Dracaena plants are generally hardy and disease-resistant, but they can still be susceptible to a few common diseases and pests. Here are some of the most common Dracaena diseases and pests to look out for:

1. Spider mites: Spider mites are tiny pests that can cause damage to Dracaena plants by feeding on the leaves. They appear as small red or black dots on the leaves and can cause discoloration, curling, and yellowing of the leaves. To control spider mites, you can use an insecticidal soap or neem oil.

2. Mealybugs: Mealybugs are small, white insects that can infest Dracaena plants and cause yellowing and stunted growth. They leave behind a sticky residue, which can attract other pests and lead to fungal growth. To control mealybugs, you can use an insecticidal soap or alcohol solution.

3. Scale insects: Scale insects are small, oval-shaped insects that can cause yellowing and stunted growth of Dracaena plants. They appear as small, raised bumps on the leaves and stems. To control scale insects, you can use an insecticidal soap or oil.

4. Root rot: Root rot is a fungal disease that can affect Dracaena plants when the soil is too wet or poorly drained. It causes the roots to rot and can lead to wilting, yellowing, and leaf drop. To control root rot, you should remove affected plants from the soil, discard the infected soil, and repot the plant in fresh soil.

5. Leaf spot: Leaf spot is a fungal disease that causes small, brown spots on the leaves of Dracaena plants. It can be caused by overwatering, poor air circulation, or high humidity. To control leaf spot, you should remove affected leaves, improve air circulation around the plant, and avoid overwatering.

In summary, Dracaena plants can be susceptible to a few common diseases and pests like spider mites, mealybugs, scale insects, root rot, and leaf spot. By monitoring your plant regularly and taking prompt action to control any issues, you can help your Dracaena stay healthy and thrive.