Smoggy and widowed to guard against vegetable diseases

In autumn and winter, cloudy and hazy weather will increase, which will have a great impact on vegetable production. In the field investigation, agricultural technicians found that farmers often use a sloping method to maintain the temperature inside the shed, but at the same time, the humidity in the shed is too large. The low temperature and high humidity environment is an advantageous condition for the occurrence of diseases such as gray mold, and the light intensity is low. Photosynthesis cannot be carried out, resulting in a weak overall crop growth and a decline in flowering results. It is recommended that farmers should prevent the occurrence of vegetable diseases from the following aspects.
1. Light management smog weather should open the mats and quilts every day, let the crops use photosynthesis with weak light; choose the shed film with better light transmission, and clean the shed film in time to enhance the light permeability; The condition can be artificially filled with light by placing a fill light and hanging a reflective screen on the back wall.
2, water management smog weather crop roots weak, low level of metabolism, should not be poured large water, should be watered according to the weather conditions, using membrane drip irrigation to water, strict control of indoor humidity, avoid low temperature and high humidity environment To prevent the occurrence of diseases.
3, fertilizer management smog weather is not suitable for large-scale fertilization, can increase the amount of carbon dioxide gas fertilizer, after the weather turns fine, the amount of water can be sprayed on the foliage and foliar fertilizer, after the crop returns to normal growth and then normal water and fertilizer management.