| Title: | Effect of aging on pheromone emission from a commercial beet armyworm (Lepidoptera: Noctuidae) lure and trap efficiency |
| Author(s): | Showler AT; Salgado E; Fraser I; Robacker DC; |
| Address: | "USDA-ARS APMRU, Weslaco, TX 78596, USA" |
| DOI: | 10.1603/0022-0493-98.2.373 |
| ISSN/ISBN: | 0022-0493 (Print) 0022-0493 (Linking) |
| Abstract: | "The effect of aging on a commercial pheromone-based lure for attractiveness to male adult beet armyworms, Spodoptera exigua (Hubner), was assessed in terms of trapping efficiency and volatile emissions of two key components: (Z,E)-9,12-tetradecadienyl acetate and (Z)-9-tetradecen-1-ol. In field assays conducted in the Lower Rio Grande Valley, Texas, for 9 wk (June-August 2000) and for 8 wk (March-May) in Tamaulipas, Mexico, 0-1-wk-old lures collected greater than four-fold more male beet armyworm adults than lures that had been aged for 3-4 wk. Using solid phase microextraction and gas chromatographic analysis of the volatiles, mean (Z,E)-9,12-tetradecadienyl acetate emission declined by 32% after 5 wk of aging in a ventilated environmental chamber at 29.4 degrees C, 3.5% RH, to simulate subtropical summers. Mean (Z)-9-tetradecen-1-ol emission was reduced by 62% after 4 wk of aging. Under the tropical and subtropical conditions of this study, the capacity of the lure to attract moths into the trap declined after aging for 3 wk. The blend ratio (Z,E) -9,12-tetradecadienyl acetate: (Z)-9-tetradecen-1-ol declined 29% when the lure was aged for 5 wk. This study will assist in the development of a standard trapping system for assessing adult beet armyworm populations in the tropical and subtropical conditions to which the species is endemic" |
| Keywords: | Animals Insect Control/*methods Male *Pheromones/*chemistry Population Density Spodoptera/*physiology Time Factors Volatilization; |
| Notes: | "MedlineShowler, A T Salgado, E Fraser, I Robacker, D C eng England 2005/05/14 J Econ Entomol. 2005 Apr; 98(2):373-7. doi: 10.1603/0022-0493-98.2.373" |
