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粘虫是我县小麦上的一大害虫,摸清其发生规律与气候条件的关系,对其准确测报,正确指导防治,确保小麦稳产高产,具有重要的意义。 1977年春,我们在历年基本上同一地块的20亩麦田里,插小稻草把(每把10根稻草)10个,诱卵。3月中旬初见,3月19日和4月1日分别出现两个产卵高峰,4月26日以后草把上不再见卵,见卵历期共40余天,比历年见卵历期延长半月到20天;共摘卵块204个,相当于历年诱摘卵块数量的6—10倍;产卵期之长,诱摘卵块数量之多,均为历年所未见。据此,我们预报1977年息县小麦上粘虫的发生和危害均属特重年;结果相反,发生和危害则均为特轻年。 1977年第一产卵高峰日(3月19日)及其以前所
Mythimna separata is a major pest on wheat in our county. It is of great significance to find out the relationship between its occurrence and climatic conditions. It is of great significance to accurately report the disease and correctly guide the prevention and cure to ensure stable and high yield of wheat. In the spring of 1977, we inserted 10 small straw bales (10 straw bales) into the 20 acres of wheat fields that were basically the same lot over the years and gave them eggs. Early in March, two spawning peaks appeared on March 19 and April 1, respectively. After April 26, the grass saw no longer see the eggs, and saw more than 40 days in the egg period, which was longer than that in the past years Half moon to 20 days; a total of 204 egg masses, equivalent to 6-10 times the number of eggs lured over the calendar year; long spawning period, the number of lured eggs as many have been seen in the calendar year. Based on this, we predict that the occurrence and harm of the upper armyworm in the county during the year of 1977 are all endemic to the world. In contrast, occurrence and harm are particularly rare. The first peak of spawning in 1977 (March 19) and its predecessor