Flower thrips nymphs involved in scarring of Thompson seedless grapes
Authors AffiliationsFred Jensen is Extension Viticulturist, San Joaquin Valley Agricultural Research and Extension Center, Parlier; Don Luvisi is Farm Advisor, Kern County.
Hilgardia 27(10):8-9. DOI:10.3733/ca.v027n10p8. October 1973.
Trials conducted in Kern County Thompson Seedless vineyards in 1972 showed that flower thrips nymphs, feeding under persisting caps (calyptras), are associated with the sunburst or starfish scars which have proved troublesome in recent years. The gibberellin sprays used in producing table Thompsons, accentuate this damage.
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