Control of Rhizoctonia solani at Seedling Stage of Dangshen
The site of the disease is mostly at the base of the stem at the dry-wet junction below the epidermis. The initial yellow-brown disease spot sunken spot, the disease spot expanded around the stem and gradually soaked into the stem to rot and die. Once the infection occurs quickly, it will die in pieces.
Prevention and control methods:
Choose sandy soil with convenient drainage, good ventilation and increase the application of phosphorus and potassium fertilizer.
Choose 50% carbendazim wettable powder or 65% Dysen zinc wettable powder to mix seeds according to 0.2% Mel 0.3% of the seed amount; you can also use 50% carbendazim wettable powder and 65% Dysen zinc wettable powder to mix soil with 8 grams per square meter and use a rake deep on the border.
Spray treatment at the time of onset:
① 3.2% xanthate water agent after emergence, 10 grams per square meter to 3 kilograms of water.
② 3% Guangkuling water agent 700Mel 800 times liquid stem base watering or spraying effect is very good.
③ 70% dimethazone wettable powder 1000mur1500 times liquid or 50% carbendazim wettable powder 800x liquid 4ml 8kg per square meter is also very effective.
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What are the growth habits of Codonopsis pilosula?
Codonopsis pilosula is a perennial herbaceous vine. Like the environment with mild climate, cool summer and humid air. It is hardy, and the roots can survive the winter in the open field after cultivation. Strict requirements for light, seedlings like shade, like moisture, so the seedling period avoid the sun; after the seedlings like the sun. Codonopsis pilosula requires that the soil layer is deep and loose, with fertile sandy loam as the best. Avoid saline-alkali, clay and low-lying land, not suitable for continuous cropping.
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Winter pruning of Chinese wolfberry
After a year of growth, the Chinese wolfberry tree has many branches and a messy crown, and at the same time when new fruit branches are formed, some fruit branches have begun to grow old. Therefore, Chinese wolfberry needs to be pruned in winter, otherwise it will affect the yield and quality of the following year. By pruning, removing the old and replacing the new, selecting the old eye branches and seven inch branches with strong fruiting power, and cutting off the non-productive branches, it can lay a good foundation for the old eye branches to bear fruit and grow new fruit branches in the next year. In order to manage conveniently, it is necessary to control the height of the tree by cutting the top.
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