How to strengthen prevention and cure of vegetable diseases in protected areas?
Diseases in protected areas are proliferating rapidly, and the damage is heavy. It is imperative to implement the policy of “prevention-based comprehensive prevention and controlâ€. The main measures are as follows:
(1) Do a good job of plant quarantine: Plant quarantine is an important measure to prevent the spread of dangerous diseases with vegetable seeds, seedlings, and seedlings. If cucumber scab, tomato canker disease occur in some areas, plant quarantine measures should be strictly implemented to prevent the above-mentioned diseases from reaching the protected area. When dangerous diseases are introduced into new areas, they must be organized to eliminate them completely.
(2) Agricultural control: Combining cultivation and cultivation techniques can also control, eliminate or reduce the occurrence and harm of diseases. For example, the selection of disease-resistant varieties is an important approach to disease prevention and control, and it is also the most economical and effective method; selection of resistant varieties and planting of several varieties with a reasonable layout, to avoid a single species of long-term contiguous planting, protection of enhanced varieties of disease resistance and improved varieties Sex. Strengthen field management, deepen the land, increase organic fertilizers, implement crop rotation, plant plants in a timely manner, clean the worm-shelter, reduce the source of pests and diseases, and reduce the occurrence of pests; strengthen water and fertilizer management, increase plant resistance, and pour After the water is ventilated, flood irrigation is prevented, and water is not poured on cloudy days, which plays an important role in controlling disease occurrence. Adopting means such as ventilation and dehumidification or warming in closed canopies, resulting in temperature and humidity conditions suitable for the growth of whole vegetables and unfavorable to the occurrence and development of diseases, may control the occurrence of diseases and promote the growth of vegetables.
(3) Biological control: The use of biological control methods can reduce the pollution of chemical pesticides, and can also achieve the purpose of treatment and production. Commonly used biological pesticides include "5406" antibiotics, streptomycin, neophytin, agricultural antibiotics 120, 130-10, and Liuyangmycin.
(4) Physical control: physical methods can also prevent vegetable diseases. For example, soaking in warm soup kills germs on the surface of the seeds and internal lurking bacteria; disinfects solar-heated soil, and controls soil-borne diseases such as blight.
(5) Chemical control: The current use of chemical pesticides is still the main means to prevent vegetable diseases. Such as spraying, dusting, smoke, dust, seed dressing, soil disinfection. The use of chemical pesticides is simple and effective. It is welcomed by vegetable farmers.
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