Abstract

Olives are a potential emerging crop for the state of Florida, USA, and the pest arthropods in commercial groves in the state are under-studied. Thrips (order Thysanoptera) are an almost ubiquitous concern among specialty crop growers in Florida. Yellow and blue sticky card traps were used to survey the canopies of trees in 4 North Central Florida olive groves to determine thrips abundance and distribution over 2 growing seasons. Of the 16 species of thrips identified, most were Frankliniella spp., with Florida flower thrips, Frankliniella bispinosa (Morgan) (Thysanoptera: Thripidae), being the most abundant species for both yr. Yellow traps were more effective for most species of thrips, although several species were more abundant on blue traps. No consistent differences between yr existed. Although overall abundance of flower feeding thrips species coincided with flowering events in the olive orchards, there was insufficient flowering to make statistical correlations between the peak of thrips abundance and flowering events in the olive groves. The results of this study will be useful in informing future economic threshold analyses of Thysanoptera in Florida olive groves. Resumen Las aceitunas son un cultivo potencial emergente para el Estado de la Florida, EE. UU., y los artropodos plagas en los bosques comerciales del estado estan poco estudiados. Los trips (orden Thysanoptera) son una preocupacion casi omnipresente entre los productores de cultivos especializados en la Florida. Se usaron trampas adhesivas amarillas y azules para examinar las copas de los arboles en 4 olivares del norte central de la Florida para determinar la abundancia y distribucion de trips durante 2 temporadas de crecimiento. De las 16 especies de trips identificadas, la mayoria fueron Frankliniella spp., con el trips de flores de la Florida, Frankliniella bispinosa (Morgan) (Thysanoptera: Thripidae), siendo la especie mas abundante para ambos anos. Las trampas amarillas fueron mas efectivas para la mayoria de las especies de trips, aunque varias especies fueron mas abundantes en las trampas azules. No existieron diferencias consistentes entre los anos. Aunque la abundancia general de especies de trips que se alimentan de las flores coincidio con los eventos de floracion en los huertos de olivos, no hubo suficiente floracion para hacer correlaciones estadisticas entre el pico de abundancia de trips y los eventos de floracion en los olivares. Los resultados de este estudio seran utiles para informar futuros analisis de umbral economico de los Thysanoptera en los olivares de la Florida. Key Words: thrips; flower pest; Frankliniella bispinosa; Homalodisca vitripennis; olives; Olea europaea View this article in BioOne

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