Core Tip: Summer is coming and the rain continues. Some time ago, hail was dropped in Shaanxi, Shanxi, and other places. The growers in the affected areas suffered enormous economic losses. According to the latest news from the China Meteorological Administration, in late June, high temperatures, heavy rain, and hail weather still exist. In order to minimize the impact of inclement weather on fruit trees and vegetables, it was necessary to prevent problems. Recently, reporters interviewed Zhang Zhicheng, a fruit specialist from Northwest Agriculture and Forestry University, and Ma Zhifeng, professor of Yangling Vocational and Technical College.
Clean up the orchard to reduce the source of the disease
The first is to clean up the hail, debris and fallen fruit in the orchard. For orchards with muddy or stagnant water after the flood disaster, the water should be drained in a timely manner to remove silt and exposing the dried fruit branches. Secondly, the hard-hit orchards with broken branches and broken leaves should be used to completely remove fallen leaves and fruit on the ground and dig deep. Buried, remove the no-commercial value of the wounded fruit, keep some of the small pit fruit, reduce the loss of the year.
Top dressing supplement to restore vitality
The first is foliar spray fertilizer, to solve the problem of tree nutrient deficiency; followed by the underground chase application of balanced NPK fertilizer, each strain 0.5 to 1 kg. After the fruit trees are restored to life, fertilization is mainly based on farmyard manure, and suitable amount of fertilizer is applied. In drought, fertilize with fertilizer.
Strengthen prevention and control of restoring tree potential
After fruit trees suffer from weaker tree vigor and reduced disease resistance, special attention should be paid to spray protection. First of all, we must promptly spray 2-3 times with thiobacillin and other fungicides on orchards. Secondly, we must spray 5 to 7 Baumedu limestone suicide after defoliation and before the budding of the following year. Pest prevention and prediction work ensures that the trees recover as quickly as possible.
First, we must cover the light and cool it down. Under strong light, choose suitable shading methods. At the same time, it is possible to maintain a reasonable number of leaves by proper pruning and avoid direct sun exposure to the fruit leading to sunburn. To avoid high temperature barriers in vegetables in the shed, attention should be paid to opening the upper and lower vents of the greenhouse to allow convection between the cold air outside the shed and the hot air in the shed to speed up the discharge of hot air, prevent the stigma of vegetables from drying out, promote pollination, and prevent falling flowers. Falling fruit.
Second, strengthen management after the rain to reduce losses. For vegetable greenhouses that have been immersed in water, the water in the fields should be eliminated as soon as possible to reduce the time for the vegetables to be flooded, and timely repair of the damaged vegetable greenhouses. Timely harvest and listing to ease the burden on plants. After the rain is fine, it enters the hot weather. At this time, the shaded nets should be shaded properly for the affected vegetables, which will help the plants recover.
Third, strengthen pest control. High humidity can easily lead to downy mildew, disease, powdery mildew, anthrax and other diseases. Such as downy mildew, can be used 72.5% procymidone Wei agent 800 times, 25% Ruiduomycete wettable powder 600 times and other spray; blight, commonly used 75% chlorothalonil WP 600 times, 50% cream urea Cyanide wettable powder spray 1500 times; anthrax, can be used 50% Prochloraz WP 1500 times, 25% azoxystrobin suspension 2000 times spray. After being hit by heavy rain, the resistance of vegetables is greatly weakened. It is best to spray broad-spectrum fungicide such as Anke, anti-virus, and Kelu to prevent the occurrence and spread of diseases.
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