PHENYLPROPANOIDS AS ATTRACTANTS FOR ADULT STOMOXYS-CALCITRANS (DIPTERA, MUSCIDAE)

Rate of capture of stable flies, Stomoxys calcitrans (L.), on phenylpr opanoid-baited and unbailed sticky traps was determined in tests condu cted in a corn field and in grasses adjacent to a daily farm. Phenylpr opanoid compounds significantly increased capture in 2 of 4 tests in c orn. Captures were highest with 3-phenyl-1-propanol, followed closely by hydrocinnamaldehyde (3-phenyl-1-propanal), and more distantly by ci nnamyl alcohol. Both sexes were trapped, although males predominated a pproximate to 2:1. Compounds without apparent attractiveness were (E)- cinnamaldehyde, 4-propylphenol, and 3-(4-hydroxyphenyl)-1-propanol. In the test adjacent to a dairy, 3-phenyl-1-propanol attracted approxima te to 16 times more stable flies than did 3-(4-hydroxyphenyl)-1-propan ol or controls. The latter 2 treatments did not differ from one anothe r, but were significantly less effective than S-phenyl-1-propanol, whi ch captured 1.2 times more males than females. The results are discuss ed in relation to stable fly nectar- and host-seeking behaviors.