How to prevent and cure panax notoginseng epidemic disease
The disease, also known as "rotten leaves", began to occur from April to May, and was serious from July to August. After the injury, the leaves or petioles showed dark green irregular disease spots, then the disease spots deepened, the affected parts became soft, and the leaves were like boiling water, showing a translucent shape. and then dry or droop and stick to the base of the stem.
Prevention and control methods: first, cut off the ground part after fruit picking, clean the countryside, spray the border surface with 1-2 Baumedu stone sulfur mixture and disinfect it. Second, before the onset of the disease, sprayed with 1000 times of carbendazim or 200 Bordeaux solution or 50% carbendazim, once every 7 days, consecutive 2 times 3 times.
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How to prevent and cure round spot disease of Panax notoginseng
It can damage all parts of the plant, and the back of the leaf shows small yellow spots at the initial stage of the disease, and rapidly expands into a transparent circle in wet or continuous rainy days. When the weather is dry after the disease, the disease spot is large, round brown, with obvious wheel patterns. When the stem is damaged, the damaged part is chestnut color, and the diseased part has a gray-white mildew layer, which can cause bud rot and stem base rot. Prevention and control methods: first, in the epidemic season, open the ventilation door of Panax notoginseng garden to increase air flow and reduce humidity in the garden. The second is to adjust the light intensity of Panax notoginseng to avoid excessive light, which is conducive to the spread of the disease.
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How to control pests in seedling field of Panax notoginseng
When the damage of aphids and shell insects occurs, 50% phoxim EC 1000 times and 40% dimethoate emulsion 1000 times can be used to control. For plots with a large number of grubs and ground tigers, 90% crystal trichlorfon 50-75 grams per mu can be mixed with 20 kilograms of fine soil, or mixed with 50 kilograms of chopped fresh vegetable leaves and sprinkled in the evening. For the rodents in Panax notoginseng garden, according to their daily habits, we can plug the hole during the day and place traps and cages in the places where the harmful rats often go in the evening.
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