Green pepper virus disease is one of the major diseases in the production of green peppers in greenhouses, and has a great impact on the yield. Early light production reduces production by 50% to 60%, and severe cases can cause no harvest.

First, there are four types of harm symptoms, their performance symptoms vary.

1, necrotic buds early onset, tender lobular fall off, and sometimes a large number of fallen leaves, falling flowers, fruit drop caused by plant stems, sometimes leaves falling with the hands and leaves fall, the top buds and shoots die, stems with necrotic brown streak The plants are short.

2. In the initial stage of mosaic type light mosaic, green and yellow mottled leaves appeared on the young leaves, and the plants had no symptoms of dwarfness, deformity and defoliation. In addition to these symptoms, the leaves also show irregularities, the convex part is foamy, the leaves are deformed, and sometimes the leaves become lines, the edges curl up, the plants grow slowly and dwarf, and the fruit is small.

3, arbor-type plants dwarf, internodes shorter, narrow and long leaves, branchlets clustered, but not fallen leaves, flowering is down, rarely result.

4, yellowing leaves gradually turn yellow from top to bottom, fallen leaves, fruit drop.

Second, the incidence of the law of the green pepper virus has two kinds of pathogens, the two viruses caused by different symptoms: cause mosaic, yellow is mainly cucumber mosaic virus, is transmitted by aphids; caused by streak necrosis type mainly tobacco Mosaic virus, a virus that spreads through the seeds of diseased bodies. Both viruses can be transmitted through contact in the field and can be co-infected.

However, defoliation can be caused by high temperature and drought, heavy ploughing, lack of water, lack of fertilizer, poor growth of locusts, heavy morbidity, sudden watering of soil drought, and plant infection with other diseases, etc., and attention should be paid to the difference of defoliation caused by virus diseases.

Third, the control methods used anti-virus varieties and non-toxic seeds. Implement a rotation of more than 3 years. Cultivate non-toxic strong seedlings and pay attention to flood prevention at the seedling stage. After planting, cover the mulch, strengthen management to promote hair roots, and increase resistance to disease. At the beginning of the disease, 20% of virus A wettable powder can be sprayed, or of viral WP can be used 500 times, or 5% of bacteriostatic water solution can be used to spray 300 times every 10 days.

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