天气渐冷,各种病菌和害虫会随着花卉被带进温室和大棚。因此,必须及时防治。首先花卉未进室前,棚要做到彻底大扫除,门窗全开几天,让阳光直接晒进室、棚内,进行自然消毒,然后再放置花卉。注意盆株不能摆放太密,氮 The weather is getting cold, a variety of germs and pests will be brought into the greenhouse and greenhouse with the flowers. Therefore, we must take timely control. First of all flowers are not in the room, the shed to be thoroughly cleaned, doors and windows open for a few days, let the sun directly into the room, shed, for natural disinfection, and then place the flowers. Note that the pot can not be placed too dense, nitrogen