An improved multi‐component sex attractant for trapping male western yellowstriped armyworm, Spodoptera praefica (Grote) (Lepidoptera: Noctuidae)

Abstract

1 Chemical analyses of solvent extracts of pheromone glands of female western yellowstriped armyworm moths Spodoptera praefica (Grote) indicated the presence of (Z)-7-dodecenol (Z)-7-dodecenyl acetate (Z)-9-dodecenyl acetate (Z)-9tetradecenyl acetate and (Z)-11-hexadecenyl acetate. 2 In field tests of combinations of these chemicals, small numbers of male S.praefica were captured in traps baited with (Z)-7-dodecenyl acetate. Numbers of males captured in traps were greatly increased in response to blends that included both (Z)-7-dodecenyl acetate with either (Z)-9-tetradecenyl acetate (Z)-9-dodecenyl acetate. The combination of (Z)-7-dodecenyl acetate and (Z)-9-tetradecenyl acetate provided the strongest sex attractant for use in trapping male S. praefica. 3 Males of the cabbage looper Trichoplusia ni (Hu¨bner) were captured in traps baited with blends possessing (Z)-7-dodecenyl acetate, and were greatly reduced in traps baited with blends that included (Z)-7-dodecenol. 4 Multi-component blends that included (Z)-7-dodecenol attracted males of the alfalfa looper Autographa californica (Speyer). 5 Males of Peridroma saucia (Hu¨bner) and Mamestra configurata Walker were captured in traps that included (Z)-9-tetradecenyl acetate with (Z)-11-hexadecenyl acetate. 6 These responses by other species of moths to S. praefica pheromone components and blends may still complicate the use of any lure for S. praefica.

Influence of semiochemicals present in the scales of Spodoptera frugiperda on chemotactic behavior of Trichogramma pretiosum

“…In the present study, Z11-16:OAC was released at 0.06 ng mg À1 , 29 less than Z9-14:OAC. This compound is also produced in several other species of moths, always as a minor component in the pheromonal mixture, e.g., in Spodoptera cosmioides (Walker) (Blassioli-Moraes et al, 2016), Spodoptera eridania (Cramer) (Teal et al, 1985), Spodoptera desconsi Lalanne-Cassou & Silvain (Monti et al, 1997), Spodoptera praefica (Grote) (Landolt et al, 2003), Spodoptera sunia (Guen) (Bestmann et al, Figure 6 Chemotactic responses (%) of Trichogramma pretiosum females (<24 h old) in a two-choice olfactometer to hexane (control) vs. 1, 0.1, or 0.01 lg ll À1 (Z)-9-tetradecenyl acetate (Z9-14:OAC) or (Z)-11-hexadecenyl acetate (Z11-16: OAC). The numbers inside the bars indicate the responding insects.…”

“…In the present study, Z 11‐16:OAC was released at 0.06 ng mg −1 , 2× less than Z 9‐14:OAC. This compound is also produced in several other species of moths, always as a minor component in the pheromonal mixture, e.g., in Spodoptera cosmioides (Walker) (Blassioli‐Moraes et al, 2016), Spodoptera eridania (Cramer) (Teal et al, 1985), Spodoptera desconsi Lalanne‐Cassou & Silvain (Monti et al, 1997), Sp odoptera praefica (Grote) (Landolt et al, 2003), Sp odoptera sunia (Guen) (Bestmann et al, 1988), and Spodoptera exigua (Hübner) (Mitchell & Tumlinson, 1994). Our study found that the response of T. pretiosum to this pheromone is dose dependent and that the proportion between the compounds may help them distinguish different hosts in the field.…”

Monitoring for Exotic Spodoptera Species (Lepidoptera: Noctuidae) in Florida

“…Pheromone components or blends have been identified for many of the species currently in the USA, including S. albula (Bestmann et al 1988-published as S. sunia Guenée), S. dolichos (Lalanne-Cassou et al 1994), S. eridania (Mitchell & Tumlinson 1994;Teal et al 1985), S. exigua (Deng et al 2004;Jung et al 2003;Mitchell & Tumlinson 1994), S. frugiperda (Tumlinson et al 1986;Batista-Pereira et al 2006), S. latifascia (Monti et al 1995) and S. praefica (Landolt et al 2003). Pheromone blends have been synthesized and are commercially available for S. eridania , S. exigua , S. frugiperda , and S. praefica .…”