2. Control method of rose black spot: 1. Pay special attention to removing fallen leaves and dead branches in winter, and spray 5 stone sulfur mixture. All diseased leaves and branches should be cut off and burned centrally to reduce the source of infection. 2. At ordinary times, strengthen cultivation management, apply more phosphorus and potassium fertilizers, and improve plant disease resistance. Spray water as little as possible during the onset period. If necessary, spray water only when the weather is clear in the morning and the temperature starts to rise, so as to avoid wetting the leaves for a long time. 3. Spraying 1000 times of 50% carbendazim wettable powder at the early stage of onset; Or spraying 50% mancozeb 1000 times; Or spraying 70% thiophanate methyl wettable powder 1000 times, all have effects.
Control method of rose rust: 1. Remove diseased buds in time and check from late March to April. If you find a diseased bud, take it out and cut it off immediately. Generally, the rate of diseased buds is less than 0.5%, and spores can be prevented from spreading after removal. 2. Before the two peak periods in early April or late August, spraying1-twice can control the development of the disease. You can choose 50% chlorothalonil 600 times solution; Or 500 times of 50% sterilization solution; Or 500 times solution of 50% thiram; Or 25% triadimefon wettable powder 1500 times. You can also spray 0 stone sulfur mixture before germination in spring; Or spray 0.2 stone sulfur mixture at the early stage of the disease.
Control measures of rose anthracnose: 1. In winter, pruning is combined to remove diseased branches and leaves, remove fallen leaves and destroy them centrally. Prevent frostbite, sunburn and various injuries. Strengthen water and fertilizer management, improve plant resistance, drain water in time after rain, maintain appropriate temperature and humidity, and reduce germs. 2. Early delivery: Su Jing 30ml, water 30kg, once every 7 days, 2-3 times in total. 3. Middle and late stage of the disease: Su Jing 50 ml+10- 15 ml garlic oil, 30 kg water, twice a day, 2-3 times in a row.
Control method of rose black spot: 1. In the growing season of flowers and trees, especially in spring, insecticides can be sprayed to control aphids and scale insects. Commonly used drugs are 1000 times of 40% omethoate EC or 1500 times of 50% triazophos EC. 2, the planting density is appropriate, which is convenient for ventilation and light transmission; Timely and moderate pruning of plants. 3. Spray 500-800 times of 45% amobam aqua, or 400 times of sterilization pills and other drugs at the onset.
Control method of rose nodule disease: 1. Before planting, soak the plant roots with concentrated streptomycin 500- 1000 times solution 10 minute. 2. When grafting, use a high-temperature disinfection knife or use wine to clear the poison to prevent nematodes from soaking into the wound. 3. Apply a mixture of methanol, glacial acetic acid and iodine tablets (50: 25: 10) to the affected area; Or spray the affected area with the mixed solution of sodium potassium dinitrate powder and lignin alcohol (20: 80) to make the tumor disappear. The cure rate of this method is only 60%, which is difficult to cure when the condition is serious. 4. Root water can be basically cured after 2-3 times irrigation with Ganeiling. 5. Cut off the nodule and develop Agrobacterium radiobacter A.radiobacterK84& with Japanese patent. #40; K84 bacteria for short; #4 1; Washing with bacterial liquid can give priority to colonization around the wound, and it can be cured for life without recurrence.
Control method of dead branches of Chinese rose: 1, completely cut off dead branches in autumn and winter and burn them centrally. Strengthen cultivation management and apply sufficient base fertilizer. 0. 13% urea solution can be sprayed during the growth period to promote plant growth. 2. Spraying 5-stone sulfur mixture during dormancy; Spraying 25% carbendazim wettable powder 600 times from May to June; Or spray 50% wettable powder (1000 times); Or spray 50% chlorothalonil wettable powder 500 times.
For teacher Yu's reference, I wish you good health [smiling face] [smiling face]
[smiling face] [smiling face]
Mm-hmm. Good night, Miss Yu?