Toxicity for control of Frankliniella schultzei and Selenothrips rubrocinctus (Thysanoptera: Thripidae) of several common synthetic insecticides
Abstract
Thrips are serious pests of several kinds of crop plants throughout the world. Their attack leads to loss in plant production. Common blossom thrips, Frankliniella schultzei (Trybom), and red-banded thrips, Selenothrips rubrocinctus (Giard) (both Thysanoptera: Thripidae), are serious insect pests attacking various plants, such as tomato (Solanum esculentum Miller [Solanaceae]), mango (Mangifera indica Linnaeus [Anacardiaceae]), avocado (Persea americana Miller [Lauraceae]), and lotus flower (Nelumbo nucifera Gaertn. [Nelumbonaceae]). Currently, basic thrips control relies on synthetic insecticides. However, the toxicity of each existing insecticide for control of some specific pest species still has not been well established. This study evaluated and reported the toxicity of 6 insecticides (chlorantraniliprole, cypermethrin, carbosulfan, fipronil, abamectin, and spinetoram) for control of the 2 thrips species mentioned above. The evaluation was done by exposing 10 thrips to a bean dipped in insecticide, and mortality was recorded after 24 h of exposure under laboratory conditions. Spinetoram was the most toxic to F. schultzei with an estimated LC50 of 0.05 ng per µL. For red-banded thrips, S. rubrocinctus, the most toxic insecticides were abamectin, spinetoram, and fipronil, with LC50 values of 1.67, 1.85, and 4.23 ng per µL, respectively. On the other hand, the least toxic insecticide to common blossom thrips and red-banded thrips was chlorantraniliprole, with LC50 values of 270.51 and 641.08 ng per µL, respectively. Overall, among the tested chemicals, spinetoram was the most effective in controlling these pests. The findings from this study will benefit developers of insecticide management strategies in thrips control programs.
Resumen
Los trips son plagas importantes de varios tipos de plantas de cultivo en todo el mundo. Su ataque conduce a pérdidas en la producción vegetal. El trips común de las flores, Frankliniella schultzei (Trybom), y el trips de bandas rojas, Selenothrips rubrocinctus (Giard) (ambos Thysanoptera: Thripidae), son insectos plaga de graves que atacan a varias plantas, como el tomate (Solanum esculentum Miller [Solanaceae]), el mango (Mangifera indica Linnaeus [Anacardiaceae]), aguacate (Persea americana Miller [Lauraceae]) y laflor de loto (Nelumbo nucifera Gaertn. [Nelumbonaceae]). Actualmente, el control básico de los trips se basa en insecticidas sintéticos. Sin embargo, aún no se ha establecido bien la toxicidad de cada insecticida existente para el control de algunas especies de plagas específicas. Este estudio se evaluó y se informa sobre la toxicidad de 6 insecticidas (clorantraniliprol, cipermetrina, carbosulfán, fipronil, abamectina y spinetoram) para el control de las 2 especies de trips mencionadas anteriormente. Se realizó la evaluación exponiendo 10 trips a un frijol sumergido en insecticida y se registró la mortalidad a las 24 horas de exposición en condiciones de laboratorio. El espinetoram fue el más tóxico para F. schultzei con un valor CL50 estimada de 0,05 ng por µL. Para el trips de banda roja, S. rubrocinctus, los insecticidas más tóxicos fueron abamectina, spinetoram y fipronil, con un valor de CL50 de 1,67, 1,85 y 4,23 ng por µL, respectivamente. Por otro lado, el insecticida menos tóxico para el trips común de las flores y el trips de banda roja fue el clorantraniliprol, con un valor de CL50 de 270,51 y 641,08 ng por µL, respectivamente. En general, entre los productos químicos probados, el spinetoram fue el más efectivo para controlar estas plagas. Los hallazgos de este estudio beneficiarán a los desarrolladores de estrategias de manejo de insecticidas en los programas de control de trips.
Key Words: chemical control; spinetoram; abamectin; efficacy; thrips; pest
View this article in BioOne https://doi.org/10.1653/024.105.0208
Downloads
Published
Issue
Section
License
Copyright for any article published in Florida Entomologist is held by the author(s) of the article. Florida Entomologist is an open access journal. Florida Entomologist follows terms of the Creative Commons, Attribution Non-Commercial License (cc by-nc). By submitting and publishing articles in Florida Entomologist, authors grant the FOJ and Florida Entomologist's host institutions permission to make the article available through Internet posting and electronic dissemination, and to otherwise archive the information contained both electronically and in a hard printed version. When used, information and images obtained from articles must be referenced and cited appropriately. Articles may be reproduced for personal, educational, or archival purposes, or any non-commercial use. Permission should be sought from the author(s) for multiple, non-commercial reproduction. Written permission from the author(s) is required for any commercial reproduction.