Citrus brown mite

The Citrus brown mite (Tegolophus australis) is a specialized pest belonging to the family Eriophyidae (order Trombidiformes). These mites are microscopic and worm-like in appearance, often remaining undetected until the visible damage to the host plant becomes significant and widespread.

This pest primarily attacks plants within the Rutaceae family, with a strong preference for cultivated citrus species such as lemons, oranges, and grapefruits. By piercing plant cells with their specialized mouthparts, they extract essential nutrients, causing localized cell death and disrupting the normal development of the plant tissue.

The life cycle of Tegolophus australis is heavily dependent on environmental conditions, particularly humidity and temperature. During the warmer months, the population can increase exponentially. The mites often congregate on tender new growth, as well as on fruit surfaces, where they complete their developmental stages rapidly.

The economic impact of this pest is primarily associated with the degradation of fruit quality. Infested fruits develop a characteristic russeted or brown appearance, making them unsuitable for the fresh market. Additionally, heavy infestations cause leaf curling, stunted growth, and a significant reduction in the photosynthetic capacity of the tree.

Effective management requires a combination of cultural and chemical strategies.

• Regular field scouting to detect early populations.
• Application of selective acaricides during peak periods of infestation.
• Pruning to remove heavily infested branches.
• Maintaining optimal plant nutrition to enhance natural defense mechanisms.