Feeding by thrips, particulary Frankliniella occidentalis, can cause scarring on fruit. During bloom, thrips feed on pollen and small berries. The symptoms become visible after the development of the berries and are characterized by brown, elongated corky scars, sometimes causing the berry to crack and the seed to prolapse.
The MSU IPM Program maintains this site as an access point to pest management information at MSU. The IPM Program is administered within the Department of Entomology, fueled by research from the AgBioResearch, delivered to citizens through MSU Extension, and proud to be a part of Project GREEEN.