论文部分内容阅读
小麦吸浆虫虫态复杂,有休眠体(圆茧),有幼虫.还有长茧和裸蛹,裸蛹可镜检分为前蛹、初蛹,中蛹和后蛹4级,而长茧中的情况就比较复杂,除有各级蛹外,还有幼虫,要准确分辨,必须镜检解剖(去茧皮)观察。费工费时,长茧多时,不可能全部观察,裸蛹数量太多时也不可能全部镜检,这样发育进度就不好计算准确,给预测预报也带来一定的困难。为此我们在实际工作中设计了一个计算公式,用抽样检查,再经过公式换算就快得多了。具体做法是:将每次每地淘出的虫按圆茧、活动幼虫、长茧和裸蛹分别记载,当长茧、裸蛹数少于30头时,全部镜检多于30头时,从中抽样解剖观察30—50头,然后除去圆茧按下面的
Synechocystis obliquus is complex, with dormant body (cocoon), larvae, long cocoon and naked pupae, naked pupae can be classified into pre-pupal, primary pupae, mid-pupae and post-pupa.4. The situation is more complex, in addition to pupate at all levels, there are larvae, to accurately distinguish, we must microscopic examination (to the cocoon skin) observation. When the labor cost is long and the cocoon is prolonged, it is impossible to observe all of them. When the number of naked pupae is too large, it is impossible to carry out all microscopic examination, so that the progress of development is not good and the calculation is accurate, which also brings certain difficulties to forecasting and forecasting. To this end, we have designed a calculation formula in practical work, using sampling inspection, and then through the formula conversion is much faster. The specific approach is: each will be scouring the worm per cocoon, the activities of larvae, cocoon and naked pupae were recorded, when the cocoon, the number of naked pupae less than 30, all the microscopic examination of more than 30, Sampling from 30-50 Anatomy observation, then remove the cocoon according to the following