Drug damage symptoms and remedial measures of Schisandra chinensis

Schisandra chinensis is a kind of traditional Chinese medicine with high economic value, so it is sought after by many people and absorbed by many farmers, but most of the seedlings die because of drug damage, so we must pay attention to it. So how to remedy the drug damage of Schisandra chinensis? Let's take a look at the detailed introduction.

1. Herbicide drift

Herbicide drift drug damage refers to the drug damage caused by herbicide drifting to Schisandra chinensis with the wind in other surrounding farmland, which is mainly caused by two reasons. First, the wind of the spray is strong, which makes it drift; second, the boiling point of herbicides is relatively low, fertilizer and water transpiration at high temperature, gaseous herbicides combine with water in the air, drift to Schisandra chinensis to condense, resulting in drug damage. The damage caused by herbicide drift is characterized by white leaf margin, water immersion, brown withered spot, scorched and dead leaves, curling new leaves, withering and shedding seriously, affecting the pollination quality and showing the phenomenon of flower but unfruit. fruit drop will appear in the fruit period, light will reduce yield, heavy will lose harvest.

2. Soil residue

It is not suitable to plant Schisandra chinensis in the land where triazobenzene, sulfonylurea, Imidazolinone and other long residual herbicides have been used in the past two years. If the herbicide is not used immediately two years ago, the herbicide damage may be more serious. Most of the residual drug damage in soil is chronic drug damage, the symptom is not obvious, will not cause plant death, but will seriously affect the yield and quality of Schisandra chinensis.

3. Remedial measures

After the occurrence of drug damage, the chlorotic and abnormal branches and leaves should be removed in time, which can reduce the penetration and transmission of chemicals into the plant, loosen the soil in time, increase the application of phosphorus and potassium fertilizer, promote the development of roots, enhance the resistance of plants, and it is best to keep foliar spraying fertilizer to alleviate drug damage. It can also be reverse regulated by spraying plant growth regulators after drug damage, and micro-fertilizers such as zinc, iron and molybdenum can also be used to promote plant growth and reduce drug damage. Soil residues can be treated with Wotuan in the fallow period of farmland, mixed with water 2000 times, stirred evenly and sprayed on the ground, so that pesticide residues can be fully degraded by ploughing.

The above is the introduction of Schisandra chinensis drug damage symptoms and remedial measures, hope to help you, want to know more related knowledge, please follow us.