Ginger disease is the main disease that damages ginger. Its initial period is generally early June, and it is the most serious in July and August. The output of heavy fields can be halved or even eliminated, which seriously affects the quality and yield of ginger. Therefore, Jiangnong should pay attention to the prevention and control of Jiangyan disease. The strategy for prevention and control is to adopt the principle of "prevention as the mainstay and comprehensive prevention and control" and adopt a combination of agricultural control and chemical prevention. Specific should grasp the following work: First, choose Jiang place. We must choose sandy loam or loam that is rich in organic matter, aerated, soft and well-arranged, and cultivated on land that has not been planted with ginger in the past 3-4 years (ie, do a good job in rotation). Second, select the best varieties. To select bright yellow, shiny, buds and more, the first whole no scars, plump and full of ginger for ginger, found that bud base black or yellow brown section should be eliminated. Third, do a good job cleaning. In order to prevent germ-borne bacteria, soaking and disinfection can be performed before germination. The medicine is immersed in 1:1:120 Bordeaux mixture or 20% ash for 20 minutes. Fourth, do a good ridge. Although ginger is a plant that moistens green soil, it is also afraid of waterlogging. Therefore, it is better to do hoe planting, especially after replanting autumn plough, in order to prevent waterlogging. Fifth, timely prevention and treatment. Most of the onset of ginger seedlings are sporadic. At this time, the diseased plants must be removed in a timely manner. After the diseased plants are removed, lime should be applied to disperse around the diseased points, and the pesticides should be used for prevention and treatment. The medicament can be used for 15% of the Ye Qingshuang WP. Or 50% dosing amine water spray 1000 times to prevent the occurrence of ginger aphid should be sprayed carefully around the disease, spraying every 7-10 days 2-3 times. Sixth, prevent infection. The diseased strains should be deeply buried or burned, and should not be lost anywhere. In addition, ginger acariditis can be transmitted through water. Therefore, the water in diseased plots should be strictly prevented from flowing into disease-free plots to prevent infection.
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