How to prevent and cure powdery mildew of cut rose
Powdery mildew is one of the most important diseases of rose, damaging leaves, tender shoots, flower buds and flower stems. The control methods are as follows: strengthen cultivation management and remove the diseased bodies in time; prune in time, improve ventilation and light transmission conditions; nitrogen fertilizer should not be too much, and phosphorus and potassium fertilizer should be appropriately applied. For pesticide control, 2000~4000 times of 15% triadimefon WP or 1000 times of 50% metophoryl WP can be sprayed; 1000 times of 50% benlaite WP; 800~1000 times of 30% triflumiconazole (pay attention to self-protection);50% sulfur suspension (spray 200~300 times of solution when the disease first occurs, spray 400~500 times of solution when the temperature is higher than 30 ℃). In addition, sodium fluorosulfate is a poison bait, generally used at a concentration of 15%, to control pests.
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How to control rose diseases and insect pests
The most common diseases of rose are powdery mildew, black spot, branch blight, rust and so on. Dozens of insect pests may occur, the most common of which are shell insects, aphids, red spiders, thrips, stinging moths, saw leaf wasps and so on. In view of the above diseases and insect pests, we should step up efforts to prevent and control them. During the dormant period, pruning should also be carried out.
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Cultivation points of potted rose pomegranate
1.1 cutting period. Located in the Yangtze River basin, rose seedlings are mostly raised in spring and autumn, and spring begins in late April and ends at the end of May. Autumn begins in late August and ends at the end of October. Autumn cutting seedlings can not be divided into pots in the same year, young roots are underdeveloped, cold resistance is poor, it is necessary to do a good job of anti-freezing in winter. 1.2 potted soil.
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