Symptoms of Herbicide Damage in Schisandra chinensis and Remedial Measures

Schisandra chinensis is a Chinese medicinal herb with extremely high economic value, so it is sought after by many people and has attracted numerous farmers to grow it. However, during cultivation, a large number of seedlings die because of herbicide damage, so this must be taken seriously. So how should Schisandra chinensis herbicide damage be remedied? Let's take a look at the detailed introduction together.

1. Herbicide drift

Herbicide drift damage refers to the damage caused to Schisandra chinensis when herbicides used in other nearby farmland drift with the wind onto the plants. It is mainly caused by two reasons. First, when spraying, the wind is relatively strong, causing drift to occur; second, the boiling point of the herbicide is relatively low, and at high temperatures, through the transpiration of fertilizer and water, the gaseous herbicide combines with moisture in the air, drifts onto Schisandra chinensis, and condenses, producing herbicide damage. Herbicide drift damage appears as whitening at the leaf margins with a water-soaked appearance, later showing brown necrotic spots, and finally the leaves scorch and die. It can also cause new leaves to curl, and in severe cases they wither and fall off. It also affects pollination quality, showing the phenomenon of flowers without fruit, and during the fruiting period there will be fruit drop. In mild cases, yield is reduced; in severe cases, there is total crop failure.

2. Soil residues

In plots where long-residual herbicides such as triazines, sulfonylureas, and imidazolinones have been used, Schisandra chinensis should not be planted within two years. If it is not possible to immediately plant and the situation of pesticide use two years earlier is not known, herbicide damage may be relatively severe. Soil residue damage mostly appears as chronic herbicide damage, with inconspicuous symptoms, and it will not cause plant death, but it will seriously affect the yield and quality of Schisandra chinensis.

3. Remedial measures

After herbicide damage occurs, promptly remove the chlorotic and deformed branches and leaves. This can reduce the penetration and translocation of the herbicide into the plant. Then promptly cultivate and loosen the soil, apply more phosphorus and potassium fertilizer, promote root development, and enhance the plant's resistance. It is best to maintain foliar fertilization to alleviate the herbicide damage. After herbicide damage, targeted spraying of plant growth regulators can also be used for reverse regulation, and trace fertilizers such as zinc, iron, and molybdenum can also be used to promote plant growth and reduce herbicide damage. For soil residues, Wotuan can be used during the fallow period of the farmland, diluted 2000 times with water, stirred evenly, and sprayed on the ground, then through plowing, the pesticide residues can be fully degraded.

The above is an introduction to the symptoms of herbicide damage in Schisandra chinensis and remedial measures. We hope it can help you. If you want to learn more related knowledge, please follow us.