How do mites damage leaves?

Mites primarily damage leaves by sucking sap from the plant tissues. This feeding method involves the use of specialized mouthparts that penetrate the leaf surface to access the vascular system, which is rich in nutrients. When mites feed on this sap, they remove essential sugars and water, which can lead to a variety of stress responses in the plant, including yellowing of the leaves, reduced vigor, and stunted growth. The cumulative effect of this sap removal can weaken the plant and make it more susceptible to other stress factors, including diseases and environmental conditions.

The feeding behavior of mites can also leave visible signs on the foliage, such as stippling or discoloration, which serves as indicators of their presence. Understanding this damage mechanism is crucial for effective pest management and for recognizing the symptoms of mite infestations early in order to take appropriate action.