Mango leaf blight, also known as Alternaria alternata, is attributed to fungal diseases. What are the damages caused by leaf blight on mangoes? What is the cause of mango leaf blight? How to control mango leaf blight?
First, the symptoms and damage of mango leaf blight
Mango leaf blight mainly damages the leaves of fruit trees. Mango seedlings and mango saplings are most prone to attack. In the early stage of the disease, the leaves are grayish brown to dark brown to irregularly shaped lesions, and then developed into leaf tips or leaves. When the edge is dry, the leaves are abruptly dead, which affects the growth of the plants. Sometimes the petiole also produces some brown spots, which are easy to cause leaves.
The onset of leaf blight causes the leaves of mango trees to prematurely decay, dry up and fall, and weaken the tree.
Second, the spread of mango leaf blight and the cause of the disease
1. Mango leaf blight usually overwinters on old leaves or diseased leaves on trees. After the spring rain, hyphae is conveyed by wind and rain, and it is most likely to infect mango grass leaves.
2, because the dry season or air humidity is high, lack of fertilizer is easy to attack leaf blight, such as training can not keep up and old mango garden is also prone to disease.
3, because of the differences in the resistance of mango species, such as purple flowers, cinnamon, ivory and ivory are more susceptible.
Third, mango leaf blight prevention and control measures
1. Choose the type of mango that is resistant to disease.
2. Do a good job of draining the orchard during the dry season and adhere to the appropriate humidity in the garden.
3. Scientifically pruning fruit trees, improving ventilation and light transmission.
4, in combination with pruning, the diseased leaves, old leaves, fallen leaves are concentrated and burned. Add organic fertilizer, phosphorus and potassium fertilizer to the fruit trees to enhance the tree potential.
Led Downlight,Led Square Plastic Recessed Light,Recessed Led Downlight,Led Round Recessed Downlight
Foshan Extrlux Co., Ltd. , https://www.extrlux.com