How to prevent and control loquat scab? The latest methods are here

Among the common diseases of loquat, the one that is more serious and more widespread is loquat scab. This disease mainly damages loquat fruit, causing the fruit to become deformed and scarred, affecting quality and making it unmarketable, which can directly reduce economic returns. Therefore, preventing and controlling loquat scab is very important, so next we will introduce the causes and control methods.

1. Symptoms

It mainly damages the fruit, and also damages leaves and stems. It occurs commonly. After it occurs, the fruit shows brown rusty disease spots, and sometimes dense dark yellow fuzzy growth also appears on the fruit surface. When leaves are damaged, brown elongated fuzzy spots appear on the veins. After stems are damaged, symptoms similar to those on fruit also appear, except the disease spots are elongated. They mainly occur on young stems, and disappear as the stems age.

2. Causes

It is generally caused by infection with the loquat black spot fungus, spread by rain and insects carrying it. It can overwinter and oversummer on diseased fruit, stalks and leaves. Generally, the pathogen spreads and expands easily after rain. It can reproduce under warm conditions and cause damage through multiple generations. It generally invades directly from cells and causes damage.

3. Control methods

1. Clean the orchard

When the disease occurs, promptly prune off diseased fruit, diseased branches and young stems to prevent the pathogen from spreading and spreading within the orchard. Collect fallen fruit, fallen leaves and fallen branches together with the pruned parts and take them out of the orchard to burn. This operation can be carried out in all four seasons, but mainly after harvest.

2. Fertilization and water supply

Be sure to apply sufficient base fertilizer, and maintain sufficient fertilizer and water supply throughout the entire growth period to ensure the tree remains robust and in good condition, enhance the tree's resistance, and resist disease occurrence. Supply the needed nutrients in a targeted way at each stage.

3. Spraying

When there is no disease, spray Bordeaux mixture once a month, or chlorothalonil, to prevent disease occurrence. At the early stage of disease, 50% carbendazim can be used for control, with emphasis on improving symptoms. After disease occurs during fruit growth, use 70% mancozeb wettable powder 500 times solution, or 50% Tuzet wettable powder 600 times solution for spray protection and control, spraying once every half month, for two to three consecutive times.

The above is about the occurrence of loquat scab, its damaging symptoms and correct control methods. I hope everyone can learn how to identify the damaging symptoms of this disease so that they can use the corresponding control methods. At the same time, I hope everyone knows how to prevent and control this disease when they encounter it.