Seasonal Flight Patterns of the Omnivorous Leafroller 1 and Grape Leaffolder 2 in Central California Vineyards as Determined by Blacklight Traps 3

Abstract

Studies conducted in the vineyards of central California by using blacklight traps indicated 3 moth-catch peaks of the omnivorous leafroller, Platynota stultana Walshingham, during 1969 and 5 during 1970. Perhaps 1 or more flights were missed during 1969, because the study was discontinued earlier. There were 3 moth-catch peaks of the grape leaffolder, Desmia funeralis (Hubner), during both 1969 and 1970, which fact indicated the possibility of 3 distinct generations of this insect. About 85% of the omnivorous leafroller and 75% of the grape leaffolder trapped were males.