The latest prevention and control of loquat scab disease

The most common disease of loquat is loquat scab, which mainly harms loquat fruit, causes fruit deformation and scarring, affects quality, does not sell, and can directly reduce economic benefits. Therefore, the prevention and control of loquat scab is very important, so I will introduce the etiology and control methods.

Symptoms of the disease

The main harm to the fruit, but also harm to leaves, stems, the occurrence of common, after the occurrence, the fruit shows brown rust spots, sometimes there will be clusters of dark yellow villi on the fruit surface. The leaf injury will appear brown long velvet spot in the leaf vein, and the stem will also appear the same symptoms as the fruit, but the disease spot is long, mainly on the tender stem, and the stem aging will disappear.

Second, the cause of the disease

It is generally caused by the infection of loquat Alternaria nigra, which can oversummer and winter on the diseased fruit stalks and leaves after being carried by rain-splitting insects. Generally, the pathogen is easy to spread after rain. It can reproduce under warm conditions and do harm for many generations. It is generally harmful from direct invasion of cells.

III. Prevention and control methods

1. Clear the garden

When a disease occurs, diseased fruits, diseased branches, and tender stems should be cut off in time to prevent the spread of germs in the park. Collect the fallen fruit, leaves and branches and take them out of the garden and burn them together. This operation can be carried out in four seasons, but mainly after harvest.

two。 Fertilization and water supply

We must apply enough base fertilizer and maintain an adequate supply of fertilizer and water throughout the growing period to ensure that the tree is strong and good, enhance the resistance of the tree, and resist the occurrence of diseases. Targeted supply of required nutrients at all times.

3. Spray medicine

When there is no disease, Bordeaux liquid or chlorothalonil can be sprayed once a month to prevent the disease. At the beginning of the disease, 50% carbendazim can be used for prevention and treatment, with emphasis on improving symptoms. During fruit growth, 500 times of 70% mancozeb wettable powder or 600 times of 50% bacilli wettable powder should be used for spray protection, once a half month, two or three times in a row.

The above is about the occurrence of loquat scab, the harmful symptoms and the correct control methods. I hope you can learn how to identify the harmful symptoms of this disease in order to use the corresponding control methods. At the same time, I hope everyone will know how to prevent and cure this disease.