| Title: | Do Helicoverpa armigera Moths Signal Their Fecundity by Emission of an Antagonist? |
| Address: | "Department of Entomology, University of California Riverside, Riverside, CA, 92521, USA. gabriel.hughes@usda.gov. Department of Entomology, University of California Riverside, Riverside, CA, 92521, USA" |
| DOI: | 10.1007/s10886-019-01132-x |
| ISSN/ISBN: | 1573-1561 (Electronic) 0098-0331 (Linking) |
| Abstract: | "Female Helicoverpa armigera emit a pheromone, comprised of a 98:2 ratio of (Z)-11-hexadecenal to (Z)-9-hexadecenal, to attract males. It has been proposed that 'immature' female H. armigera modulate attraction of males by emitting an antagonist, (Z)-11-hexadecenol, along with pheromone during the first two nights of calling. However, it is unclear why females would call and simultaneously release pheromone and an antagonist. We conducted observations of female calling during the first five nights after adult emergence to determine periodicity. We also measured the relative abundance of (Z)-11-hexadecenol to the major component, (Z)-11-hexadecenal, on the surface of the gland of calling females and compared it to the ratio of these two compounds inside the gland over the first three nights after adult emergence to determine how much antagonist may be released. We found that young females (< 1-d-old) are unlikely to call and, based on the relative proportion of (Z)-11-hexadecenol on the gland surface, even if they did call would be unlikely to release sufficient (Z)-11-hexadecenol to diminish male attraction" |
| Keywords: | "Aldehydes/analysis/isolation & purification/pharmacology Animals Chromatography, Gas Female Fertility/*physiology Male Moths/*physiology Sex Attractants/analysis/*chemistry/pharmacology Sexual Behavior, Animal/drug effects Solid Phase Microextraction Ster;" |
| Notes: | "MedlineHughes, Gabriel P Carde, Ring T eng 15-8130-0597-CA/Animal and Plant Health Inspection Service/ 2019/12/20 J Chem Ecol. 2020 Jan; 46(1):21-29. doi: 10.1007/s10886-019-01132-x. Epub 2019 Dec 18" |
