Damage caused by Ephestia kuehniella (Lepidoptera: Pyralidae) and Sitotroga cerealella (Lepidoptera: Gelechiidae) to Brazil nuts
Keywords:
Amazon forest product, Lepidoptera, lesions, primary pestsAbstract
Ephestia kuehniella Zeller (Lepidoptera: Pyralidae) and Sitotroga cerealella Olivier (Lepidoptera: Gelechiidae) are considered important pests of stored products in Brazil. The purpose of this study was to determine if E. kuehniella and S. cerealella feed on Brazil nuts, and to identify the type of damage caused by these insects. The damage caused by these insects starts as a scratched surface that evolves into deep tunnels until a complete change in the shape of the nut occurs. Due to their ability to injure intact nuts, and their capacity to produce severe damage and economic losses, E. kuehniella and S. cerealella have the potential to be among the primary pests of stored Brazil nuts.
Sumário
Ephestia kuehniella Zeller (Lepidoptera: Pyralidae) e Sitotroga cerealella Olivier (Lepidoptera: Gelechiidae) são consideradas importantes pragas de produtos armazenados no Brasil. O objetivo foi verificar se E. kuehniella e S. cerealella se alimentam em castanha-do-brasil, e identificar os tipos de danos causados por esses insetos. As lesões produzidas por esses insetos se iniciam como raspados superficiais, o que evolui para galerias profundas até a completa alteração do formato da amêndoa. Devido a habilidade de danificar a amêndoa intacta e sua capacidade de promover consideráveis danos lesões com consequentes perdas no valor das castanhas, E. kuehniella e S. cerealella podem ser incluídas entre as pragas primárias da castanha-do-brazil stored.
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- Fig. 2. Damage caused by Sitotroga cerealella larvae (Lepidoptera: Gelechiidae) to Brazil nuts with 24 hours exposure (A) and detail of this damage (B), with seven (C) and 15 days (D). Nut covered in webbing from S. cerealella larvae after seven days of e
- Fig. 1. Injury in Brazil nuts by Ephestia kuehniella (Lepidoptera: Pyralidae) larvae with 24 hours exposure (A), seven days (B) and 30 days (C). Brazil nut browning made by E. kuehniella larvae detected on the seventh day of exposure (D and E).
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