Movement of Phyllocnistis citrella (Lepidoptera: Gracillariidae) from a Grove to Traps and Sentinel Plants in Adjacent Land
Keywords:
citrus leaf miner, lure, infestation, sex pheromone, upwind flight, ‘Valencia’ orangeAbstract
Male Phyllocnistis citrella Stainton (Lepidoptera: Gracillariidae) were captured in pheromone- baited traps in pastureland 1.2 km west of an infested citrus grove. Capture of males was correlated with northeast wind blowing from the groves, which suggests males were transported passively on wind currents from groves before orienting to pheromone traps. Female P. citrella located and oviposited on 75% of sentinel citrus plants placed 1.2 km west of the groves by 6 weeks. Movement of this species as far as 1.2 km suggests that groves treated with pheromone components for mating disruption will be vulnerable to damage caused by mated females arriving from neighboring groves within 1.2 km. Treated groves may be particularly susceptible to influx of moths carried on wind.
Machos del minador de hojas Phyllocnistis citrella Stainton (Lepidoptera: Gracillariidae) fueron capturados en trampas de feromonas en pastizales hasta 1.2 kilometros al oeste de un huerto de cítricos. El número de los machos capturados en el pastizal disminuyó con el aumento de distancia de los huertos. La captura de machos fue correlacionada con un viento del noreste que sopló desde los huertos. Esto sugiere que los machos fueron transportados pasivamente por las corrientes de viento de los huertos antes de navegar en contra el viento hacia las trampas de feromonas. Las plantas de cítricos centinales colocadas 1.2 kilometros al oeste de los huertos se infestó en 6 semanas. Estos datos sugieren que la eficacia de perturbación sexual en P. citrella puede ser dependiente de la escala, con mejores resultados donde se trata en áreas más grandes.
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