Managing Macrosteles near severini (Auchenorrhyncha: Cicadellidae) and Myzus persicae (Hemiptera: Aphididae) in Florida watercress

Authors

  • Hugh A. Smith University of Florida, Department of Entomology & Nematology, Gulf Coast Research and Education Center, Wimauma, Florida 33598, USA
  • Curtis A. Nagel University of Florida, Department of Entomology & Nematology, Gulf Coast Research and Education Center, Wimauma, Florida 33598, USA
  • Michelle S. Samuel-Foo University of Florida, IR-4 Program, Food and Environmental Toxicology Lab, Gainesville, Florida 32611, USA
  • Gary E. Vallad University of Florida, Department of Plant Pathology, Gulf Coast Research and Education Center, Wimauma, Florida 33598, USA

Keywords:

insecticide, Myzus persicae, sulfoxaflor, flonicamid, buprofezin, tolfenpyrad

Abstract

This is the first report of Macrosteles near severini Hamilton (Auchenorrhyncha: Cicadellidae), an invasive leafhopper, in Florida. The leafhopper was first detected in watercress in Florida in 2014. This leafhopper transmits the phytoplasma watercress aster yellows, which can cause significant yield losses. Insecticide trials were carried out in the spring of 2014 to compare the efficacy of buprofezin, flonicamid, flupyradifurone, sulfoxaflor, and tolfenpyrad, none of which were registered for use on watercress at the time of testing, with the grower standards of imidacloprid and spirotetramat, for management of M. nr. severini. All treatments except flonicamid resulted in statistically lower numbers of leafhopper nymphs than the untreated control after 3 or fewer applications. Efficacy data from this trial was provided in support of the registration of sulfoxaflor for watercress. Buprofezin and tolfenpyrad also demonstrated efficacy, and each possesses a mode of action that is distinct from imidacloprid and spirotetramat. In addition, flonicamid, sulfoxaflor, and tolfenpyrad demonstrated efficacy against Myzus persicae (Sulzer) (Hemiptera: Aphididae), an aphid pest of watercress.

 

Resumen

Este es el primer informe de Macrosteles cerca severini Hamilton (Auchenorrhyncha: Cicadellidae), una chicharrita (saltahoja) invasiva en la Florida. La chicharrita se detectó por primera vez en el berro de agua (Nasturtium floridanum) en Florida en el 2014. Esta chicharrita transmite el fitoplasma de amarillos del aster berro, que pueden causar pérdidas de rendimiento significativas. Se realizaron pruebas con insecticidas en la primavera del 2014 para comparar la eficacia de buprofezina, flonicamid, flupyradifurone, sulfoxaflor y tolfenpirad, ninguno de los cuales se ha registrado para su uso en berro en el momento de la prueba, con los estándares de cultivadores de imidacloprid y espirotretramat, para el manejo de M. nr. severini. Todos los tratamientos, menos flonicamid, resultaron en números estadísticamente menores de ninfas de las saltahojas que el testigo no tratado después de 3 o menos aplicaciones. Los datos de eficacia de este ensayo fue para apoyar el registro de sulfoxaflor de berros. Buprofezina y tolfenpirad también demostraron la eficacia, y cada uno posee un modo de acción que es distinto de imidacloprid y spirotetramat. Además, flonicamid, sulfoxaflor y tolfenpirad demostraron eficacia contra Myzus persicae (Sulzer) (Hemiptera: Aphididae), un pulgón plaga de los berros.

 

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Published

2016-12-31

Issue

Vol. 99, No. 4 (December 2016)

Section

Research Papers

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