Cotton spider mite

Taxonomic position. The cotton spider mite (Oligonychus gossypii) belongs to the order Trombidiformes and the family Tetranychidae. It is a well-known agricultural pest that specializes in feeding on various plant tissues, particularly in arid and semi-arid agricultural regions.

Host plants. While the species is named for its primary association with cotton (Gossypium), it has a broader host range. It frequently infests a variety of legume crops, ornamental shrubs, and other plants in the Malvaceae family, often moving between different botanical hosts throughout the season.

Biology and life cycle. The life cycle comprises eggs, larvae, protonymphs, deutonymphs, and adults. These mites thrive in hot, dry conditions, which accelerate their development. A single generation can complete its cycle within 7 to 14 days, allowing populations to escalate rapidly under favourable environmental triggers.

Damage and economic impact. Mites use their piercing-sucking mouthparts to damage leaves, causing chlorosis, bronzing, and eventually necrosis. As damage progresses, the leaves drop prematurely, severely hindering the plant's ability to produce quality fibers or fruits, resulting in significant yield losses for farmers.

• Application of specific acaricides to manage outbreaks.
• Regular field scouting to detect mite colonies at an early stage.
• Maintaining optimal soil moisture to reduce plant stress.
• Encouraging natural predators such as phytoseiid mites.
• Destroying infested crop residues after harvest to prevent carry-over.