I still remember the Spring Festival when I was a child, it was in the sound of shouting, a "rock sugar gourd", the voice is loud, the tail note is long ~
Hawthorn is also called mountain fruit, mountain red, its characteristics of hard core, thin flesh, slightly sour taste, can eat raw or as preserved fruit cake, dried can be used in medicine, is a unique Chinese medicinal fruit and fruit combined tree species, with blood lipids, blood pressure, cardiotonic, anti-arrhythmia and other effects, but also a good medicine for spleen appetizer, consumption of stagnation, blood sputum, chest diaphragm fullness, hernia, blood stasis, amenorrhea and other diseases have a good effect.
In recent years, with the increasing market demand, more and more people have grown hawthorns. Although hawthorn is very resistant to disease, this has led to many friends not preparing before planting, and when they encounter diseases, they are panicked and do not know how to prevent them. Today, let's take a look at the common diseases of hawthorn.
<h1 class="pgc-h-arrow-right" > hawthorn powdery mildew</h1>
Diagnostic points: harmful new shoots, young fruits, leaves and young shoots; initially faded spots, later covered with white powder; diseased tips are thin and twisted like rolls; and diseased fruits are deformed and cracked.
Pathogenic conditions: the pathogen overwinters on the diseased leaves or fruits with a closed capsule shell; infects after spring rains and spreads by air currents.
Prevention and control key: sweep the fallen leaves and burn them; pay attention to pastoral hygiene; spray hexazole, glutazole and other fungicides before germination and at the beginning of the disease.
<h1 class= "pgc-h-arrow-right" > hawthorn blight</h1>
Diagnostic points: fruit pile rot, fruit branches lose water and wither, dry and die, and dry shoots are not easy to fall off. The spots are dark brown, and the posterior dry and concave, dense gray-brown small grain spots. There are filamentous spore horns, and the junction between the diseased part and the healthy part is obvious.
Pathogenesis conditions: the pathogen is a weak parasitic bacterium; the branches are the source of initial infection; the next year the spots expand downwards, the spores are spread by wind and rain, and the wounds, dead branches, and dead shoots invade.
The key to prevention and control: strengthen cultivation management; increase the application of organic fertilizer and phosphorus and potassium fertilizer to enhance tree potential; combined with pruning, pruning, ventilation and light transmission; spraying fungicides before germination.
<h1 class="pgc-h-arrow-right" > hawthorn rust</h1>
Diagnostic points: harmful leaves, new shoots, fruits, etc.; primary orange-yellow small round spots, later enlarged; disease spots are slightly sunken, black small grain spots; leaf back hairy rust device, leaf dry and early fall.
Pathogenic conditions: the pathogen overwinters on the leaves or branches of juniper cypress with hyphae; the next spring produces a basidiospore, which is spread by wind and rain.
The key to prevention and control: cut off the surrounding transfer host, spray the fungicide on the transfer host before germination, and spray triazole fungicide at the beginning of hawthorn disease.
<h1 class= "pgc-h-arrow-right" > hawthorn rot</h1>
Diagnostic points: harmful branches; spots are reddish-brown, moist, dehydrated and shrunken in the later stages, and small black spots are produced on them, with tendrils-like spore horns.
Pathogenesis: The pathogen overwinters in the bark of the branches and trunks with conidia and ascomycete shells; it is spread by wind and rain.
Prevention and control key: protection of shear saws and branches, spring pruning and clearing of the garden, spraying of fungicides, preferred high concentration of Bordeaux liquid and 5 baumeric stone sulfur compound. Remove germs and reduce the amount of latent bacteria in the tree. In winter, the tree body is whitened at the right time, and in the spring, before the tree body germinates, the disease spots are scraped off, the diseased branches are cut off, and the orchard is destroyed. During the growing season, the fungicide is sprayed to prevent and control, remove the disease spots in time, and prevent the strong trees. Reasonable fertilization, reasonable irrigation, reasonable load, reasonable pruning, selection of cold-resistant and disease-resistant varieties.
<h1 class="pgc-h-arrow-right" > hawthorn dry rot</h1>
Diagnostic points: the spots are purple-red, irregular, later become gray-brown, dry and depressed, densely covered with small black spots, and have gray-white spore horns when wet.
Pathogenesis: the pathogen overwinters in the branch stems with conidia; wind and rain spread, wounds or skin holes invade.
The key to prevention and control: cultivate strong seedlings, strengthen cultivation management, and spray 800 times dilution of the immune yielding protein of the Pulutong ® plant (that is, 15g of pulutong ® with 12kg of water) to improve the disease resistance of the tree. Improve soil, improve water retention capacity, irrigation in the dry season, flood prevention in the rainy season. Trim properly and scrape off spots. The entire wound can be repeatedly rubbed with garlic, or sprayed with other fungicides to disinfect the wound. Liquid medicine fills the roots. It is generally best to do it twice throughout the year, once from late March to early April and once from late July to early August. Or at any time during the growth period of the fruit tree.
<h1 class="pgc-h-arrow-right" > hawthorn leaf spot disease</h1>
Diagnostic points: the initial brown, nearly rounded, clear and neat edges of the spot; late gray, irregular, scattered small black spots, can make the leaves yellow, early fall.
Pathogenesis: The pathogen overwinters on deciduous leaves as conidia or hyphae; wind and rain spread.
Prevention and control key: strengthen cultivation management, enhance tree potential, sweep fallen leaves, reduce the source of overwintering bacteria; spray fungal esters, chlorhein and manganese zinc.
<h1 class="pgc-h-arrow-right" > hawthorn flower rot</h1>
Diagnosis points: reddish brown or tan spot, when the weather is wet, the lesion appears white to gray white mold, causing the leaves, new shoots, young fruits and flowers to wither and rot, the surface of the young fruit has mucus overflow, and the rotten fruit has a lees smell.
Pathogenesis conditions: the pathogen overwinters in the form of pseudo-sclerotia on the grounded zombie fruit; the following spring, the ascomycete disc is produced from the diseased zombie fruit in the wet place of the ground, releasing ascospores and becoming the source of initial infection; spreading with the wind and re-infecting.
The key to prevention and control: remove the diseased fruit, turn the soil deep in the spring; disinfect the ground with azoxystrobin, pyrazole pyrimidate, methylthiobacteriazim, carbendazim, etc.; spray carbendazim once during the peak of flowering.
Remember to collect!