Control of pests and diseases in roses
As one of the most popular horticultural plants, roses often suffer from pests and diseases during their growth. This article focuses on the four typical problems of powdery mildew, downy mildew, aphids, and red spider, and systematically analyzes symptoms identification to control strategies to help flower friends achieve scientific prevention and control. Disease characteristics and incidence regularity of rose powdery mildew prevention and control plan The disease mostly occurs in young leaves. It is typically manifested as white powdery mildew spots on the leaves, which in severe cases leads to curled and deformed new buds. In spring and autumn, when the temperature difference between day and night is>10℃ and the humidity is>85%, it is easy to break out, and the bacteria spread very quickly through the air. Three-step treatment for prevention and treatment 1. Chemical prevention and control: Use 600 times of myclofenil and 800 times of chlorothalonil alternately, and spray it once every 7 days. Physical control: Spray water on leaves every morning to reduce bacterial activity 3. Horticultural management: prune the diseased branches in time and burn them, keep the plant spacing>40cm. Rose downy mildew coping strategies. Disease identification points appear on the leaves and quickly wither, and the flower stalks produce a gray mold layer. In a greenhouse environment, when the temperature is 15-20 ° C and high humidity continues, the disease spread rate can reach 3- 5 cm ² per day. Environmental control skills·Install circulating fans to maintain air circulation·Use drip irrigation technology instead of foliar sprinkler irrigation·Open windows in the morning and evening for ventilation for 2 hours to reduce humidity Comprehensive management of roses pest pests and control of roses
During the bud growth period, 2000 times solution of Shipianjing was sprayed mainly on the back of the leaves, and was used to physically trap and trap the insects with yellow sticky boards. Attention should be paid to avoiding the use of dichlorvos during flowering periods to prevent drug harm. Red spider prevention and control system establishes a three-level system of "prevention-monitoring-governance": 1. Spray matrine biological preparation every month 2. Inspect the dorsa of the lobe every week using a 20x magnifying glass 3. During the outbreak period, the incidence rate can be reduced by more than 50% through comprehensive measures such as establishing pest and disease monitoring logs, selecting disease-resistant varieties, and implementing ecological control. It is recommended that flower friends conduct professional plant protection consultation every quarter and formulate personalized prevention and control plans based on local climate characteristics.