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Occurrence of insect pests Bemisia tabaci adults in February 21 Dong Dong Dong Dong Dong Dong Dong base investigation 2 Solanaceous vegetable seedlings greenhouses, in the pepper seedbed to see a hundred adult insects, insect population density is relatively low compared to previous years. As the temperature rises and transplanting of eggplant vegetables continues, the insect population will increase rapidly.
Sclerotinia According to a survey conducted on February 18, the rate of disease-causing field disease in lettuce crops in greenhouses reached 10%, and the average diseased plant rate in 4 fields of celery was 1.6%, ranging from 0.3% to 5.1%. In Mei Lizhen’s investigation on February 21, the average diseased rate of four fields of lettuce mulching film cultivation was 1.3%, with a range of 0.7% to 2.2%. The average diseased rate of two fields in greenhouse cultivation was 0.8%, and the range was 0.5% to 1%. 3 times).
According to a survey conducted by Dong Jun on February 21, the average incidence of strains in 3 fields of greenhouse tomato was 10%, ranging from 0 to 20%. The incidence of early-planting plots was controlled, and the symptoms of grey mold in untreated plots were obvious.
Downy mildew mainly damages vegetables, cabbage, lettuce and spinach. According to investigations by Dong Hao and Mei Li on February 21, downy mildew is currently at the initial stage of disease. Greenhouse lettuce is in the middle growth period. It was transplanted three times in the first half of last year. The downy mildew was effectively controlled and the symptoms of the disease were not obvious. The open field lettuce downy mildew was in the sporadic stage of disease, and with the temperature rising, downy mildew will enter. The epidemic period is currently at a critical period of drug prevention.
The prevention and control of prevention and control of Bemisia tabaci in spring is the key to prevention and control throughout the year. The first is to cultivate insect-free seedlings and transplant them with pesticides to eliminate pests in the seedbed. The second is to do a clean job before transplanting. Thirdly, Solanaceae vegetables were promptly investigated after being transplanted. It was found that when the worms reached 2 to 3 heads, they were used for drug prevention and treatment. Each farmland used 52.25% chlorinated chlorpyrifos emulsion 50 ml plus 3% acetamiprid EC 40 ml per acre. Add 50 kg of water spray.
Attach importance to disease prevention work and strengthen the implementation of comprehensive prevention measures. Keep the ditch inside and outside the field free from moisture and moisture. The greenhouse was cleared for ventilation and the water vapor in the shed was excluded. Timely removal of diseased plants, removal of diseased leaves and diseased fruits, and deep burial outside the shed to reduce the accumulation of bacteria. Pay attention to cleaning the countryside, changing crops and turning the land, improving the environment for crop growth, and controlling the occurrence of diseases. Grasp the occurrence of sporadic disease or early onset drug use to control the spread of the disease. Control gray mold, sclerotinia disease, spray with 50% procymidone WP or 50% iprodione WP 800 to 1000 times. For the control of downy mildew, spray 58% methadium zinc WP wettable powder 500 times, or 25% methophyl wettable powder 500 times, or 72.2% propamocarb HCl salt 800 to 1000 times. The onset of the disease takes place once every 5 to 7 days for continuous treatment and 2 to 3 times.
Strengthen Prevention and Control of Vegetable Pests and Diseases in Early Spring
In the early spring, it is important to control the pests and diseases of vegetables, especially greenhouses, to control the base number of diseases and insect pests in the whole year, and it is also a key measure to achieve a good harvest of spring waxy vegetables.