Symptoms of Herbicide Damage in Schisandra chinensis and Remedial Measures

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

1. Herbicide drift

Herbicide drift damage refers to the damage caused when herbicides used in other nearby farmland drift with the wind onto Schisandra chinensis. It is mainly caused by two reasons. First, the wind is relatively strong during spraying, causing drift; second, herbicides have a relatively low boiling point, and at high temperatures, due to the transpiration of water and fertilizer, gaseous herbicides combine with moisture in the air, drift onto Schisandra chinensis and condense there, causing damage. Herbicide drift damage appears as whitening at the leaf edges with a water-soaked appearance, later presenting as brown necrotic spots, and finally the leaves scorch and die. It can also cause new leaves to curl and, in severe cases, wither and fall off. It also affects pollination quality, resulting in flowers that do not set fruit, and during the fruiting period, fruit drop occurs. In mild cases, yield is reduced; in severe cases, there is a total loss of harvest.

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 cannot be planted immediately and the pesticide was used two years earlier, the herbicide damage may be relatively severe. Soil residue damage mostly manifests as chronic damage, with inconspicuous symptoms. It will not cause plant death, but it will severely affect the yield and quality of Schisandra chinensis.

3. Remedial measures

After damage occurs, promptly remove the chlorotic and abnormal branches and leaves, as this can reduce the penetration and translocation of the agent into the plant. Then promptly carry out intertillage and loosening of the soil, increase the application of phosphorus and potassium fertilizers, promote root development, and enhance the plant's resistance. It is best to maintain foliar fertilizer spraying to alleviate the damage. After damage occurs, plant growth regulators can also be sprayed in a targeted manner for reverse regulation, and trace-element fertilizers such as zinc, iron and molybdenum can also be used to promote plant growth and reduce the 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 plowed to fully degrade the pesticide residues.

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