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防虫网选择,这些你都注意了吗!
网址:https://www.shengjiewangye.com    发布时间:2019-12-04
  防虫网看起来像纱窗一样,具有很多优点,比如:过滤紫外线,耐热、耐水、抗老化、抗腐蚀等等。无毒无味,使用寿命长,最长使用寿命可达10年。
  Anti insect nets look like screen windows. They have many advantages, such as filtering ultraviolet rays, heat resistance, water resistance, anti-aging and corrosion resistance. Non toxic, tasteless, long service life, up to 10 years.
果树防虫网,防虫网厂家
  一、温室大棚安装防虫网十分有必要,它能起来四方面的作用:
  I. It is necessary to install insect proof net in greenhouse, which can play four roles:
  1、能有效防虫。覆盖防虫网后,基本上可免除菜青虫、小菜蛾、蚜虫等多种虫害。
  1. It can effectively prevent insects. After covering the insect control net, it can basically avoid the damage of cabbage moth, Plutella xylostella, aphid and other pests.
  农产品覆盖防虫网后可以有效的免除菜青虫、小菜蛾、甘蓝夜蛾、斜纹夜蛾、黄曲跳甲、猿叶虫、蚜虫等多种害虫的为害。据试验,防虫网对白菜菜青虫、小菜蛾、豇豆荚螟、美洲斑潜蝇防效为94-97%,对蚜虫防效为90%。
  After the agricultural products are covered with insect control net, they can effectively avoid the damage of various pests such as cabbage worm, Plutella xylostella, cabbage armyworm, Spodoptera litura, yellow flea beetle, simian leaf worm, aphid and so on. According to the experiment, the control effect of insect control net on cabbage, Plutella xylostella, cowpea pod borer and Liriomyza sativa is 94-97%, and the control effect on aphid is 90%.
  2、可以防病。病毒传播会给温室大棚种植带来灾难性的后果,特别是蚜虫传毒。但温室大棚安装防虫网后就切断了害虫传毒途径,大大减轻了病毒病的发病率,防效为80%左右。
  2. It can prevent diseases. The spread of virus will bring disastrous consequences to greenhouse planting, especially aphid transmission. However, after the installation of insect control net in greenhouse, the way of insect transmission was cut off, which greatly reduced the incidence of virus disease, and the control effect was about 80%.
  3、调节气温、土温和湿度。在炎热的季节,用白色防虫网覆盖温室大棚,试验表明:炎热的7-8月,在25目白色防虫网中,早晨和傍晚的气温与露地持平,而晴天中午比露地低1℃左右。早春3-4月,防虫网覆盖棚内比露地气温高1-2℃,5厘米地温比露地高0.5-1℃,能有效地防止霜冻。此外防虫网可阻挡部分雨水落入棚内,降低田间湿度,减少发病,晴天能降低大棚内的水分蒸发量。
  3. Adjust the temperature, soil temperature and humidity. In the hot season, the greenhouse is covered with white insect net. The experiment shows that in the hot July August, in the 25 mesh white insect net, the air temperature in the morning and evening is the same as that in the open ground, while in the sunny day, it is about 1 ℃ lower than that in the open ground at noon. From March to April in early spring, the air temperature in the shelter covered with insect net is 1-2 ℃ higher than that in the open ground, and the ground temperature of 5cm is 0.5-1 ℃ higher than that in the open ground, which can effectively prevent frost. In addition, the insect net can prevent part of rainwater from falling into the shed, reduce the field humidity, reduce the incidence of disease, and reduce the evaporation of water in the shed on a sunny day.
  4、有遮光效果。夏季光照强度大,强光会抑制蔬菜营养生长,特别是叶菜类蔬菜,而防虫网可起到一定的遮光作用,20-22目银灰色防虫网一般遮光率在20-25%。
  4. It has shading effect. In summer, the intensity of light is strong, and the strong light can inhibit the growth of vegetables, especially leafy vegetables, while the insect net can play a role in shading. The shading rate of 20-22 mesh silver gray insect net is generally 20-25%.
  需要注意的几个问题
  Some problems to be paid attention to
  当前很多菜农使用的是30目的防虫网,而还有一些菜农使用的是60目的防虫网。同时,菜农使用的防虫网颜色也有黑色、咖啡色、白色、银色、蓝色好几种,那么选用什么样的防虫网合适呢?
  At present, many vegetable farmers use 30 purpose insect control nets, while others use 60 purpose insect control nets. At the same time, vegetable farmers also use insect screen colors of black, coffee, white, silver and blue, so what kind of insect screen is suitable?
  首先,根据所要预防的害虫合理选用防虫网。例如,秋季很多害虫开始向棚内转移,尤其是一些蛾类及蝶类害虫,由于这些害虫的体形较大,菜农可以使用目数相对较少的防虫网,如30-60目的防虫网。但是对于棚外杂草较多,粉虱较多的,要根据粉虱的较小体型,防止其从防虫网的孔眼中进入,建议菜农使用较密的防虫网,如40-60目的。
  First of all, the insect control net should be selected reasonably according to the pests to be prevented. For example, in autumn, many pests begin to move to the shed, especially some moths and butterflies. Because of the large size of these pests, vegetable farmers can use a relatively small number of insect control nets, such as 30-60 mesh insect control nets. However, if there are more weeds and whiteflies outside the shed, it is necessary to prevent them from entering the holes of the insect control net according to the smaller body size of whiteflies. It is suggested that vegetable farmers use a dense insect control net, such as 40-60 purpose.
  其次,根据不同需要选择不同颜色的防虫网。因为蓟马对蓝色有很强的趋性,使用蓝色防虫网容易将棚外的蓟马吸引到大棚周围,一旦防虫网覆盖不严就会使大量的蓟马进入棚中造成危害;而使用白色防虫网,大棚内就不会发生这种现象,而与遮阳网配合使用时,以选择白色为宜。还一种银灰色防虫网对蚜虫有较好的拒避作用,黑色防虫网遮阴效果显著,冬季、连阴天不适宜使用。您可根据实际使用需要来选择。
  Secondly, choose different colors of insect nets according to different needs. Because thrips have a strong tendency to blue, it is easy to attract thrips outside the shed to the surrounding of the shed by using the blue insect net. Once the insect net is not covered tightly, a large number of thrips will enter the shed and cause harm; and when using the white insect net, this phenomenon will not occur in the shed, and when used in combination with the sunshade, it is appropriate to choose white. Another kind of silver grey insect net has a good repellent effect on aphids. The black insect net has a significant effect on shading, which is not suitable for use in winter and even cloudy days. You can choose according to the actual use needs.
  一般春秋季节和夏季相比,温度较低,光照较弱,宜选用白色防虫网;夏季为了兼顾遮阳、降温,宜选用黑色或银灰色防虫网;在蚜虫和病毒病发生严重的地区,为了驱避蚜虫、预防病毒病,宜选用银灰色防虫网。
  Generally, in spring and autumn, compared with summer, the temperature is lower and the light is weaker, so the white insect net should be selected; in summer, in order to give consideration to shading and cooling, the black or silver gray insect net should be selected; in areas where aphids and virus diseases are serious, the silver gray insect net should be selected to drive away aphids and prevent virus diseases.
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