What are the common pest and disease control methods for Pinellia ternata?
Pinellia ternata (crow-dipper) is widely distributed in China. It is a medicinal plant, mainly with the effects of drying dampness and resolving phlegm, descending adverse qi and stopping vomiting, and reducing boils and swelling, and growing it brings considerable economic returns. However, as the planting area increases, the harm from pests and diseases becomes more and more serious, severely affecting the yield and quality of Pinellia ternata. Below, the editor will explain the common pest and disease control methods for Pinellia ternata.
1. Pinellia ternata soft rot
Also called Pinellia ternata corm rot, it is a bacterial disease. The pathogen is mainly spread through water, and it mainly occurs in hot and rainy seasons. When the disease occurs, the pathogen invades through wounds, and the tubers begin to rot. As the disease develops, the pathogen gradually spreads to the aboveground parts, causing water-soaked soft rot lesions on stems and leaves, accompanied by a foul odor, and finally the plant withers and dies.
Control methods: Select disease-free, high-quality, healthy seeds, choose plots with higher terrain and good drainage for planting, carry out reasonable crop rotation, and reduce sources of bacteria and pests.
2. Pinellia ternata viral disease
Viral disease, as the name suggests, is mainly caused by virus-carrying tubers at planting time, and it can also be transmitted by aphids. When the disease occurs, it shows mosaic symptoms, the leaves shrink and become deformed, and chlorosis and yellowing also appear. If virus-carrying seeds and tubers are used, they are not easy to germinate, 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 disease resistance of the plants, eliminate pests such as aphids, and cut off transmission routes. When diseased plants are found, pull them out, take them out of the field and burn them, disinfect the diseased holes with lime powder, and then spray 40% dimethoate 2000 times liquid or 80% dichlorvos 1500 times liquid. Once a week, for 2-3 times in a row.
3. Red hawk moth
It mainly harms plants as larvae. After hatching, the larvae parasitize the underside of leaves, gnawing the leaf epidermis clean, forming transparent spots, then small holes, and finally notches appear on the leaves. In severe cases, they can gnaw 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 pest sources. During the larval stage, combine intertillage and weeding to eliminate eggs, and black light traps or pesticides can also be used for control.
4. Thrips
Both adult and larval thrips can cause damage. They gather on the young and tender parts of leaves, suck sap, destroy leaf tissue, and hinder the growth of Pinellia ternata. During their outbreak period, the plants become dwarfed, the leaves curl, and finally dry up, shrink and die, seriously affecting the yield and quality of Pinellia ternata, with 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 pest sources. Carry out reasonable crop rotation to reduce the degree of pest damage, remove weeds thoroughly in time during the growing period, and also use their natural enemies for agricultural control or chemical control with pesticides.
The above are the common pest and disease control methods for Pinellia ternata. We hope they can help you. If you want to learn more about Pinellia ternata cultivation knowledge, please keep following us.