Evaluation of diferent application volumes on the control of Tuta absoluta (Meirick, 1917) (Lepidoptera: Gelechiidae) in tomato crop - DOI: 10.4025/actasciagron.v30i5.5961

• Autor(a) principal: Iost, Cristina
• Data de Publicação: 2008
• Outros Autores: Ferreira, Marcelo da Costa, Martinelli, Nilza Maria, Maccagnan, Douglas Henrique Bottura
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Acta Scientiarum. Agronomy (Online)
• Texto Completo: http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/5961
• topic: chlorfluazuron; evaluation; spray technology; chlorfluazuron; amostragem; tecnologia de aplicação

The aim of this work was to evaluate the control of Tuta absoluta with different application volumes in field tomato. The evaluation of pest level infestation was performed recording the number of pinworms, lesions with or without live pinworms, and the number of eggs on tomato leaves and fruits. The treatments were: TJ6011002 (200 L ha-1), TJ6011004 (600 L ha-1), TX04VK (200 L ha-1), TX12VK (600 L ha-1) and a knapsack sprayer (100 L ha-1); they were all applied with and without adjuvant. A pest check without application was included. Chlorfluazuron was used at the dosage of 100 mL 100 L-1. No significative differences were observed among treatments with or without adjuvant and the check. However, significant differences were observed between nozzles. The lowest lesion incidence was observed in the treatment with nozzle TJ6011004 (600 L ha-1) and significant differences with or without adjuvant were observed with nozzle TJ6011002 (200 L ha-1). This study demonstrated the importance of monitoring in pest control.