Assessment of SPLAT formulations to control Grapholita molesta (Lepidoptera: Tortricidae) in a Brazilian apple orchard

Chilean Journal of Agricultural Research. 2014;74(2):184-190 DOI 10.4067/S0718-58392014000200009

 

Journal Homepage

Journal Title: Chilean Journal of Agricultural Research

ISSN: 0718-5839 (Online)

Publisher: Instituto de Investigaciones Agropecuarias, INIA

LCC Subject Category: Agriculture | Geography. Anthropology. Recreation: Environmental sciences

Country of publisher: Chile

Language of fulltext: English

Full-text formats available: PDF

 

AUTHORS


Cristiano João Arioli (Empresa de Pesquisa Agropecuária e Extensão Rural do Estado de Santa Catarina)

Patrik Luiz Pastori (Universidade Federal do Ceará)

Marcos Botton (Empresa Brasileira de Pesquisa Agropecuária Embrapa)

Mauro Silveira Garcia (Universidade Federal de Pelotas)

Rafael Borges (ISCA Technologies)

Agenor Mafra-Neto (ISCA Technologies)

EDITORIAL INFORMATION

Double blind peer review

Editorial Board

Instructions for authors

Time From Submission to Publication: 30 weeks

 

Abstract | Full Text

Mating disruption is a technique that uses synthetic copies of sex pheromones to control insect pests. We aimed to control Oriental fruit moth (OFM) Grapholita molesta (Busck) (Lepidoptera: Tortricidae) with formulations of SPLAT Grafo (SG) and SPLAT Grafo Attract and Kill (SGAK) in small (1 ha) apple (Malus domestica Borkh.) orchards. Our experiment was conducted in a commercial orchard with 'Gala' trees (spacing 1.5 x 4.5 m) in Vacaria, Rio Grande do Sul State, Brazil. We evaluated the effect of four treatments on G. molesta population densities: a) SG at 1 kg ha-1 (300 point sources of 3.3 g each), b) SGAK at 1 kg ha-1 (1000 point sources of 1 g each), c) insecticides as recommended by Integrated Apple Production (IAP), and d) untreated control (no treatment). Specialized Pheromone and Lure Application Technology (SPLAT) treatments were applied on 1 August 2004 and reapplied after 120 d (1 December 2004). The treatment effect was evaluated by weekly counts of males captured in Delta traps baited with commercial synthetic sex pheromone lures (eight traps per treatment). We assessed fruit damage caused by G. molesta in eight replicates of 200 fruits each on 26 October, 30 November 2004, and 5 and 31 January 2005. Applying 1 kg ha-1 of SG and SGAK in August and December 2004 significantly reduced the number of male moths caught in Delta traps. Damage to fruits at harvest, however, did not differ significantly from the control. This indicates a decline in the efficacy of mating disruption when SG and SGAK are used to protect small areas (1 ha) under high Oriental fruit moth pressure.