A Detailed Explanation of Common Diseases and Pests of Kiwifruit and Their Control Methods
Kiwifruit, also known as yangtao, is a fruit with a fresh, tender and soft texture, a sweet-and-sour taste and a unique flavor. It has high nutritional value and is rich in various vitamins, amino acids and multiple trace elements. However, many fruit growers encounter many diseases and pests during cultivation, which leads to poor kiwifruit quality and often causes reduced yields. Below, Qinong Net brings you the common diseases and pests of kiwifruit and their control methods.
1. Root rot
Root rot damages the roots of the plant, so it is generally not easy to notice, but it can be detected through some external symptoms of the plant. In the early stage of the disease, the plant grows poorly and the leaves turn yellow or fall off. As the disease develops, yellow-brown lesions appear on the bark of the trunk, the bark softens and falls off, and the internal tissue rots. When the root area is dug open, the entire root system is found to have rotted and to be covered with white mycelium and black rhizomorphs. In the worst case, the entire plant withers and dies.
Control methods: The disease generally begins in April, when there is more rain, the soil tends to become waterlogged, and pathogens are likely to invade. Cyhalothrin aqueous solution can be used for root drenching and spraying for control. Generally, places where root rot has occurred are not suitable for planting again within 2-3 years.
2. Brown spot disease
Brown spot disease first damages the leaves, and then, as the disease spreads, it harms the branches and fruits. When the disease occurs, water-soaked lesions appear at the edges of the leaves and then slowly spread, forming large irregular lesions. If not stopped, the entire plant will be infected, causing the plant to decline and the leaves to wither and fall off.
Control methods: In the early stage of the disease, promptly prune off diseased leaves or diseased branches, then burn them, and then use Biai pesticide for control. If the disease is relatively severe, Xiuku can be used for treatment.
3. Gray mold
Gray mold mainly occurs during the flowering and fruiting periods. After infection, the flowers change color and rot and fall off. After the fruit is infected, the fine hairs on the fruit surface turn brown, and in severe cases it can lead to fruit drop. When the disease occurs, the pathogen attaches to the stamens and petals and, using these as a starting point, gradually spreads and forms lesions.
Control methods: In the early stage of the disease, Huika can be used for control. Remove the diseased flowers and fruits to prevent harm to other flowers and fruits. When the disease is severe, Cuirun can be used for treatment.
4. Root-knot nematode
Root-knot nematodes, like root rot, damage the roots of the plant, and the disease is not easy to notice when it occurs. When the disease occurs, the roots of the plant swell and form root galls, which hinder root growth and cause poor growth and stunting of the plant.
Control methods: Root-knot nematodes prefer to live in acidic soil, so lithops or plant ash can be used to adjust soil acidity and reduce the occurrence of root-knot nematodes. In addition, pesticides can be used for control, and avermectin can be used for root drenching to kill root-knot nematodes.
The above are the common diseases and pests of kiwifruit and their control methods brought to you by Qinong Net. We hope they are helpful to you. For more agricultural knowledge, please stay tuned to Qinong Net.