Recent frequent rainfall has relieved the drought and promoted the growth of plants, which is conducive to fruit tree fruit enlargement. At the same time, the formation of high-temperature and high-humidity weather has created good environmental conditions for the infection of various pathogens. It is recommended that farmers strengthen the following management measures:
I. Pest control
Major diseases and pests of jujube trees include rotten fruit disease, anthracnose, fruit shrinking disease, rust disease, and late fruit cracking disease and peach borer; Apple's main pests and diseases are rotenia, anthracnose, dermatophyte, rust, early defoliation, and tip leaf roller moth. And leafminers; the major diseases and pests of pears are black spot, black spot, rot, pears, small catfish, pears, nettles, pears, and mealworms; the main pests and diseases of peach, apricot, plum, and plum are turbid, Aphids; The main diseases and pests of grapes are powdery mildew, downy mildew, soft rot, and two-spotted leafhoppers; the major pests and diseases of persimmon trees are round leaf disease, angular spot disease, and persimmon cotton.
For a variety of diseases can be used 45% prochloraz aqueous emulsion 2000 times or 10% fluorosiliconazole emulsion 2000 times liquid spray 10 days after the sterilization control, and then spray Bordeaux fluid protection. For fruit tree powdery mildew 50% triadimefon 600 to 800 times the liquid control; in mid-August to join 1 million international units of streptomycin for the prevention and treatment of jujube fruit disease; for downy mildew and grape soft rot can be used 50% of the epidermis 600 ~ 800 times liquid control; early apple defoliation and persimmon round leaf spot, angular spot with 70% thiophanate-methyl 1200 ~ 1500 times prevention and treatment; for split fruit disease can be added 500 times the fall to the United States calcium or magnesium calcium and other calcium Foliar fertilizer prevention; can be scraped off flow plastic for flow plastic disease, with carbendazim brush or white wet wipes for high humidity weather; 45% mancozeb manganese dioxide can be used to control the effect of bacterial perforation of peach leaves 600 times it is good. Note: The use ratio of copper sulphate:white ash:water in Bordeaux mixture is 1:2:200 on apples, pears and dates, 1:3:200 on persimmons, 2:1:200 on grapes, in apricots On the plum is 2:2:200, try not to use on the peach, use the time after the dew dry sunny morning 8 to 10 am or after 4 pm.
During the first half of August, after the larvae hatched, they were treated with 5% urea 1000-1500 times or 50% trichlorfon 1000 times to control peach borer, pear borer, apple leaf roller moth and leaf miner; Damaged orchards are treated with 50% Bromoxime 4000-fold solution; for Pygma pupa, Pear-tree worm, Tenebrio molitor, Two-star spot locust and various locusts, 70% imidacloprid 8000-10000 times, 2.5% high-chlorine 1500-fold Prevention and treatment; for persimmon cotton persimmon can be scraped off the old trunk half-length, and then several vertical bark bark, brushing 50 times dimethoate or 50 times acephate methamidophos solution coated with plastic cloth coated parts after prevention and treatment. The above control methods are all effective.
Second, fertilize and water
August 10 to 15 combined with rainfall in the jujube near the white mature stage of the application of 750 grams of potassium sulfate + urea 250 grams or Mushi high potassium fertilization 10 kg. Other fruit trees of late-maturing species Miao NPK balanced fertilizer 10 to 20 kg.
Third, cultivating and weeding, green manure, soil moisture, and soil organic matter
Fourth, trim
Remove all useless new branches of fruit trees and enhance light. Grab the grapes, remove the tendrils, and tie the vines. For more branches, the branches are tied to prevent sticking and bacterial infection.
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