AGLAONEMA - Disease and Pest Management

October 10, 2023

AGLAONEMA - Disease and Pest Management

Common Diseases:

  1. Leaf Spot: Leaf spot is a common issue in Aglaonema. It manifests as dark, irregular spots on the leaves. To manage leaf spot, remove affected leaves, increase air circulation, and avoid overhead watering. Fungicides may be necessary in severe cases.

  2. Root Rot: Overwatering or poorly-draining soil can lead to root rot. To prevent this, ensure that your Aglaonema is planted in well-draining soil and that you allow the top inch of soil to dry before watering again. If root rot occurs, prune affected roots and repot the plant in fresh soil.

  3. Powdery Mildew: Powdery mildew appears as a white, powdery substance on the leaves. Improve air circulation, maintain moderate humidity levels, and treat with a fungicidal spray to combat this fungal issue.

Common Pests:

  1. Spider Mites: These tiny arachnids can cause yellowing and stippling of leaves. Regularly inspect your Aglaonema for spider mites, and if infested, use insecticidal soap or neem oil to control them. Frequent misting can also help deter spider mites.

  2. Mealybugs: Mealybugs are small, cottony insects that tend to congregate in leaf joints and crevices. Isolate infected plants, remove mealybugs manually using a cotton swab dipped in rubbing alcohol, and treat with insecticidal soap or neem oil.

  3. Scale Insects: Scales appear as small, brownish or tan bumps on stems and leaves. Scrape them off gently with a soft brush or cotton swab soaked in alcohol. Repeat this process regularly to control their population.

Preventative Measures:

  1. Quarantine New Plants: When introducing a new Aglaonema to your collection, isolate it for a few weeks to ensure it is not harboring any pests or diseases that could spread to other plants.

  2. Maintain Proper Hygiene: Regularly clean the leaves with a damp cloth to remove dust and potential pest eggs. Trim and prune your Aglaonema as needed to improve air circulation.

  3. Optimal Growing Conditions: Provide your Aglaonema with the right environment. They prefer bright, indirect light, moderate humidity, and well-draining soil. Avoid extreme temperature fluctuations.

  4. Watering Carefully: Overwatering is a common issue with Aglaonema. Allow the top inch of soil to dry before watering, and always use pots with drainage holes to prevent waterlogging.

  5. Fertilize Sparingly: Avoid over-fertilizing, as excessive nutrients can stress the plant and make it more susceptible to pests and diseases.

Remember that disease and pest management for Aglaonema require patience and consistency. Regular monitoring and swift action when issues arise are key to maintaining the health and beauty of your Chinese Evergreen. By following these guidelines, you can keep your Aglaonema thriving and free from common problems.



Light Level: 1,500 – 2,500 fc

Nutrition: 100 – 150 ppm weekly

Soil Mix: Well-Draining Mix



Erwinia (Soft Rot of Leaf or Stem) - Dithane, Phyton27, Agrimycin

Fusarium (Stem Rot) - Medallion, Heritage, T-Methyl

Pythium (Root Rot) – Subdue, Truban, Aliette



Mealy Bug – Safari, Marathon, Talus, Distance, Flagship, Tristar

Aphids, Mites, Scale, Thrips – Mavrik, Orthene, Avid, Pedestal