Incidence of the law: L nematodes in the spring and autumn in the two infection period within a year, the male, egg or second-instar larvae in the disease in winter, to survive in soil or tumors more than a year. After the nematode invades the rose root, it can stimulate the proliferation of the root bark cells of the rose, resulting in cancerous lesions. Control methods: (1) Before planting, soak the roots of the plants with a 500-fold solution of new high fat film for 10 minutes. (2) When grafting, the general will be cleaned with a tree to prevent nematodes from immersing in the wound. (3) Apply the affected area with anti-corrosion film.
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