Symptoms and Prevention of Spinach Virus Disease
From the seedling stage to the adult stage, the disease can be infected. Field diseased plants often show different symptoms. The typical symptom is that the young leaves show thick green and light mottled, floral leaves, and the leaves are flat and not collapsed. In some diseased plants, the white leaves of the whole plant fade outward from the base, but the tip is still normal green. Some showed yellow veins, slightly transparent veins, still normal green veins, leaf shrinkage. Some diseased leaves have narrowed deformities, and fern leaf forms are severe. There are also diseased plants that collapse into a cluster of hearts and dwarf plants. It is transmitted by locusts and sap. Drought, poor ventilation, and heavy grass land masses. Control methods 1 Remove weeds in the field in time. 2 Strengthen field management, timely planting, timely watering to reduce ground temperature, change the microclimate in the field. 3 Apply enough organic fertilizer to achieve the combined application of nitrogen, phosphorus and potassium to improve the disease resistance of spinach. 4 timely control of locusts. Select 2% sprayed chrysanthemum 2000 to 3000 times, or 40% dimethoate 1000 times, 50% anti-influx 2000 to 300 times liquid for prevention. 5 At the beginning of the disease, spray 1.0% of the diseased disease emulsion 1000 times, or 300 times of the antitoxic agent No. 1 and 20% of the virus A wettable powder 500 times. Spray once every 10 days. Usually need to spray 2~3 times continuously. . However, due to the short growth time of spinach, it is rarely used after the onset of the disease. Biological Microscope Biological Microscope,Trinocular Thermostat Microscope,Biological Trinocular Microscope,Biological Artificial Microscope NINGBO VANCO INSTRUMENT CO.,LTD , https://www.vancoscope.com