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小造桥虫又叫棉夜蛾。近年来,它的发生出现了新动向,为害与年俱增。这只常年不大引起人们注意的无名小虫已成为我地棉麻生产的一大障碍。1977年是特大发生的一年,发生量之大,危害之严重,是非常惊人的。7月下旬有的棉花、红麻地一亩有虫几十万到几百万条,一株棉花、红麻上高达几十到上百条;个别田块的红麻变成光杆,下面虫粪有厚厚一层,造成损失较大;我所20瓦黑光灯下8月13日一夜就诱获小造桥虫成虫2,172只,相当于轻发生年份全年总蛾量的几倍或几十倍。为了摸清小造桥虫在我地的发生规律,给予测予报提供资料,及时准确地指导防治,1977年我们对其进行初步研究,现整理如下:
Small bridge worms, also known as cotton worm. In recent years, there has been a new trend in its occurrence, with the harm growing year by year. This perennial little-noticed bug has become a major hurdle to my cotton production. The year 1977 witnessed a grand occasion. It was astonishing that the amount of occurrence and the serious harm it caused were extremely serious. In late July, some cotton and kenaf land have hundreds of thousands of pests, hundreds of millions of pests, and up to tens of dozens of cottons and kenaf. Several kennels turn into polished kennels and insect pest A thick layer, resulting in greater loss; my 20-watt black light on August 13 overnight induced a small bridge parasite adult 2,172, equivalent to the year of light years of total moths several times or dozens of Times In order to find out the occurrence of the small bridge parasite in my place, provide information for the test report, timely and accurately guide the prevention and treatment, we conducted a preliminary study of it in 1977, are now organized as follows: