Melon thrips

Definition

A minute, pale-yellow thrips (order Thysanoptera) known scientifically as Thrips palmi, belonging to the family Thripidae. Native to Southeast Asia, it is a highly polyphagous pest of cucurbits, solanaceous crops, and numerous other plants, causing silvering, scarring, and deformation of leaves, flowers, and fruits through feeding and oviposition damage. It also vectors tospoviruses including watermelon silver mottle virus and melon yellow spot virus. The species has invaded tropical and subtropical regions worldwide and is a quarantine pest in many countries due to its rapid reproduction and resistance to insecticides.

Etymology

From the preferred host plants (melon and other cucurbits) plus 'thrips,' the common name for insects in order Thysanoptera

Example

Melon thrips feeding on cucumber seedlings produces characteristic silvery streaks along leaf veins and can stunt plant growth; heavy infestations during flowering cause fruit abortion and render remaining fruits unmarketable.

Synonyms

• palm thrips
• Thrips palmi

Related Terms

• Thysanoptera
• Thripidae
• tospovirus
• silvering damage
• quarantine pest
• polyphagy
• Integrated Pest Management
• insecticide resistance

Usage Notes

Often distinguished from western flower thrips (Frankliniella occidentalis) by its smaller size, paler coloration, and preference for humid tropical conditions; accurate identification requires microscopic examination of antennae and wing fringes. The common name is sometimes applied loosely to other thrips damaging melons, but properly refers only to Thrips palmi.