论文部分内容阅读
棉蓟马又名烟蓟马,是襄阳棉区主要苗期害虫之一,自1956年大量发生为害之后,相于1960、61、62年连续大发生,特别是在春旱少雨的1961年,为害更为严重。棉苗受害之后,轻则子叶焦枯、真叶卷缩,重则形成无头棉株,发生疯长。因此,消灭蓟马为害,是棉花全苗、壮苗的重要措施之一。现将几年调查研究的一些结果,加以整理,供参考。 一、发生与消长情况 1.冬季寄主及虫态:据1962年2月分3次调查,冬季寄主以葱、蒜为主,韮菜上亦有少量发现。由于葱、蒜衰老迟早不同,其不消长情祝亦各异。山东大葱成熟较早,蓟马虫口上升较快,消长较早,而
Thrips tabaci, also known as Thrips tabaci, is one of the main seedling stage pests in the Xiangyang cotton area. Since 1956, a large number of pests have been killed and the occurrence occurred successively in 1960, 61 and 62 years. Especially in the spring of 1961, Damage is more serious. Cotton seedlings suffer, ranging from scorched cotyledons, leaf curl really, while the formation of headless cotton plant, the occurrence of soaring. Therefore, the elimination of thrips harm, is one of the important measures of cotton seedlings, strong seedlings. Now a few years of some of the results of the investigation and study, to be collated for reference. First, the occurrence and growth and decline 1. Host and insect state in winter: According to the investigation in February 1962, 3 times, the winter host to onion, garlic-based, there are a small amount of leeks found. As onions, garlic aging sooner or later different, its long-awaited wishes are different. Shandong onion early mature, thrips mouth rapid rise, growth and decline earlier