What to Do When Chrysanthemums Have Pests
Chrysanthemums, as the autumn star flowers, often suffer from pest damage that affects their ornamental value. According to the Horticultural Association, 70% of chrysanthemum diseases are caused by pests, with aphids accounting for up to 58%. This article systematically analyzes the entire process of preventing and controlling chrysanthemum pests, from identification to eradication, guiding you step by step to create a healthy chrysanthemum garden.
Chrysanthemum Pest Identification and Treatment Plan
1.1 Analysis of Common Pest Types
Aphids (Chrysanthemum aphids) are the main source of harm, clustering on tender buds and flower buds to absorb sap. Red spiders (Tetranychus urticae) weave webs on the back of leaves, causing yellow spots and leaf drop. Whiteflies multiply rapidly in hot and dry conditions, requiring special attention to greenhouse environment monitoring.
1.2 Physical + Chemical Double-effect Pest Control Method
Immediately isolate pest-infested parts: ① Cut off the pest branches: Use scissors disinfected with alcohol, cut obliquely 2 cm below healthy tissue. ② Water jet washing: Use a 0.5 MPa water gun to wash the back of the leaves. ③ Pesticide selection: Organic cultivation recommends neem oil (10ml mixed with 1L water), chemical control can use imidacloprid (1:2000) sprayed weekly for 3 consecutive weeks.
Chrysanthemum Health Care System
2.1 Nutritional Regulation Plan
Apply NPK=12-12-12 slow-release fertilizer during the growing period, buried 50g per square meter. Increase application of monopotassium phosphate (800 times solution) during the bud formation stage to enhance resistance. Supplement chelated iron (1g/L) monthly to prevent chlorosis.
2.2 Key Points of Environmental Control
Ideal maintenance parameters: · Light: 4-6 hours of direct sunlight daily · Humidity: Maintain 55-65%RH · Ventilation: Ensure air flow above 0.3m/s · Soil EC value: Keep within 1.2-1.8mS/cm
Long-term Mechanism for Pest Prevention
3.1 Biological Control System
3.2 Quarterly Protection Calendar
By establishing a three-in-one protection system of pest monitoring, rapid response, and environmental control, the incidence of pests can be reduced by over 85%. It is recommended to use a pest management log to record data such as pesticide application time and pest density, and to combine with smart horticultural equipment for precise prevention and control.