Chili virus disease is one of the most important diseases that have severely affected the high yield of pepper for several years in a row. It spreads quickly, and can simultaneously harm the leaves and fruits, and even cause the loss of production. The degree of damage is more serious. Recently, vegetable farmers have asked about this disease every spring. What happened? How to prevent it?
Virus disease is a systemic disease that can damage leaves, flowers, and fruit at the same time. The causes of viral diseases are more complex. There are several pathogens such as tobacco mosaic virus, alfalfa mosaic virus, and cucumber mosaic virus, which are caused by various pathogens. The symptoms are slightly different and the degree of harm varies.
1. Symptoms of viral disease: Viruses on peppers are mainly mosaic virus disease. It often occurs on the top leaves. The symptoms are leaf mosaic, yellowing, and leaf curling. The plants show shrinkage or small spots on the fruit, and cracks when severe. When several viruses co-infect, the symptoms of streaks are caused, and dark brown streaks appear on the leaves and fruits. In severe cases, the whole leaves are defoliated, and the light and effects of the peppers are severely impeded; Occasionally, individual plants appear to have leaves Symptoms, new leaves do not stretch, needle-like, slow-growing plants or "crazy head" or the top of the dark, necrotic top dry virus disease.
2. Onset conditions: Pepper virus disease generally occurs after spring temperatures rise or when summer temperatures are high. When the peppers encounter high temperatures and drought conditions that are not conducive to plant growth during growth, they are susceptible to viral diseases, especially in white powder. The chance of contracting a virus disease when pests such as cockroaches and aphids occur increases. The viral disease of pepper is usually the peak of onset from March to April, and sometimes it is caused by seed poisoning causing plant susceptibility. In the winter when the temperature is low and the peppers are weak, it is easy to show slight virus symptoms such as mosaics and slow growth. The spread of the disease is generally indirect through the use of pests that inhale food feeders or human wounds. The law of occurrence of viral diseases should be grasped so that comprehensive measures can be taken by taking "prevention as the main" to take various measures to achieve better results.
3, control methods: 1 do seed treatment. Disinfection and sterilization of seeds can be soaked in fresh water for 3 to 4 hours before sowing, and then soaked in 10% trisodium phosphate solution for 3 to 4 hours or soaked in 0.1% potassium permanganate solution for 30 minutes. 2 prevent disease first pest. After the temperature rises, whiteflies and roundworms often occur in the sheds. Attention should be paid to the timely prevention and control of pests. Pests can be controlled at the stage of spotting by using insecticide nets to prevent insects and insecticides. The number of screened insect net must be greater than 60 mesh, the choice of drug contact and internal suction type; pay attention to spray tight and thoughtful.
4, to improve the growth environment: By adjusting the temperature, light and reasonable water and fertilizer supply to ensure the robust growth of plants, enhance the plant's anti-virus ability.
5, chemical control: You can use the virus spirit or disease prevention 1000 times prevention. The virus A plus net (or other insecticides to kill maggots, whitefly) plus the Harvest No. 1 (or Yunda 120) even sprayed three times, interval 5 to 7 days again.
Virus disease is a systemic disease that can damage leaves, flowers, and fruit at the same time. The causes of viral diseases are more complex. There are several pathogens such as tobacco mosaic virus, alfalfa mosaic virus, and cucumber mosaic virus, which are caused by various pathogens. The symptoms are slightly different and the degree of harm varies.
1. Symptoms of viral disease: Viruses on peppers are mainly mosaic virus disease. It often occurs on the top leaves. The symptoms are leaf mosaic, yellowing, and leaf curling. The plants show shrinkage or small spots on the fruit, and cracks when severe. When several viruses co-infect, the symptoms of streaks are caused, and dark brown streaks appear on the leaves and fruits. In severe cases, the whole leaves are defoliated, and the light and effects of the peppers are severely impeded; Occasionally, individual plants appear to have leaves Symptoms, new leaves do not stretch, needle-like, slow-growing plants or "crazy head" or the top of the dark, necrotic top dry virus disease.
2. Onset conditions: Pepper virus disease generally occurs after spring temperatures rise or when summer temperatures are high. When the peppers encounter high temperatures and drought conditions that are not conducive to plant growth during growth, they are susceptible to viral diseases, especially in white powder. The chance of contracting a virus disease when pests such as cockroaches and aphids occur increases. The viral disease of pepper is usually the peak of onset from March to April, and sometimes it is caused by seed poisoning causing plant susceptibility. In the winter when the temperature is low and the peppers are weak, it is easy to show slight virus symptoms such as mosaics and slow growth. The spread of the disease is generally indirect through the use of pests that inhale food feeders or human wounds. The law of occurrence of viral diseases should be grasped so that comprehensive measures can be taken by taking "prevention as the main" to take various measures to achieve better results.
3, control methods: 1 do seed treatment. Disinfection and sterilization of seeds can be soaked in fresh water for 3 to 4 hours before sowing, and then soaked in 10% trisodium phosphate solution for 3 to 4 hours or soaked in 0.1% potassium permanganate solution for 30 minutes. 2 prevent disease first pest. After the temperature rises, whiteflies and roundworms often occur in the sheds. Attention should be paid to the timely prevention and control of pests. Pests can be controlled at the stage of spotting by using insecticide nets to prevent insects and insecticides. The number of screened insect net must be greater than 60 mesh, the choice of drug contact and internal suction type; pay attention to spray tight and thoughtful.
4, to improve the growth environment: By adjusting the temperature, light and reasonable water and fertilizer supply to ensure the robust growth of plants, enhance the plant's anti-virus ability.
5, chemical control: You can use the virus spirit or disease prevention 1000 times prevention. The virus A plus net (or other insecticides to kill maggots, whitefly) plus the Harvest No. 1 (or Yunda 120) even sprayed three times, interval 5 to 7 days again.
Agrostis Stolonifera,Astragalus Sinicus,Vicia Villosa,Agropyron Cristatum
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