Laboratory studies were conducted to identify the sex pheromone of Tyta luctuosa (Denis and Schiffermuller), a Eurasian noctuid moth that has been imported and released to aid in control of field bindweed, Convolvulus arvensis L. Using gas chromatography-mass spectrometry, together with electroantennogram and windtunnel bioassays of male moths, two compounds, (Z)-9-tetradecenal and (Z)-11-hexadecenal, were identified as the major pheromone components. Whole-gland extracts contained these components, as well as two other major compounds, (Z)-9-tetradecanol and (Z)-11-hexadecanol. However, the two alcohols were not detected in airborne emissions of calling females. Ratios of Z9–14:ALD to Z11–16:ALD were markedly different for whole-gland extracts and airborne emissions (1:3 and 2:1, respectively). Also, although the total amount of the two compounds varied nearly eight-fold among individuals (22–167 ng, mean 75 ± 56 ng [SD]) in gland extracts, the Z9–14:ALD/Z11–16:ALD ratio was relatively constant (0.3 ± 0.15). On average, calling females released 94 ng of Z9–14:ALD and 45 ng Z11–16:ALD per hour, with a mean ratio of 2.2. In wind tunnel tests, 69% of males exhibited complete upwind flights and touched the stimulus source in response to a synthetic pheromone blend that mimicked the female-produced Z9–14:ALD/Z11–16:ALD airborne concentration and ratio, as compared with 82% and 50% in response to calling females and pheromone gland extracts, respectively. Tyta luctuosa adults are vagile, and both adults and larvae are cryptic in the field-factors that make recoveries of released insects unlikely. Therefore, our data will contribute to the development of a pheromone-based monitoring tool to help assess colonization and establishment of this potentially useful weed biological control agent.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.