Symptoms and Control Methods of Gummosis in Ornamental Peach

Symptoms and pathological changes: The disease occurs at branch forks, bark lenticels, wounds, cracks, and other locations. In the early stage, the diseased part swells slightly and turns brown, then exudes a translucent, milky-white, soft gummy substance. After rain, the gum flow becomes more severe. The gummy substance becomes viscous and yellow-brown when exposed to air, and after drying forms hard, lake-like gum blocks. The cortex and xylem of the affected part turn brown and rot, and are easily infected by saprophytic fungi. This disease is a non-infectious disease that occurs during the sap flow period, with heavier occurrence in summer. There are many factors that cause gummosis: frost damage, drought damage, sunscald, pests and diseases, mechanical injury, excessive pruning, injury during operations, and weakened tree vigor can all lead to the disease.

Control methods: 1. Timely control of trunk-boring pests; whitewash the branches and trunk in winter to prevent frost damage and sunscald, and avoid causing wounds. 2. Improve the soil, apply more organic fertilizer, irrigate and drain in a timely manner, and prune appropriately and in a timely manner to enhance plant vigor. 3. When gummosis is found, cut it out promptly, then apply lime sulfur mixture to disinfect the wound, and additionally use protective agents such as grafting wax or coal tar.

Control Methods for Gummosis in Ornamental Peach

In spring, soft transparent resin flows from the bark or bark cracks of the main trunk and main branches of ornamental peach. After the resin coagulates, it turns reddish-brown. This is a physiological disease called ornamental peach gummosis. Because the gum-flow site swells slightly, and the cortex and xylem turn brown and rot, it is susceptible to invasion by saprophytic fungi. At the same time, because gum flow consumes a large amount of nutrients, it often weakens tree vigor, with leaves turning yellow and small, and in severe cases flowering is sparse, and even branches and trunk die. Ornamental peachGummosishas many causative factors. Frost injury, freezing damage, damage from trunk-boring pests, mechanical injury, excessive pruning, improper fertilization, excessive rain, and soil that is too wet or too clayey can all easily lead to the occurrence of this disease.

Measures to control ornamental peach gummosis:

First, match the tree to the site. Ornamental peach should be planted in places where the soil is relatively loose, not too clayey, and has good drainage.

Second, pay attention to reasonable pruning. Pruning, whitewashing the trunk, preventing frost damage and sunscald, timely control of trunk-boring pests, and avoiding insect wounds.

Third, apply more organic fertilizer to strengthen tree vigor.

Fourth, inornamental peachdormant period, scrape off the gummy material at the gum-flow wound, disinfect the wound with 0.1% mercuric chloride water or 5 degrees Baume lime sulfur mixture, then apply sealing wax or coal tar.

How to Control Gummosis in Red-leaf Ornamental Peach

Red-leaf ornamental peach gummosis:It mainly occurs on branches and trunks, especially most easily at the forks, and gum flow also occurs on fruit and branches. The exuded gum is first light yellow and transparent; as the resin coagulates it gradually turns reddish-brown. The diseased part swells slightly, and the cortex and xylem turn brown and rot, with saprophytic miscellaneous fungi, tree vigor declining day by day, leaves small and yellow, and in severe cases branches and trunk die. There are many factors inducing this disease: frost, sunscald, insect pests, fungi, poor growth, or improper fertilization and winter pruning, and so on.

Control methods:Gummosis occurs most abundantly in spring. To prevent gummosis, the focus should be on strengthening tree vigor, and attention should be paid to avoiding various wounds. Before budding, scrape off the diseased part, apply 5 degrees Baume lime sulfur mixture, and then protect with other protective agents. In the early stage of the disease, you can use 50% compound carbendazim suspension 600-800 times dilution, or 70 wettable powder thiophanate-methyl wettable powder 600 times dilution, or 70 wettable powder chlorothalonil wettable powder 600 times dilution for spraying or smearing, once every 7-10 days, and 2-3 times in succession can bring it under control.