accurate, relentless and provincial” level, they must be ready to be tested. Since 1964, we applied the grading method of the three yellow rice borer pupal, tentatively simplified test, successively in the Kunming, Yuxi, Kaiyuan, Wenshan, Chuxiong, Tonghai and other regions reported the occurrence of each generation of stem borer, to guide the chemical control and achieved some success . The results of survey and measurement in various places show that this method is suitable for the two generations of boreal damage areas in Yunnan and also for the third generation of stem borer damage areas in southern Yunnan. The first generation and the second and third generation can also be measured; And the emergence of small peak date and ant borer incubation period. The method has the advantages of simple and convenient method, accurate reportage, manpower saving, time saving, etc.,