How to prevent and control common pests and diseases of carambola? A full analysis of practical methods
Carambola is a common fruit for us, rich in nutrients, with stable market prices and a wide planting area. However, during the growth of carambola trees, they are often invaded by certain pests and diseases. In mild cases, this causes poor plant growth and reduced yield; in severe cases, it causes plant death and total crop failure, which is a huge economic loss for growers. So what pests and diseases will carambola suffer from during growth? And how should they be prevented and controlled? Come to Qinnong Net and take a look at the common pest and disease prevention and control methods for carambola.
1. Anthracnose
Anthracnose is one of the common and more harmful diseases of carambola. It only harms the fruit of carambola. This disease generally occurs during the fruit ripening stage. In addition, during transportation, the fruit can also become infected because of wounds on its surface. Its pathogen overwinters in branches and fruit, and when the temperature rises the following year, it begins to multiply and spread rapidly with the help of wind, rain and insects, with more severe incidence especially during periods of high temperature and frequent rain. When the disease occurs, brown spots appear on the fruit surface. As the disease develops, the spots gradually expand, and multiple spots can form large dark brown patches, while the flesh inside the spots has already rotted and gives off an alcoholic smell.
Prevention and control methods: Before overwintering, in combination with pruning, diseased branches, dead branches, mummified fruit and fallen fruit on the ground should be gathered and burned or buried deeply to prevent the pathogen from overwintering on the plants. During hot and rainy seasons, orchard management should be strengthened, with attention to drainage, improved ventilation, and reduced air humidity. Increasing the application of phosphorus and potassium fertilizers can improve the disease resistance of the plants. After a large-scale outbreak, Bordeaux mixture or copper oxychloride can be sprayed in the orchard for prevention and control.
2. Red spot disease
Red spot disease is a fungal infection disease. It mainly harms the leaves of the plants. When the disease occurs, small yellow spots appear on the leaves. As the disease develops, the spots gradually spread and merge, forming round or irregular spots. The spots are initially red, then gradually become grayish white or grayish brown, and finally the leaves wither and fall off.
Prevention and control methods: Strengthen management, increase the application of phosphorus and potassium fertilizers, and enhance tree vigor and disease resistance. In spring and winter, collect and burn dead leaves and dead branches on the ground and in the planting area to prevent the fungus from overwintering. When new leaves grow in spring, spray Bordeaux mixture or copper oxychloride for prevention.
3. Bird feather moth
The bird feather moth is a type of moth. It mainly lays eggs on the leaves and branches of plants. After the eggs hatch into larvae, they harm flowers and young fruit. Because the larvae are red, they are also called red silk worms. Its larvae are extremely small and difficult to see with the naked eye. They gnaw flowers during the flowering period and gnaw fruit during the fruiting period. In severe cases, they cause all flowers and fruit to fall off, resulting in total crop failure, and the harm is extremely great.
Prevention and control methods: Spray pesticide for prevention and control starting at the flowering stage until the young fruit turns and droops. It can be sprayed 5-6 times a month. The pesticide can be trichlorfon or dichlorvos. When spraying, pay attention to the concentration of the pesticide. If the concentration is low, it will not kill the larvae, while if the concentration is high, the pesticide residue in the fruit will be too high and harm consumers' health.
4. Fruit fly
The fruit fly, commonly known as the needle bee, not only harms carambola but is also a common pest of many fruits. It also lays eggs on fruit-type plants, and after the eggs hatch into larvae, they harm the fruit, often causing the fruit to rot and fall off, leading to reduced yield. In severe cases, half of the fruit can be damaged, causing great losses to fruit farmers.
Prevention and control methods: Do a good job in orchard epidemic prevention to prevent the spread of pests. Strengthen management and inspect the orchard every day. When damaged fruit and fallen fruit are found, remove and collect them promptly and burn or bury them deeply in a centralized manner. During the period of incidence, spray specialized pesticides to trap and kill young adults.
The above are the common pest and disease prevention and control methods for carambola brought to you by Qinnong Net. The introduction to carambola pest and disease prevention and control methods ends here. If you want to learn more, please stay tuned to Qinnong Net.