Multi span greenhouse due to multi span greenhouse's environment is closed, so relative to the open air planting, pest and disease caused by reducing the number of. But we also can not ignore this problem, the following will introduce nine measures to reduce the number of multi span greenhouse pests:

(a) often check the growth of crops, so that we can control the growth of crops. When the plant diseases and insect pests, can know as early as possible. Visits to every corner around the canopy, pay attention to check the back of the leaves, because the back of the leaves are often pests hiding place;

(two) for some special crops, the use of fungicides prevention is necessary. Then we only need a small amount of sterilizing agent can solve the problem, the economic benefits or results;

(three) the pest not only through the feeding damage to plants, but will spread all kinds of plant viruses. The economic will cause considerable loss of insects is flower thrips, thrips available sticky board monitoring of yellow and blue. Monitoring of population density can be aware of the population density of pests and insects in the greenhouse exists.