Determinação do nível de controle econômico de Enneothrips flavens Moulton, 1941 (Thysanoptera: Thripidae) em cultivar de amendoim de porte ereto

• Autor(a) principal: Calore, R.a. [UNESP]
• Data de Publicação: 2012
• Outros Autores: Boiça Júnior, A.l. [UNESP], Chagas Filho, N.r., Souza, J.r. De [UNESP]
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1590/S1808-16572012000200015; http://hdl.handle.net/11449/114523
• topic: Tripes; Arachis hypogaea L.; manejo integrado de pragas; Thrips; Arachis hypogaea L.; integrated pest management

The present work was aimed to evaluate different economic control levels of Enneothrips flavens in upright peanut plants, during the dry and wet seasons. The experiments were carried out at the Departamento de Fitossanidade, FCAV/UNESP - Jaboticabal, SP, Brazil, in 2007/2008. To evaluate the different E. flavens infestation levels, samplings were carried out at 17 days after plant emergence (DAE), collecting 10 closed leaflets per parcel. Peeled grain production (kg ha-1), and 100-seed dry mass (g) were also determined. Once the production and thiamethoxam + lambda-cyhalothrin spraying times were determined, the production gain (25 kg bags and kg.ha-1) and net profit variation were obtained. It was concluded that the peanut plants were more infested from 17 to 30 DAE and from 47 to 74 DAE for the dry cultivation and 32 to 53 DAE for the wet cultivation; the total-control treatment presented higher production and net profit variation as compared to the control plot with 26.43 bags.ha-1 and R$ 585.66 for the planting season held in drought, and 53.88 bags.ha-1 and R$ 1,354.26 for the planting done during the wet time; E. flavens control with 20% of leaflets attacked in both seasons was the closest to total control in the production (bags.ha-1) and net profit variation; the insecticide thiamethoxam + lambda-cyhalothrin was effective to control the pest, resulting in increased the peanut production in both cultivation seasons.