<h1>Fourth, glue disease</h1>
Flow gum disease is a branch disease that occurs in stone fruit trees and is more harmful. Its occurrence mechanism is not very clear, generally believed to be due to insect pests, mechanical damage, frost damage, sunburn, etc. caused by wounds, excessive pruning during the growth period, poor scion affinity, improper management and other factors that make the tree body weak.
Prevention and control methods:
(1) Strengthen comprehensive management, do a good job in the prevention and control of diseases and insect pests, and avoid wounds caused by mechanical damage, frost damage and sunburn.
(2) Improve the soil, increase the application of organic fertilizer, reasonably prune and control the appropriate load, etc., to enhance the tree potential and improve resistance.
<h1>Fifth, grasshoppers</h1>
The female is about 10 mm long, flattened oval, grass shoe-like, light purple-gray, covered with white wax powder; the oval, initially yellowish-white, gradually reddish brown, smooth; the nymph is similar to the female, only small, dark purple-gray.
(1) In autumn and winter, combined with turning over tree trays, fertilizing, etc., eradicate nymphs and eggs in the soil under the trees, weeds, etc., and burn them in a concentrated manner.
(2) Before the nymphs start to climb the tree, scrape off a circle of old coarse bark at a height of 65 cm in the trunk, and apply sticky shellac about 10 cm wide to stop the adults and nymphs from the tree.
(3) Spray 3 ° Be stone sulfur compound or 5% diesel emulsion before germination; spray 80% dichlorvos emulsion 1500 times liquid or marathon emulsion 1000 times liquid after germination.
<h1>Sixth, pear small heartworm</h1>
Also known as peach folding worm, pear fly fruit moth, mainly larvae to harm the fruit and new shoots. The adult body is grayish brown and dull; the eggs are oblong-oval, slightly raised in the center, yellowish-white, translucent, and shiny; the old mature larvae are yellowish-white or pink, and the head is yellowish-brown.
(1) Because pear small heartworms are multi-host pests and have the habit of transferring hazards, new orchards should try to avoid mixing with other fruit trees, and mixed fruit trees should strengthen prevention and control of their main hosts.
(2) Eliminate overwintering pests. The overwintering larvae are booby-trapped before fruit loss; the coarse and old skin is scraped off and burned intensively before germination in early spring; and the new shoots are cut off in time in May and June.
(3) Timely medication. Generally sprayed at the egg leaf rate of 1% to 2%, the commonly used agents are 20% methrin emulsion 2000 ~ 3000 times, 10% Uranus emulsion 6000 times liquid.
Cherry Cultivation Techniques The Encyclopedia of Cherry Varieties (Part 2) is accompanied by a video summary
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