University of California

Timing of halo spotting by flower thrips on table grapes


Fred Jensen

Publication Information

Hilgardia 27(10):6-8. DOI:10.3733/ca.v027n10p6. October 1973.

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Flower thrips oviposit in newly developing grape berries and produce a halo spot. The halo spot consists of a small dark scar surrounded by whitish tissue. If too numerous, these halo spots either reduce the grade of table grapes or result in their being culled. Fortunately only a few varieties such as Almeria, Calmeria and Italia are ordinarily affected. The greatest damage potential occurs with Italia since the skin may split at the site of a halo spot during ripening and lead to bunch rot.

Jensen F. 1973. Timing of halo spotting by flower thrips on table grapes. Hilgardia 27(10):6-8. DOI:10.3733/ca.v027n10p6
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