Title:	What is the relationship between efficacy of seed treatment with insecticides against Dalbulus maidis (Delong and Wolcott) (Hemiptera: Cicadellidae) healthy and infected with spiroplasm in the corn stunt control?
Authors:	REDOAN, A. C. M. MARQUES, V. M. PEREIRA, P. S. OLIVEIRA, I. R. de SILVA, D. D. da COTA, L. V. FADINI, M. A. M. OLIVEIRA, C. M. de RAFAEL, D. D. MENDES, S. M.
Affiliation:	ANA CAROLINA M. REDOAN VINICIUS M. MARQUES, UNIVERSIDDE FEDERAL DE SAO JOAO DEL-REI POLIANA S. PEREIRA IVENIO RUBENS DE OLIVEIRA, CNPMS DAGMA DIONISIA DA SILVA ARAUJO, CNPMS LUCIANO VIANA COTA, CNPMS MARCOS ANTONIO M. FADINI, UNIVERSIDADE FEDERAL DE SAO JOAO DEL-REI CHARLES MARTINS DE OLIVEIRA, CPAC DIEGO D. RAFAEL SIMONE MARTINS MENDES, CNPMS.
Date Issued:	2025
Citation:	Insects, v. 16, n. 7, 713, 2025.
Description:	Seed treatments with insecticides are important tools for managing corn stunting disease complex (CSDC) transmitted by Dalbulus maidis (Hemiptera: Cicadellidae) by reducing the initial leafhoppers’ population and, consequently, the risk of pathogen transmission. We evaluated the effect of insecticides used in seed treatment on both healthy and spiroplasmainfected leafhoppers, the persistence of the seed treatment effect on disease symptom severity, and its impact on corn productivity. At the V2 stage, imidacloprid/thiodicarb was the most effective, resulting in 100% mortality of healthy leafhoppers and 85.7% mortality of infective ones, thus preventing spiroplasma transmission. Thiamethoxam and methomyl + fipronil/thiamethoxam showed a high total mortality after 72 h, but only for the infective leafhoppers, with a total mortality of healthy leafhoppers around 40%, reducing the number of plants with symptoms by 80% and 90%, respectively. Our results prove that there is a difference between the chemical molecules and that the infected leafhoppers are more susceptible. Insecticide seed treatment was effective until the V2 growth stage, and imidacloprid/thiodicarb was the most effective product tested. Infective leafhoppers were more susceptible to insecticide seed treatments, and the infestation by the corn leafhopper carrying spiroplasma in the early stages of plant development heavily reduced corn yield.
Thesagro:	Controle Químico Zea Mays Cigarrinha Bactéria Milho
Keywords:	Manejo integrado
DOI:	https://doi.org/10.3390/insects16070713
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPMS)