Garlic rust has a greater impact on garlic quality and yield. To effectively control the disease, we must correctly grasp the methods of identification and prevention. Garlic rust is caused by the infestation of onion rust. In addition to invading garlic, it also infects onions such as chives. The bacteria mainly invade leaves and pseudostems. At the beginning of the disease, a fusiform chlorotic spot appeared. Afterwards, a round or slightly convex uredia spores appeared under the epidermis. After the epidermis ruptured, orange-yellow powders were scattered, namely the summer spores. There are yellow halos around the lesions, and the posterior lesions cause the whole leaves to be dry and the plants die prematurely. In the late growth period, the uncracked uredia spores overwinter on leave-seeded onions and overwintering green onions and garlic disease tissues. In the summer of the following year, many infections occurred in the summer, which was a time when the garlic was formed or inflated. The damage was severe. Garlic infests onions or Other plants after harvest. When the temperature is high, hyphae are increasingly in the diseased tissue. In cold summer or high humidity areas, the disease is easy to spread. Control methods: selection of disease-resistant varieties. Such as purple skin garlic, Xiaoshikou in garlic, Shucheng garlic more resistant, the cause of choice. Avoid mixing onions and garlic, pay attention to clean the garden to reduce the initial infection source. Timely late sowing, to prevent defertilization, to avoid partial nitrogen fertilizer, reduce the number of irrigation, eliminate flood irrigation. In case of continuous rain in early spring, we must promptly check the onset of the disease and spray medicine to prevent it. Chemical control: 25% triadimefon wettable powder 1500 times, 70% mancozeb wettable powder 1000 times. Every 10-15 days control 1 time. Prevention 1-2 times.
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