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. The third is to remove the remains in time, remove the diseased plants in time, burn them or bury them deeply, and spray 70% methyl thiophanate wettable powder 600 times 800 times, or Antaisheng 600 times.
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Key points of cultivating Pleurotus ostreatus in high temperature season
Over the years, many mushroom farmers have tried their best to avoid cultivating Pleurotus ostreatus in hot seasons because of high pollution rates, serious diseases and insect pests, and great changes in the market. In view of the above problems. This paper introduces a set of key points of cultivating Pleurotus ostreatus in high temperature season. Varieties with medium and high temperature, strong stress resistance, white and dense hyphae, strong wall climbing and less aerial hyphae should be selected, and medium-and low-temperature and low-temperature varieties should be resolutely eliminated. Cultivation sites should be selected by the courtyard, under the shade of trees, and in the wild woods, but good ventilation should be paid attention to.
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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, spray 1vl 200Bordeaux or 1000 times carbendazim, once every 7 days, even.
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