The Latest Control Methods for Common Pests and Diseases of Pinellia
Pinellia ternata is widely distributed in China. It is a medicinal plant, mainly with the effects of drying dampness and resolving phlegm, directing rebellious qi downward and stopping vomiting, and reducing boils and swelling, and the economic returns from growing it are considerable. However, as the planting area increases, the harm from pests and diseases has also become more serious, severely affecting the yield and quality of Pinellia ternata. Below, the editor will explain the control methods for common pests and diseases of Pinellia ternata.
1. Pinellia soft rot
Also called Pinellia corm rot, it is a bacterial disease. The pathogen is mainly spread through water and occurs mainly in hot, rainy seasons. When the disease develops, the pathogen invades through wounds, and the tubers begin to rot. As the disease progresses, the pathogen gradually spreads to the aboveground parts, causing water-soaked soft rot lesions on the stems and leaves, accompanied by a foul odor, and finally the plant withers and dies.
Control methods: Select healthy seeds that are disease-free and of good quality, choose plots with higher terrain and good drainage for planting, and rotate crops reasonably to reduce sources of the pathogen and pests.
2. Pinellia viral disease
Viral disease, as the name implies, is mainly caused by virus-carrying tubers used at planting time, and it can also be transmitted by aphids. When the disease occurs, it shows mosaic symptoms, the leaves wrinkle and become deformed, and chlorotic yellowing also appears. If virus-carrying seeds and tubers are used, they do not sprout easily, and using virus-carrying tubers for planting when mature will cause variety degeneration and affect yield.
Control methods: Cultivate virus-free seedlings, detoxify tubers by heating at planting time, strengthen field management, apply more organic fertilizer and phosphorus and potassium fertilizer, improve the plant's disease resistance, eliminate aphids and other pests, and cut off the transmission route. Remove diseased plants when found, take them out of the field and burn them, disinfect the diseased holes with lime powder, then spray 40% dimethoate 2000-fold solution or 80% dichlorvos 1500-fold solution. Once a week, for 2-3 consecutive times.
3. Red hawk moth
The larvae are mainly the damaging stage. After hatching, the larvae live on the undersides of leaves and eat the leaf epidermis clean, forming transparent patches, then small holes, and finally notches appear on the leaves. In severe cases, they can eat all the leaves clean.
Control methods: Adults pupate in the soil to overwinter, and after overwintering they begin to lay eggs and hatch, so before planting, plow the soil deeply to eliminate overwintering pupae and reduce the pest source. During the larval stage, combine cultivation and weeding to eliminate eggs, and black light traps can also be used to trap and kill them, or pesticides can be used for control.
4. Thrips
Both adult thrips and larvae can cause damage. They gather on the young parts of leaves, suck the sap, and destroy leaf tissue, hindering the growth of Pinellia ternata. During their outbreak period, the plants become stunted, the leaves curl, and finally dry up and wither, seriously affecting the yield and quality of Pinellia ternata and causing relatively heavy economic losses.
Control methods: After harvest, clean the field in time, collect dead branches and fallen leaves and burn or bury them deeply, and plow the soil in autumn to reduce the pest source. Rotate crops reasonably to reduce the degree of pest damage, remove weeds thoroughly during the growing period, and agricultural control using their natural enemies or chemical pesticide control can also be used.
The above are control methods for common pests and diseases of Pinellia ternata. We hope they can help you. To learn more about Pinellia ternata cultivation, please stay tuned to us.