Harm of herbicides to Schisandra chinensis
1. Residual drug damage in soil
1. Symptoms. In the middle stage of growth, the leaves wilted, the leaves recovered straight in the morning and evening, the plants were not long, similar to drought, and the root system developed slowly.
2. The reason. Drug damage of triazobenzenes, sulfonylureas, Imidazolinones, etc.
3. Preventive measures.
In ⑴, Schisandra chinensis can not be planted in the cultivated land where long residual herbicides such as triazobenzene, sulfonylurea and Imidazolinone have been used.
⑵ found that the symptoms could be irrigated with 500x solution of Kangpu Capuke, sprayed with wall protection on leaves, Ye Cui and so on.
II. Herbicide drift damage
1. Symptoms. The new functional leaves were curled in spring, and when they were serious, the leaves were black, withered and fell off, the herbicide drift occurred in the flowering stage, petals wilted, petals fell off early, pollen vitality decreased or died, pollination was difficult, and flowering and unfruiting appeared.
2. The reason. (2) the drug damage of butyl esters.
3. Preventive measures.
⑴ suggested that 2pyrum 4murine D isooctyl ester should be used instead of 2pyrine 4murd butyl ester.
⑵ found that the symptoms could be sprayed with 500x yellow humic acid foliar fertilizer.
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Control of root rot of Schisandra chinensis
Root rot of Schisandra chinensis, commonly known as rotten ankle disease and choking disease, is one of the main diseases in Schisandra cultivation. At present, the incidence area is more common and the harm is more serious. The disease usually occurs from May to early August. At the beginning of the disease, the epidermis at the junction of the root and the ground (root neck) blackened, further cortical decay, shedding, forming a ring, the leaves wilted, and the whole plant died a few days later. The cause of the disease was related to physiological diseases. The ground changes violently during the day and night in early spring and late autumn, the temperature difference is large, the tissue at the root and neck is tender, the disease resistance is decreased, and the cortex feels frozen.
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Garden selection of Schisandra chinensis
Schisandra chinensis likes neutral or slightly acidic, thick soil layer, more humus, loose and fertile, perennial moist, low groundwater level, flat or shady sloping loam, sandy loam. Ventilation and light transmission, irrigation and drainage conditions are required. Schisandra chinensis is not resistant to drought, moisture and waterlogging, and its growth potential is weak in low-lying land or over-moist soil for a long time, so artificial cultivation of Schisandra chinensis should choose plots with good drainage and not easy to accumulate water. It is advisable that the slope should not exceed 10 degrees.
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