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防虫网类型繁多,怎么挑选适合的防虫网?
网址:http://www.shengjiewangye.com    发布时间:2019-11-25
  蔬菜大棚防虫网种类繁多,孔眼密度、遮光效果等都有一定的区别,那么我们在选择大棚防虫网的时候应该怎么去挑选适合自己的才是最重要的,下面我们具体了解一下防虫网的作用和选择方法:
  There are many kinds of insect prevention nets in the shed, and the hole density, shading effect and so on are different. So how to choose the right one is the most important thing when we choose the insect prevention net in the shed. Let's have a specific understanding of the function and selection method of the insect prevention net:
蔬菜大棚防虫网
  1能有效防虫
  1 can effectively prevent insects
  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。在夏季安装防虫网,可阻挡烟粉虱、蚜虫等传毒害虫进棚,避免棚室内蔬菜大面积发生病毒病。
  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. In summer, the installation of insect net can prevent the pest such as Bemisia tabaci and aphid from entering the shed, and avoid the large-scale occurrence of virus diseases in the vegetables in the shed.
  2调节棚内温度、湿度及土壤温度
  2. Adjust the temperature, humidity and soil temperature in the shed
  在春秋之际,用白色防虫网进行覆盖,这样可以达到很好的保温效果,能够有效的减轻霜冻带来的影响。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。
  In the spring and Autumn period, the white insect net is used for covering, which can achieve good heat preservation effect and effectively reduce the impact of frost. 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.
  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。
  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.
  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。
  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.
  3阻挡异物进棚
  3. Prevent foreign matters from entering the shed
  在风口下设置防虫网还能够阻挡异物进棚,特别是对于依然使用草帘的菜农来说,每当气温开始升高,风口逐步拉大时,大量的断草掉落到植株叶片上,影响到了植株的生长和叶片的光合作用。在风口处设置防虫网,就能够避免这些不利影响。
  Setting insect net under the tuyere can also prevent foreign matters from entering the shed, especially for the vegetable farmers who still use the straw curtain, when the temperature starts to rise and the tuyere gradually expands, a large number of broken grass falls on the plant leaves, which affects the growth of the plant and Photosynthesis of the leaves. These adverse effects can be avoided by setting insect prevention net at the tuyere.
  4有效预防裂果
  4 effective prevention of fruit cracking
  在冬季,防虫网能够有效预防皴裂果的发生。果实发生皴裂与顶部放风口打开以后,冷风直吹果面有关。因此,在低温季节放风口处安装防虫网,利用致密的网眼,可以将冷风打散,降低冷风的劲头,同时又不影响棚室正常的通风换气。利用防虫网与放风口底部的挡风膜配合,就能够有效预防冷风直吹造成的果实皴裂以及叶片受伤。
  In winter, insect net can effectively prevent the occurrence of chapped fruit. The chapped fruit is related to the cold air directly blowing on the fruit surface after the top vent is opened. Therefore, in the low temperature season, the installation of insect screen at the air vent, using dense mesh, can break up the cold air, reduce the strength of the cold air, while not affecting the normal ventilation of the shed. The use of insect screen and the wind screen at the bottom of the vent can effectively prevent fruit chapping and leaf injury caused by cold wind.
  5有遮光效果
  5 with shading effect
  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%。
  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%.
  如何选择防虫网
  How to choose insect net
  1、在大棚防虫网的选择上,要考虑纱网的目数、颜色和幅宽等
  1. In the selection of insect proof net in the shed, the mesh number, color and width of the net shall be considered
  如果目数太少,网眼偏大,则起不到应有的防虫效果。而且数若是过多,网眼太小,虽能防虫,但通风不良,导致温度偏高,遮光过多,则不利于作物生长。
  If the mesh number is too small and the mesh is too large, it will not have the proper insect control effect. And if the number is too much, the mesh is too small, although it can prevent insects, but the ventilation is poor, resulting in high temperature, too much shading, which is not conducive to crop growth.
  比如,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。
  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.
  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。
  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.
  例如,番茄黄化曲叶病毒(TY)防治过程中最关键的就是选用合格的防虫尼龙纱网。正常情况下防烟粉虱的尼龙纱网有40目就够用。过密的通风不好,定植后棚室里夜间降温困难。但是,目前纱网市场生产出的纱网网孔是长方形的,40目纱网的网孔窄边可达30多目,宽边往往只有20多目,达不到阻挡烟粉虱的要求,所以只能使用50-60目的纱网阻挡烟粉虱。
  For example, the key to the control of Tomato yellow leaf curling virus (TY) is to select qualified insect resistant nylon gauze. Under normal circumstances, 40 meshes of nylon gauze net against Bemisia tabaci is enough. Too dense ventilation is not good, and it is difficult to cool down in the shed at night after planting. However, at present, the screen mesh produced in the screen market is rectangular, the narrow side of 40 mesh screen can reach more than 30 mesh, and the wide side often only has more than 20 mesh, which can not meet the requirements of preventing Bemisia tabaci, so only 50-60 mesh screen can be used to block Bemisia tabaci.
  春秋季节温度较低,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。
  In spring and autumn, the temperature is low and the light is weak, so the white insect net should be used. In summer, in order to protect the sun and cool down, black or silver grey insect net should be used. In the areas where aphids and virus diseases are serious, in order to drive away aphids and prevent virus diseases, silver grey insect control net should be selected.
  2、选用防虫网时,还要注意检查防虫网是否完整
  2. When selecting the insect net, pay attention to check whether the insect net is complete
  有些菜农反映不少刚买的防虫网都存在破孔现象,因此提醒菜农在购买时应该将防虫网展开,检查防虫网是否存在破孔现象。
  Some vegetable farmers reflect that many newly purchased insect control nets have holes, so remind vegetable farmers to expand the insect control nets when purchasing, and check whether there are holes in the insect control nets.
  防虫网的安装
  Installation of insect net
  1、确保覆盖质量
  1. Ensure coverage quality
  防虫网要全封闭覆盖,四周用土压严实,并用压膜线固定牢固;进出大、中棚和温室的门,必须注意进出后随即关好。小拱棚防虫网覆盖栽培,棚架高度要明显高于作物,避免菜叶紧贴防虫网,以防害虫由网外采食或产卵于菜叶。
  The insect prevention net shall be completely closed and covered, and all around shall be compacted with soil, and fixed firmly with membrane pressing line; the doors to and from large, medium and greenhouse must be closed immediately after entering and leaving. The height of the canopy should be higher than that of the crops, so as to prevent the vegetable leaves from clinging to the insect net, so as to prevent the pests from eating outside the net or laying eggs on the vegetable leaves.
  例如防治TY时,番茄的整个种植期间要处于防虫网的保护下。棚室的上、下风口,后墙的通风口,出入口两道门,都应用防虫网封住。尤其是操作间的两道门,有人员出入时必须及时地将纱门帘回放到位。
  For example, when controlling ty, tomato should be protected by insect net during the whole planting period. The upper and lower air outlets of the shed, the air vents of the back wall and the two doors of the entrance and exit shall be sealed with insect proof nets. Especially for the two doors in the operation room, the screen curtain must be played back in place in time when there are people in and out.
  用于放风口封闭的防虫网,与透明覆盖物间不能留有缝隙,以免给害虫留出进出通道。随时检查、修补防虫网上的孔洞和缝隙。
  There should be no gap between the net and the transparent cover, so as to avoid leaving access for the pests. Check and repair the holes and gaps in the insect screen at any time.
  2、灭虫处理
  2. Pest control
  种子、土壤、塑料棚或温室骨架、架材等都有可能带有害虫和虫卵。在防虫网覆盖后至种植蔬菜前,一定要对种子、土壤、棚室骨架、架材等进行灭虫处理,这是确保防虫网覆盖栽培效果的关键环节。
  Seeds, soil, plastic shed or greenhouse skeleton, frame material, etc. may contain pests and eggs. From the cover of insect control net to the planting of vegetables, the seeds, soil, the framework of the shed, frame materials, etc. must be exterminated, which is the key link to ensure the effect of the cultivation of insect control net.
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