防蟲(chóng)網(wǎng)覆蓋法
漂浮覆蓋不僅能有效地防止斜紋夜蛾和甜菜夜蛾的為害，而且能有效地防止風(fēng)暴，減少葉片的傷害。
采用小棚蓋是現(xiàn)在實(shí)施較多的遮蓋方法。小棚的形狀隨邊界的寬度而變化。它可以做成小平房或小拱形棚。該方法投資少，易于實(shí)施，可從棚外灑水。
溫室里蓋著大棚，全封閉，蓋上防蟲(chóng)網(wǎng)，蔬菜在里面種植。從種植到收獲，蚊帳沒(méi)有被移除，殺蟲(chóng)劑也沒(méi)有或更少被噴灑。操作也很方便。
如何使用防蟲(chóng)網(wǎng)
覆蓋前應(yīng)進(jìn)行土壤消毒和化學(xué)除草，這是防蟲(chóng)網(wǎng)栽培的重要配套措施。必須殺滅殘留在土壤中的細(xì)菌和害蟲(chóng)，阻斷害蟲(chóng)的傳播途徑。用小拱棚覆蓋栽培蔬菜時(shí)，拱棚的高度應(yīng)高于蔬菜的高度，以防止樹(shù)葉粘在防蟲(chóng)網(wǎng)上，使網(wǎng)外害蟲(chóng)吃了葉，在葉上產(chǎn)卵。隨時(shí)檢查防蟲(chóng)網(wǎng)的破損情況，及時(shí)堵塞漏洞和縫隙。
沒(méi)有必要通過(guò)覆蓋整個(gè)生長(zhǎng)期來(lái)覆蓋整個(gè)生長(zhǎng)期。一般在5-6級(jí)大風(fēng)時(shí)，不必按線，以免被風(fēng)卷起。
根據(jù)蔬菜種類和栽培季節(jié)，選擇網(wǎng)的寬度、直徑、直徑和顏色。同時(shí)，最重要的是光圈。如果網(wǎng)目過(guò)小，網(wǎng)目過(guò)大，網(wǎng)目小，防蟲(chóng)效果好，但遮光過(guò)多，不利于蔬菜生長(zhǎng)。一般來(lái)說(shuō)，30目比較合適。
當(dāng)空氣溫度較高時(shí)，網(wǎng)內(nèi)溫度高于網(wǎng)外溫度。因此，7～8月氣溫特別高時(shí)，可增加澆水次數(shù)，以濕降溫。
Covering method of insect proof net
Floating surface covering can not only effectively prevent the damage of Spodoptera litura and beet armyworm,but also prevent the storm and reduce the damage of leaves.
The use of small shed cover is now the implementation of the application of more cover up methods.The shape of the small shed varies with the width of the border.It can be made into a small flat shed or a small arched shed.This method has less investment and is easy to carry out,and can spray water from outside the shed.
The greenhouses are covered with greenhouses,all closed and covered with insect proof nets,and vegetables are cultivated in them.From planting to harvesting,the nets are not removed,and no or less pesticides are sprayed.The operation is also convenient.
How to use insect proof net
Soil disinfection and chemical weeding should be carried out before covering up,which is an important supporting measure for the cultivation of insect control nets.It is necessary to kill the bacteria and pests remaining in the soil and block the transmission path of pests.The height of the arch shed should be higher than the height of the vegetable when the small arched shed is used to cover the cultivated vegetables,so as to prevent the leaves from clinging to the insect proof net,so that the pests outside the net can eat the leaves and lay eggs on the leaves.Check the damage status of the insect proof net at any time and plug the loopholes and gaps in time.
It is not necessary to cover the whole growth period by covering the whole growth period.In general,it is not necessary to press the line in case of 5-6 strong wind,so as to avoid being lifted by the wind.
According to the type of vegetables and cultivation season,the width,diameter,diameter and color of the net should be selected.In the meantime,the most important is the aperture.If the mesh size is too small,the mesh size is too large and the mesh size is small,the pest control effect is good,but the shading is too much,which is bad for the growth of vegetables.Generally,30 mesh is more suitable.
When the air temperature is high,the temperature inside the net is higher than that outside the net.Therefore,when the temperature is particularly high from July to August,the frequency of watering can be increased to cool the temperature by wet.
