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(1) Scab: It is one of the major diseases of pears and apple trees. It damages shoots, leaves, fruits and fruit stems. Control methods: First, remove pathogens: remove fruit and leaves in time. Second, strengthen management: remove dense inner litchi, eliminate dense, over-prosperous, and upright branches in order to improve ventilation and light conditions. Third, chemical control: spraying 80% of Dasheng 45 before onset; spraying Fuxing after the onset of illness, or 65% of zeocin, or 50% carbendazim WP, etc., are alternately used, and the effect is better.
(2) Lee and apricot fluids: Prevention and control methods: First, strengthen tree management. Second, chemical control. For tree trunks that have undergone plastic flow, first use a knife to remove the plastic block and focus on burning; exposing the area covered by the glue block, and then use the knife to draw the road up and down, reach deep into the xylem, apply lime sulfur, or Bo doctor 783 and other smears Spots and their surroundings. Third, to avoid the damage caused by Daphne genk.
(3) Plum brown rot: Occurred in local orchards in recent years. Control methods: 1 Remove the disease. If the disease is found, it must be removed promptly and burned or buried deeply. 2 pest control disease. The pod borement caused by Listomia philippinarum on plum fruit is the main route of brown rot pathogen invasion. 3 spray protection. The focus is on the fruit's near maturity. 30 days before harvest, spraying chlorothalonil was better. 4 After the fruit is harvested, the orchard must be fully cleaned.
(4) Grape black bean disease: The leaves, fruits and shoots of infected grapes. Control methods: First, remove the source of the disease. Diseased leaves, diseased fruits, and diseased vines were promptly removed. Second, chemical control. Before the onset of illness, a half-time Bordeaux mixture was sprayed every 10 days or so and sprayed 2-3 times. After the onset of illness, carbendazim, chlorothalonil, or 70% thiophanate-methyl, etc., began to fight at the beginning of the disease and sprayed 2-3 times.
Summer disease prevention of fruit trees
The main diseases of fruit trees in summer are pear black spot disease, plum apricot fluid and grape black bean disease.