Foliar Spraying of Tomato Plants with Systemic Insecticides: Effects on Feeding Behavior, Mortality and Oviposition ofBemisia tabaci(Hemiptera: Aleyrodidae) and Inoculation Efficiency of Tomato Chlorosis Virus

Autor(es)

Maluta, Nathalie Kristine Prado ^[1] ; Lopes, Joao Roberto Spotti ^[2] ; Fiallo-Olive, Elvira ^[3] ; Navas-Castillo, Jesus ^[3] ; Lourencao, Andre Luiz ^[1]

Afiliação do(s) autor(es)

^[1] Ctr Fitossanidade, Agron Inst IAC, BR-13020902 Campinas, SP - Brazil

^[2] Univ Sao Paulo, ESALQ, Dept Entomol & Acarol, BR-13418900 Piracicaba, SP - Brazil

^[3] Univ Malaga, CSIC, Inst Hortofruticultura Subtrop & Mediterranea La, IHSM, UMA, Malaga 29750 - Spain

• Tipo de documento: Artigo Científico
• Fonte: INSECTS; v. 11, n. 9 SEP 2020.
• Citações Web of Science: 1

Resumo

Simple Summary The whiteflyBemisia tabaci(Hemiptera: Aleyrodidae) causes serious losses to vegetable, ornamental and fiber crops, including tomato plants, mainly as a vector of economically important viruses. Among the most important viruses affecting tomato is the tomato chlorosis virus (ToCV) (Closteroviridae: Crinivirus), which is semi-persistently transmitted by whiteflies. Effective management of this pest is crucial to reduce the spread of vector-borne diseases and to reduce crop damage and losses. In this study we evaluated the effect of systemic insecticides (cyantraniliprole, acetamiprid and flupyradifurone) on the feeding behavior, mortality and oviposition ofB. tabaciMEAM1 and their ability to interfere with the inoculation of ToCV in tomato plants. Our findings indicate that systemic insecticides cause high mortality when compared to untreated plants. Also, we found that flupyradifurone affects stylet activities ofB. tabaciand significantly reduce phloem ingestion, a behavior that is closely linked to the transmission of ToCV. Overall, our findings indicate that flupyradifurone may contribute to management of this pest and ToCV in tomato crops. Tomato chlorosis virus (ToCV) is a phloem-limited crinivirus transmitted by whiteflies and seriously affects tomato crops worldwide. As with most vector-borne viral diseases, no cure is available, and the virus is managed primarily by the control of the vector. This study determined the effects of the foliar spraying with the insecticides, acetamiprid, flupyradifurone and cyantraniliprole, on the feeding behavior, mortality, oviposition and transmission efficiency of ToCV byB. tabaciMEAM1 in tomato plants. To evaluate mortality, oviposition and ToCV transmission in greenhouse conditions, viruliferous whiteflies were released on insecticide-treated plants at different time points (3, 24 and 72 h; 7 and 14 days) after spraying. Insect mortality was higher on plants treated with insecticides; however, only cyantraniliprole and flupyradifurone differed from them in all time points. The electrical penetration graph (DC-EPG) technique was used to monitor stylet activities of viruliferousB. tabaciin tomato plants 72 h after insecticide application. Only flupyradifurone affected the stylet activities ofB. tabaci, reducing the number and duration of intracellular punctures (pd) and ingestion of phloem sap (E2), a behavior that possibly resulted in the lower percentage of ToCV transmission in this treatment (0-60%) in relation to the control treatment (60-90%) over the periods evaluated. Our results indicate that flupyradifurone may contribute to management of this pest and ToCV in tomato crops. (AU)

• Processo FAPESP: 18/18274-3 - Begomovirus e crinivirus em solanáceas: epidemiologia molecular regional e alternativas sustentáveis de manejo integrado
• Beneficiário: Jorge Alberto Marques Rezende
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 12/51771-4 - Begomovírus e Crinivirus em Solanaceas: epidemiologia molecular e estratégias
• Beneficiário: Jorge Alberto Marques Rezende
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 16/23463-4 - Efeito de diferentes inseticidas no comportamento alimentar de B. tabaci biótipo B (MEAM1) e na transmissão do crinivirus Tomato chlorosis virus (ToCV) em batata
• Beneficiário: Nathalie Kristine Prado Maluta
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado