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Peach infective fluid gum disease: a disease caused by a fungus of the subphylum Tripynaea, which mainly damages the branches. There were two episodes of peak incidence in one year, from late May to late June and early August to mid-September.
Control methods: Spray 5 Baume degrees of lime sulfur or 50% of special WP wettable powder 800 times before sprouting in early spring to kill pathogens after winter, spray once every 10 days, and spray 3 times.
Spraying 72% of agricultural streptomycin sulfate 4000-5000 times in the early stages from the end of March to the beginning of April, spraying once every 7 days, spraying 2-3 times, and 50% of the special WP can also be used 800 times. Liquid or 50% carbendazim 800-1000 times, 50% thiophanate-methyl 1000-1500 times, spray once every 10 days, even spray 3-4 times.
During the vigorous growth of peach blossoms (between May and June), use 50% Tuzet WP 800 times, 70% Mancozeb WP 500 times, or 80% anthraquinone WP WP 800 times. , spray once every 7-10 days, even spray 3-4 times, the above pesticides are best used interchangeably. In winter, branches and trunks must be cut off, concentrated burned, and sprayed with lime sulfur to disinfect the trees.
How to control the problem of peach trees?
Peach non-invasive gum disease: mainly due to frost, frost damage, pests and diseases, damage, excessive or insufficient water, improper fertilization, excessive trimming, excessive results, soil viscosity or soil acidity caused by high causes. To prevent and treat the disease, we must first strengthen cultivation and management, increase tree vigor, pay attention to orchard drainage, increase organic fertilizer application, improve soil, reasonably trim, and reduce trunk wounds. At the same time, we must promptly prevent insect damage, especially peach aphid and peach aphid. The winter and spring branches are painted white, antifreeze and sunburn. In the early spring, the diseased area is scraped off. The wound can be coated with Baume 5 degree lime sulfur and then coated with white lead oil or coal tar.