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ã€Prevention and control methods】 1 Select a plot with high topography, good drainage, and loose soil as the seedbed; conditional disinfection of soil, application of organic fertilizer, or treatment of soil with 5406 can prevent the disease. 2 In time of initial onset, timely inoculation of diseased seedlings was concentrated and burned, and seedlings were planted with grass ash and lime (grasswood ash : lime = 8 : 2) to prevent the spread of the disease; mid-morbidity was 800 times that of 75% enemy powder, or 75% chlorothalonil Wettable powder is 600 times effective. 3 Chemical control: This disease is a fungal disease and is controlled by fungicides. Such as pentachloronitrobenzene 200 to 400 times; or 50% carbendazim 800 to 1000 times, spray once a week for 2 to 3 weeks; or 1:1:200 Bordeaux mixture or 0.3 to 0.5 degrees Lime sulfur.
Prevention and cure of kiwifruit blight
The main disease for the seedling stage. The pathogen of blight is Rhizoctonia solani, which is a subphylum of the fungus, which spreads through soil diseases and invades wounds and lenticels. In normal temperature (about 20°C) high humidity, root waterlogging, or in July-September high temperature and drought over-watering, it is easy to infect the seedlings and damage the roots and necks of the seedlings, stems and leaves above them. In the early stage, it developed from the root and neck and was spotted as water spots, light brown, semi-circular or irregular, followed by enlargement of small spots. The cortex of the roots and necks rotted for 1 week, and the leaves of the shoots wilted; the cortex of the diseased seedlings rotted. Easy to fall off, leaving only the xylem. Leaf symptoms are similar to young stems.