A Detailed Guide to the Prevention and Control of Pests and Diseases in Aeonium arboreum 'Zwartkop'

Main disease: leaf spot

This disease mainly harms the leaves, and it spreads very easily, being transmitted through airflow, rainwater and other means. It can also overwinter on the surface layer of the soil, then revive the following year to harm the succulent. This disease can occur in all four seasons, but the most serious period is from August to September, when the temperature is relatively high. If the air in the growing environment does not circulate, and it is humid due to rainy days, this problem is very likely to appear.

Prevention and control methods

Improve the environment, strengthen air circulation, do not let water accumulate when watering, and do not let the soil layer remain overly wet for a long time. When the disease occurs, medication can be sprayed, and at the same time the plant should be isolated from other plants. Before winter arrives, remove the disease-affected parts, and also clean up the fallen leaves; the soil can be turned over appropriately. This reduces the chance of the disease overwintering on the soil surface.

Main pest: black vine weevil

When this pest occurs, it seriously affects the plant's ornamental value; they survive by gnawing on the plant's leaves. In serious cases, it can also cause other problems.

Prevention and control methods

When there are only a few, they can be caught by hand, or medication can be sprayed to kill them. In serious cases, the entire plant must be destroyed.