Pheromone-based disruption of citrus leafminer, Phyllocnistis citrella
Lukasz L. Stelinski, email@example.com, University of Florida, Entomology and Nematology, Citrus Research and Education Center, 700 Experiment Station Road, Lake Alfred, FL and Michael E. Rogers, firstname.lastname@example.org, University of Florida, Citrus Research and Education Center, 700 Experiment Station Road, Lake Alfred, FL.
The citrus leafminer, Phyllocnistis citrella Stainton (Lepidoptera: Gracillariidae) is a world wide pest of citrus described originally in India. The complete female-produced sex-attractant pheromone of the citrus leafminer was reported in 2006. Here we report promising results obtained in a 2007 spring and summer field trial of citrus leafminer control with the recently identified pheromone. Replicated plots of Hamlin orange, approximately 0.14 ha in size, were treated with citrus leafminer pheromone dispensers at densities of: 0 per hectare (0 per tree), 35 per ha (1 per 5 trees), 180 per ha (1 per tree), or 900 per ha (5 per tree). Male citrus leafminer capability of orienting to attractive pheromone point sources was monitored weekly with pheromone-baited sticky traps. In addition, infestation of leaf flush by citrus leafminer larvae was evaluated weekly. Male citrus leafminer capability of locating a source of pheromone was disrupted with increasing numbers of pheromone dispensers, with the highest disruption (>98 %), achieved with 900 dispensers per hectare. Furthermore, leaf flush infestation was reduced, particularly with the highest density treatment, despite the small size of test plots. Effective disruption was achieved despite using ca. 160 fold less pheromone than is commercially recommended for disruption of other pest moths, such as the Oriental fruit moth, Grapholita molesta. Although dispensers deployed for mating disruption were attractive to males, analyses of profiles of moth catch data versus dispenser density suggest that a non-competitive mechanism such as camouflage or desensitization mediated disruption in this case.
Species 1: Lepidoptera Gracillariidae Phyllocnistiscitrella (citrus leafminer)