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遮阳网具有遮阳降温、避蚜防病、防雹减灾、增加温度等功效,且成本低、效益高,使用省工省力等特点,在夏季蔬菜生产和秋冬育苗中有着十分广泛的用途。一、遮阳网的种类目前,我国生产的遮阳网按其颜色分,有黑色、白色、银灰色、绿色、蓝色、黄色和黑灰色两色相间的几种;按生产的幅宽分,有90厘米、140厘米、150厘米、160厘米和200厘米5种。二、作用和功效1、防虫、防病毒病。覆盖遮阳网,将害虫和蔬菜隔离,基本上能免除菜青虫、甘蓝夜蛾、蚜虫、白粉虱等多种害虫的危害,控制病毒病的发生。病虫害感染率降低54%—60%。2、降温、保温,有利于出苗。7—8月是永年县
Sunshade has a very wide range of uses in summer vegetable production and autumn and winter nursery with the features of sunshade cooling, avoiding aphids and disease prevention, hail prevention and mitigation, increasing temperature and the like, and has the advantages of low cost, high efficiency, labor saving and labor saving. First, the type of shade net At present, China’s shade net according to their color points, there are black, white, silver, green, blue, yellow and dark gray two-phase and several; according to the production of wide points, there 90 cm, 140 cm, 150 cm, 160 cm and 200 cm. Second, the role and effectiveness 1, pest control, anti-virus disease. Cover the shade net, the insects and vegetables isolated, basically to avoid Pieris rapae, cabbage Lantern, aphids, whitefly and other pests and control the occurrence of the virus disease. Pest infection rate decreased 54% -60%. 2, cooling, heat, is conducive to emergence. July-August is Yongnian County