Symptoms and Control Measures of Celery Virus Disease in Sunlight Greenhouse

First, the symptoms of celery virus disease, also known as mosaic disease, the disease can damage a variety of vegetables. Seedlings appear as mosaics, and the growth and stagnation of cabbages are distorted. The severely diseased plants are obviously dwarfed and even die. Adult plants became infected early, fresh and tender leaves appeared mottled and later developed into mosaic leaves. The diseased leaves became smaller, often shrinking, twisting and deformed; some mesophylls were degraded, and the leaves narrowed and narrowed, showing chicken feet or twigs, petiole. Slim, dwarf plants. In the late stage of adult plants, the young leaves showed thick, pale green and white mosaics, and the plant growth was normal.

Second, prevention and control measures

1. Select disease-resistant varieties and implement rotations to select disease-resistant and disease-resistant varieties that are suitable for local planting, or implement rotations with other vegetables for more than 2-3 years.

2, strengthen the cultivation and management of disease-free soil nursery, cultivation of disease-free seedlings. Elimination of diseased seedlings when planting. Apply sufficient organic fertilizer, increase phosphorus and potassium fertilizers, spray foliar fertilizer, improve the resistance of celery. Timely soil and weeding. Proper close planting to prevent field closure. Appropriate foliar spray fertilizer to enhance plant disease resistance.

3, prevention and control of aphids in the seedling stage and the entire growth period attention to the prevention and control of aphids in order to prevent winged ticks spread of the virus, nursery shed ventilation openings covering insect nets. Anti-caries agents can be used 50% anti-inferiority WP 2000 times or 10% imidacloprid WP 2000 times or 50% chrysanthemum 2000 times.

4. The medicine is sprayed at the beginning of the disease to prevent the disease. The 0.5% mushroom proteoglycan hydrolyzate can be used as 300 times; 85% of the riboflavin copper-zinc water emulsion can be used as 600 times; 31% of morpholinium triazole can be used. Nucleoside soluble powder 700 times or 20% morpholinium copper WP 500 times, 2% amino oligosaccharide 300 times; 1.5% phytoalexin 800-1000 times, depending on the condition 7-10 days Spray once, control 3-4 times, have a certain effect.

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