Caliothrips striatus

Systematic position. Caliothrips striatus is a species of thrips belonging to the order Thysanoptera and the family Thripidae. This insect is a significant agricultural pest known for its ability to damage a wide variety of plant hosts, feeding on cell sap and causing physiological stress to the infested plants.

Host plants and damage symptoms. This species is a polyphagous insect that attacks numerous vegetable, legume, and decorative crops. The damage manifests as pale, silvery spots on the leaves caused by the insects sucking cell contents. Over time, these spots coalesce, leading to severe leaf necrosis, leaf curling, and in extreme cases, total defoliation and death of the plant parts.

Biology and life cycle. The life cycle of Caliothrips striatus consists of egg, larval, prepupal, pupal, and adult stages. Warm and dry weather conditions significantly accelerate their reproduction. Adults and larvae are typically found on the underside of leaves. Pupation often occurs in the soil or in leaf litter, which provides a level of protection for the species against environmental changes and certain treatments.

Economic importance. The presence of this pest results in a reduced photosynthetic area, which directly impacts the plant's overall growth and final yield. The economic impact is pronounced in intensive farming systems where marketability is critical, as damaged leaves and fruit significantly depreciate in quality, making them unsaleable for human consumption or commercial use.

Protection measures. Managing populations of Caliothrips striatus requires an integrated approach that combines several strategies:

• Cultural practices such as weed control and crop rotation to disrupt the pest's life cycle.
• Monitoring with yellow sticky traps to detect early infestations.
• Biological control using natural predators or entomopathogenic fungi.
• Strategic use of registered insecticides when economic thresholds are reached, ensuring proper rotation of active ingredients to prevent resistance development.