What are the common pests and diseases of kiwifruit? A detailed explanation of the latest control methods
Kiwifruit, also known as the Chinese gooseberry, is a fruit with a fresh, tender, soft texture, a sweet-and-sour taste and a unique flavor. It is highly nutritious, rich in a variety of vitamins, amino acids and various trace elements. However, many fruit growers encounter many pests and diseases during cultivation, which leads to poor quality kiwifruit and often causes reduced yields. Below, Qinong Wang brings you the common pests and diseases of kiwifruit and their control methods.
1. Root rot
Root rot damages the root system of the plant, so it is generally not easy to detect, 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. Eventually 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. In places where root rot has generally occurred, it is not suitable to plant again within 2-3 years.
2. Brown spot disease
Brown spot disease first damages the leaves, and then as the disease spreads it damages the branches and fruit. When it occurs, water-soaked lesions appear at the edges of the leaves and then slowly spread, forming large irregular lesions. If it is not stopped, the entire plant will become infected, causing the plant to wilt 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 stages. 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 uses these as a point to gradually spread, forming lesions.
Control methods: In the early stage of the disease, Huika can be used for control. Remove the diseased flowers and fruit to avoid harming other flowers and fruit. When the disease is severe, Cuirun can be used for treatment.
4. Root-knot nematode
Root-knot nematodes, like root rot, damage the root system of the plant, and the disease is not easy to detect when it occurs. When it occurs, the roots of the plant swell and form root galls, which hinders root growth and causes poor growth and stunting of the plant.
Control methods: Root-knot nematodes like to live in acidic soil, so living stone flowers or plant ash can be used to adjust the acidity of the soil and reduce the occurrence of root-knot nematodes. In addition, chemical control can be used, and avermectin can be used for root drenching to kill root-knot nematodes.
The above are the common pests and diseases of kiwifruit and their control methods brought to you by Qinong Wang. We hope they can be helpful to you. For more agricultural knowledge, please stay tuned to Qinong Wang.