Root weevils in the genus Otiorhynchus are cited as one of the most important pests in the major nursery and small fruit production areas throughout the United States, western Canada, and northern Europe. A major problem in combating weevil attack is monitoring and timing of control measures. Because of the night-activity of the adult weevils growers do not observe the emerging weevils in a timely manner and oviposition often starts before effective control measures are taken. Several vine weevil electroantennogram-active plant volatiles were identiÞed from a preferred host plant, Euonymus fortunei. Main compounds evoking antennal responses on the weevilsÕ antennae were (Z)-2-pentenol, (E)-2-hexenol, (Z)-3-hexenol, methyl benzoate, linalool, (E)-4,8-dimethyl-1,3,7- nonatriene, methyl eugenol, and (E, E)-_-farnesene. Several of these compounds were tested alone and in mixtures on attractiveness for the vine weevil Otiorhynchus sulcatus (F.) in Þeld-grown strawberry in Oregon. O. sulcatus were attracted to (Z)-2-pentenol (_3_ more than control) and a 1:1 ratio mixture of (Z)-2-pentenol and methyl eugenol (4.5_ more than control). This is the Þrst report of Þeld-active attractants for O. sulcatus which holds promise for the development of new monitoring strategies for growers in the near future
There are no comments yet. You can post the first one!
Post a comment
Please log in to use this service. Login as Wageningen University & Research user or guest user in upper right hand corner of this page.