Symptoms and Control Methods of Grape Virus Disease
The following is a detailed introduction of the symptoms and control methods of grape virus disease in the field of green plants and flowers for netizens. Here is the detailed introduction.
Symptoms and Control Methods of Grape Virus Disease
The symptoms of grape virus disease include shriveled and deformed new leaves, with deep green notches, sometimes reaching the main veins. Leaf veins are asymmetrical, and leaf edges are irregularly serrated. Before or at the early stage of the virus disease symptoms, it is necessary to use various medications promptly, such as ningnanmycin, moroxydine acetate, and mushroom polysaccharides, combined with spraying of Haotingling foliar fertilizer.
Symptoms of Grape Virus Disease
The symptoms of grape virus disease include shriveled and deformed new leaves on the new shoots in spring, with deep green notches, sometimes reaching the main veins. Leaf veins are asymmetrical, and leaf edges are irregularly serrated. The petioles have a wide opening angle, presenting a fan-shaped appearance.
Sometimes there are light green spots, twisted leaf veins, and prominent veins. Infected plants have severe blossom and fruit drop, smaller fruit clusters and berries, reducing yield. The whole plant becomes vigorless and develops poorly.
Grape Virus Disease HazardGrape virus disease is a very serious disease, known as the "cancer" of grapes. Most virus diseases have latent characteristics and do not show obvious symptoms in the early stage. Symptoms in the later stage can easily be confused with symptoms of chemical damage or physiological diseases, often causing significant losses for fruit farmers.
Causes of Grape Virus Disease
The pathogen of grape virus disease is a spherical virus, with a diameter of 25-30 nanometers, and its virus particles are isometrically symmetrical and icosahedral. The vector for transmission is the nematode in the soil, and grafting and sap can also transmit the virus. Nematode larvae can transmit the virus throughout their larval stage, and adult nematodes can transmit the virus for several months. Nematodes can transmit the virus within minutes of feeding. Larvae do not carry the virus after molting.
What Medications Work Well for Grape Virus Disease
Grape virus disease can be treated. Before or at the early stage of virus disease symptoms, it is necessary to use various medications promptly to inactivate the virus. Medications can include ningnanmycin, moroxydine acetate, and mushroom polysaccharides, combined with spraying Haotingling foliar fertilizer.
Treatment for Grape Virus DiseaseGrape virus disease is transmitted by aphids, thrips, and whiteflies. Use mushroom protein polysaccharides combined with natural brassinolide, cinnamycin acetate, zinc sulfate, and thiamethoxam for prevention and control. Spray the foliage once every 7-10 days, for a total of 2-3 times, to inactivate the virus, reduce virus activity, inhibit virus replication, and kill the virus and vectors such as aphids, thrips, and planthoppers, which can prevent the onset of the disease and prevent its spread.
Control Methods for Grape Virus Disease
1. Soil disinfection: Use disinfectants such as methyl bromide or carbon disulfide to treat the soil to eliminate nematodes.
2. Heat treatment to remove the virus: Place the grape variety seedlings intended for propagation under 35°C for 20 days to remove the virus causing fan leaf disease.
The above is a complete introduction to the symptoms and control methods of grape virus disease, for everyone to study and understand!