What diseases and insect pests do loquat trees have? How to prevent and cure it?

What diseases and insect pests do loquat trees have? How to prevent and cure it? Also ask experienced netizens to help introduce loquat taste sweet, nutritious, there are a variety of fructose, glucose, potassium, phosphorus, iron, calcium and vitamins A, B, C and so on. Among them, the content of carotene was the third among all fruits. And loquat leaf is also a kind of traditional Chinese medicine, with large pieces of loquat leaf sun-dried as medicine, it has the function of clearing lung and stomach heat, reducing qi and resolving phlegm. Therefore, the farming network collates the harm and control methods of common diseases and insect pests of loquat trees, which are listed in detail below for netizens' reference. 1. Anthracnose of loquat tree: the harm of anthracnose to loquat tree: mainly harms the fruit. In the early stage of the fruit, the disease spot showed light brown dots, water stains, and later gradually became oval, dark brown, sunken spots, long dense light red dots, and then smaller black spots, arranged in the shape of concentric rings until rot. The pathogen overwintered on the diseased fruit with mycelium and produced spores in the following spring and spread by wind and rain. During the fruit ripening period, the damage is serious when it is high temperature and heavy rain. Prevention and control of anthracnose of loquat trees: combined with strengthening cultivation and management, diseased fruits were removed during pruning and burned centrally. At the initial stage of the disease, spray 1vev 200 times Bordeaux solution, or 80% Dasheng wettable powder 400-600 times, or 70% mancozeb powder 500 times, once every 10-15 days, more than 2 times in a row. Second, loquat leaf spot: the harm of loquat gray spot: in the leaf, the disease spot is light brown and round at the beginning, and then becomes gray-white, with a narrow dark-brown ring and gray-white to grayish yellow in the center. After the fruit was damaged, there were obvious sunken round purple-brown disease spots, with black spots scattered on the top. The disease spots that invade the leaves can be divided into two types: acute type and slow type. Acute type often causes leaf scorch and defoliation. The disease spot that invades the branch is similar to the branch rot, which can be divided into two types: glue type and dry type. Gray leaf spot can also damage fruits. The harm of loquat corner spot: the disease occurred on the leaves, with a small brown spot at the initial stage, followed by a polygonal shape and surrounded by a yellow halo ring. The disease spot is bounded by the leaf vein and mostly converges into a large disease spot with black mildew spots on it, that is, the conidiophores and conidia of the pathogen. The harm of loquat tree spot disease: the disease occurred on the leaves, small reddish brown spots appeared at the beginning, and then gradually expanded to form a round spot with grayish yellow in the center and reddish brown on the outer edge, and small black spots grew on the disease spot in the later stage, that is, conidia, sometimes arranged in a round grain, and most of the disease spots healed into irregular shape. The above three kinds of leaf diseases occurred all year round, the pathogen overwintered on the damaged leaves, and spread and infected by wind and rain in the following spring. Angular spot disease and gray spot disease are serious under drought conditions, and spot disease is prevalent in rainy season. Control methods of loquat leaf spot: clear the garden in winter, eliminate the source of bacteria, increase the application of potassium fertilizer, and improve stress resistance. Do a good job in cultivation and management such as ditching and drainage, drought resistance and so on. In the early stage of the disease, spray 1V 1v 200x Bordeaux solution or 65% Dysen zinc WP 600x, or 70% topazine WP 600,800x, or 50% carbendazim WP 800x-1000 times, every 10-15 days, 2-3 times continuously. Third, loquat leaf pollution disease: the harm of loquat leaf pollution disease: it mostly occurs on the back of leaves, dark brown round or irregular spots at the beginning of the disease, smoke-like mildew growing in the later stage, and finally the whole leaf is soot-like. Often get sick seriously after heavy rain or storm. The control methods of loquat leaf pollution disease are as follows: first of all, we should strengthen the tree potential, apply more phosphorus and potassium fertilizer, remove the diseased leaves in the field in time and reduce the source of the disease. In the early stage of the disease and the emergence of new shoots, 65% Dysen zinc wettable powder 600 times or 50% carbendazim wettable powder 800m 1000 times can be sprayed 2 times 3 times every 10 minutes for 15 days. 4. Yellow caterpillar: the harm of yellow caterpillar to loquat tree: yellow caterpillar is the most important pest of loquat, which harms tender leaves and buds with larvae, and can also eat old leaves, tender stems, epidermis, flowers and fruits when they occur for a long time. The leaves become notched after being damaged. In severe cases, the leaves of the whole plant are eaten, leaving only veins. The larvae are yellowish to orange, with hairy tumors on each topline and valves on both sides, and upper spiny hairs. Among them, there is a pair of obvious dark brown hairy tumors on the back of section 6, which is toxic. There are more than three generations in a year, the first generation occurs in May-June, the second generation in July-August, and the third generation in September-October. Overwintering with pupa in branches, bark gaps or on the back of leaves. The control methods of loquat yellow caterpillar: in addition to catching and killing larvae, pruning and picking cocoons in winter, protecting and utilizing natural enemies and parasitic wasps, spraying insecticides must be mastered during the initial hatching of larvae in spring, summer and autumn. The larvae can be killed by using 20% fenpropathrin EC 4000 times, 2.5% deltamethrin 4000 words 5000 times, 90% trichlorfon crystals 1000ml 1500 times or 50% fenitrothion EC 800 times. The characteristics of fertilizer requirement of loquat trees the method of making loquat trees bear more fruit