Seasonal Abundance of Synanthedon pictipes and S. exitiosa in North Central Florida 12

Abstract

The number of lesser peachtree borers, Synanthedon pictipes (Grote and Robinson), captured in 1976 in north central Florida in sticky traps baited with ( E,Z )-3, 13-octadecadien-1-ol acetate increased from 0 in Jan. to ca. 120/trap per week in Feb. and Mar. and remained high and stable through Oct. Populations declined rapidly in Nov. In Jan. 1977, the temperature, which was ca. 2° lower than normal, probably caused the 1st flight of S. pictipes males in the peach and nectarine orchards and woods to be later than in 1975 and 1976; however, populations after Feb. 1977 were comparable to populations in 1975 and 1976. During Apr.–Aug. 1975 low numbers of peachtree borers, Synanthedon (= Sanninoidea ) exitiosa (Say) (0–6/trap per week) were taken in traps baited with ( Z,Z )-3,13-octadecadien-1-ol acetate. In 1976 and 1977, the 1st moths were collected during Apr. and May and peak populations occurred during Sept. and Oct.