Pest Control for Hibiscus
As a common ornamental plant for courtyard greening, hibiscus is deeply loved for its bright flowers and strong adaptability. However, pests such as aphids and golden beetles often affect their healthy growth. This article systematically sorts out four major pest control techniques to help you create a healthy flower scene.
Comprehensive Management Plan for Hibiscus Aphids
Pest Characteristics and Hazards
Aphids gather on tender branches to absorb sap, causing leaves to curl and turn yellow, and secrete honeydew that triggers sooty mold disease. May to September is the peak period, and it is necessary to check the back of leaves for eggs weekly.
Three-Step Scientific Control Method
1. Physical control: Spray high-pressure water in the morning to wash away the pest groups. 2. Biological control: Introduce natural enemies such as ladybirds. 3. Chemical control: Alternate use of 40% omethoate 1000 times liquid and 10% imidacloprid 2000 times liquid.
Key Control Techniques for White Star Golden Beetle
Adult Control Strategy
Adults like to eat flower buds and can be captured manually in the early morning. Set up vibration-type insect-killing lamps and hang sugar-acid solution traps (brown sugar:vinegar:water = 1:3:6).
Larva Eradication Plan
Deeply turn the soil in autumn and winter, and apply 5% phoxim granules (3kg/mu) to destroy the overwintering environment of grubs. Spray 40% omethoate emulsion before spring germination.
Other Common Pest Protection Systems
Red Spider Comprehensive Control
Prone to occur in dry seasons, with yellow and white spots on the leaves. It is recommended to use a mixture of 20% pyridaben emulsion 1500 times liquid and 0.5% urea solution for spraying.
Nocturnal Moth Ecological Control
Install sex traps (spaced 15 meters apart), plant repelling plants such as mint and rosemary. Spray Bt biological preparation (800IU/μl) during the larval stage.
By establishing a three-level prevention-monitoring-control protection system, combined with regular pruning (to maintain crown ventilation) and scientific fertilization (N:P:K=2:1:3), the pest resistance of hibiscus can be enhanced. It is recommended to establish a control log, recording each pest situation and disposal measures to provide data support for long-term maintenance.