What to do about the white bugs on Hongzhiyu cacti?
Hongzhiyu, as a star variety in the succulent world, often faces infestations of white bugs on its crystal-clear leaves. These pests, known scientifically as scale insects, not only affect the ornamental value but can also lead to plant death in severe cases. This article will systematically analyze the causes of pest infestations and provide three major prevention and treatment solutions to help you protect the health of your succulents.
In-depth Analysis of Hongzhiyu White Bug Disease
Identification of Pest Characteristics
Scale insects have a waxy secretion on their bodies, giving them a white frost-like appearance, often found in clusters on the back of leaves and at the junction of stems. Their excrement can cause sooty mold, forming black mold spots, which need to be distinguished from fungal diseases.
Causes of Pest Outbreaks
• Environmental factors: Poor air circulation + humidity >60% creating a stuffy and humid environment• Care mistakes: Excessive nitrogen fertilizer leading to overly tender new leaves + water accumulation in the leaf heart after watering• External infection: New plants not isolated + use of infested soil
Comprehensive Management Plan for Hongzhiyu Pest Control
Emergency Isolation Measures
Infested plants should be immediately moved to an isolated space, using a transparent storage box to create a quarantine area, maintaining 4 hours of scattered light per day, and observing continuously for 7-10 days.
Four-step Physical Pest Removal Method
1. Use a brush dipped in 75% alcohol to spot treat the pest bodies2. Use dental floss to clean the eggs in the leaf axils3. Use a spray bottle at a 45° angle to blast the plant4. Use a cotton swab dipped in soapy water (1:100) to wipe clean
Chemical Control Tips
It is recommended to alternate between using imidacloprid (diluted 1500 times) and mineral oil (diluted 200 times) for spraying, focusing on treating the surface of the potting soil. After application, cover with a transparent plastic bag and keep it airtight for 6 hours to enhance the penetration of the pesticide.
Key Points for Post-treatment Care
For 2 weeks after treatment, the watering frequency should be controlled, maintaining the medium moisture content at ≤30%. It is recommended to use the bamboo skewer method to test: insert the skewer 2/3 of the way into the potting soil, and if there is no wetness after 10 seconds, it is safe to add water.
Applying diatomaceous earth (1 cm thick on the surface) monthly can form a physical pest prevention layer, combined with regular inspections (recommended to check the back of the leaves on Wednesdays and Sundays) to establish a long-term protective mechanism.