1. Symptoms: The disease mainly occurs during the pumping period and the nursery stage of the stem, and the growth result period rarely occurs. The disease mainly damages stolons and petioles, and leaves, stipules, flowers and fruits can also be infected. At the early stage of the disease, the lesions were water-stained, spindle-shaped or oval-shaped, 3 to 7 mm, and later lesions turned black, or central brown, and red-brown edges. The lesions on the leaves and stolons of anthrax are relatively regular and orderly and easy to identify. The lesions on the stolons and petioles can expand into an annular ring, with the upper part wilting and dead.
2. Control methods: The prevention and control of the disease is very difficult, and prevention is the main measure. Should choose strong varieties of disease resistance, such as Baojiaoshengsheng, Fengxiang, early red light and so on. Avoid continuous nursery farms for many years and implement the rotation system as much as possible. Pay attention to the clear garden and timely remove diseased leaves, diseased stems, dead old leaves and other diseased residues and handle them properly. The agent can be sprayed with chlorothalonil 600 times for 3 to 5 times, or 0.4% for equal amount of Bordeaux for 2 times, and the spray time is best before the stem is used for pumping.
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