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赤眼蜂长效蜂卡(以下简称长卡)与现行蜂卡(以下简称普卡)的主要区别: 1.田间放蜂只需一次,而现行蜂卡则需放蜂3—4次。 2.在田间能保持每天分批出蜂,维持半月左右,而现行蜂卡是一批出蜂,仅维持1—2日。 3.能保温防雨,在田间较长时间发挥治虫作用,而现行蜂卡不能防雨,1、2日内即失效。 由于普卡本身存在的缺陷,往往在实际工作中,不易为广大贫下中农所掌握,以致延误防治害虫的有利时机,而造成防治效果不理想或失败。这样的事例并不少。为了解决这些矛盾和困难,我们试制成功一种长卡。
Trichogramma long-term bee card (hereinafter referred to as the long card) and the current bee card (hereinafter referred to as Puka) the main difference: 1. Bee put in the field only once, and the current bee card you need to put bee 3-4 times. 2. In the field can be kept in batches every day bees, for about half a month, and the current bee is a group of bees, only for 1-2 days. 3. To heat rain, a long time in the field to play a role in pest control, and the current bee card can not rain, 1, 2 days that is invalid. Due to the defects of Puka itself, it is not easy for the majority of poor peasants and middle peasants to grasp in actual work, which delays the favorable opportunity of prevention and control of pests and results in unsatisfactory or unsuccessful prevention and control. There are not many such examples. In order to solve these contradictions and difficulties, we successfully trial a long card.