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- Title
Optimization of pheromone dosage for gypsy moth mating disruption.
- Authors
Tcheslavskaia, Ksenia S.; Thorpe, Kevin W.; Brewster, Carlyle C.; Sharov, Alexei A.; Leonard, Donna S.; Reardon, Richard C.; Mastro, Vic C.; Sellers, Patricia; Roberts, E. Anderson
- Abstract
The effect of aerial applications of the pheromone disparlure at varying dosages on mating disruption in low-density gypsy moth,Lymantria dispar(L.) (Lepidoptera: Lymantriidae), populations was determined in field plots in Virginia, USA during 2000 and 2002. Six dosages[0.15, 0.75, 3, 15, 37.5, and 75 g active ingredient (AI)/ha] of disparlure were tested during the 2-year study. A strongly positive dose–response relationship was observed between pheromone dosages and mating disruption, as measured by the reduction in male moth capture in pheromone-baited traps and mating successes of females. Dosages of pheromone 15 g AI/ha (15, 37.5, and 75 g AI/ha) reduced the mating success of females by>99% and significantly reduced male moth catches in pheromone-baited traps compared to untreated plots. Pheromone dosages<15 g AI/ha also reduced trap catch, but to a lesser extent than dosages 15 g AI/ha. Furthermore, the effectiveness of the lower dosage treatments (0.15, 0.75, and 3 g AI/ha) declined over time, so that by the end of the study, male moth catches in traps were significantly lower in plots treated with pheromone dosages 15 g AI/ha. The dosage of 75 g AI/ha was initially replaced by a dosage of 37.5 g AI/ha in the USDA Forest Service Slow-the-Spread (STS) of the Gypsy Moth management program, but the program is currently making the transition to a dosage of 15 g AI/ha. These changes in applied dosages have resulted in a reduction in the cost of gypsy moth mating disruption treatments.
- Subjects
VIRGINIA; LYMANTRIA dispar; PHEROMONES; LYMANTRIA; LEPIDOPTERA; AMBITION
- Publication
Entomologia Experimentalis et Applicata, 2005, Vol 115, Issue 3, p355
- ISSN
0013-8703
- Publication type
Article
- DOI
10.1111/j.1570-7458.2005.00266.x