Multisetose spider mite

Systematic position: Tetranychus multisetis belongs to the order Trombidiformes and the family Tetranychidae. These mites are well-known agricultural pests that thrive in warm conditions, causing severe damage to a variety of cultivated plants by feeding on cell fluids.

Host crops: This mite species is a polyphage. It infests a wide range of botanical families, posing significant threats to vegetables, ornamental plants, and various industrial crops in both greenhouses and open field environments.

Biology and lifecycle: The development of Tetranychus multisetis is highly influenced by climatic factors. Hot and dry weather significantly accelerates their reproductive cycle, allowing populations to reach outbreak levels in a very short time. They typically overwinter as hibernating females in debris, soil, or sheltered structures.

Nature of damage and economic importance: Mite feeding leads to chlorosis and subsequent necrosis of leaf tissue. By piercing the plant cells and draining the contents, they reduce the photosynthetic capacity of the plant. Heavy infestations manifest as webbing on leaves and stems, resulting in significant yield losses and lower product quality.

• Monitor crops frequently, focusing on the undersides of leaves for signs of infestation.
• Maintain proper field sanitation to remove overwintering sites for the mites.
• Implement chemical control using specific acaricides while rotating active ingredients to prevent resistance.
• Use biological controls such as predatory mites to maintain balance in greenhouse systems.
• Adjust irrigation practices to prevent drought stress in crops, which is often a key factor favoring mite outbreaks.