Ginger anthracnose can harm leaves, sheaths, and stems. Infected leaves mostly appear from the tip or leaf edge of a nearly circular or irregular wet-like chlorotic lesions, can be linked to each other into irregular large spots, severe leaves can be dry, black spots grow on the black Slightly coarser granules. Harmful stems or sheaths form indeterminate or short-spotted lesions, also with small black spots, and in severe cases can cause the leaves to droop but remain green. Seriously affects the yield and quality of ginger. So how to prevent ginger anthrax?
I. Agricultural control
1. Rotation: Do not make continuous or adjacent works with Solanaceae or other crops of the family Zingiberaceae. Rotation with rice for a year works well.
2. Reduce the source of bacteria: Thoroughly clean the pastoral area, do not apply soil miscellaneous fertilizers that are not completely decomposed and composted with diseased residues, and deep-turning soils can effectively reduce the initial infection source.
3. Sorghum deep-groove planting, applying high-quality organic base fertilizer, leveling the flour surface, timely cultivating the soil, removing weeds, reducing the humidity in the field, and appropriately adding phosphorus and potassium fertilizers.
Second, drug control
1. In early stage of disease, the diseased leaves are buried or burned in time. After the harvest, the diseased body was completely removed and burned.
2. Spray protection. Optional spray: 80% anthrax Fumei wettable powder 600-750 times, 70% thiophanate-methyl wettable powder 1000 times or 40% polysulfide suspension 500 times and so on. The spray is sprayed 3-4 times in every 8-10 days.
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