Influence of Mineral Particle Films and Biomaterials on Guava Fruits and Implications for the Oviposition of <i>Anastrepha obliqua</i> (Macquart) (Diptera: Tephritidae)
Daniela Ribeiro da Costa,
Suzany Aguiar Leite,
Mateus Pereira dos Santos,
Beatriz Sousa Coelho,
Aldenise Alves Moreira,
Carlos Alberto Domingues da Silva,
Iara Sordi Joachim-Bravo,
Maria Aparecida Castellani
Affiliations
Daniela Ribeiro da Costa
Department of Crop Science and Animal Science, State University of Southwestern Bahia, Vitóriada Conquista 45083-300, Brazil
Suzany Aguiar Leite
Department of Crop Science and Animal Science, State University of Southwestern Bahia, Vitóriada Conquista 45083-300, Brazil
Mateus Pereira dos Santos
Department of Crop Science and Animal Science, State University of Southwestern Bahia, Vitóriada Conquista 45083-300, Brazil
Beatriz Sousa Coelho
Department of Crop Science and Animal Science, State University of Southwestern Bahia, Vitóriada Conquista 45083-300, Brazil
Aldenise Alves Moreira
Department of Crop Science and Animal Science, State University of Southwestern Bahia, Vitóriada Conquista 45083-300, Brazil
Carlos Alberto Domingues da Silva
Entomology Laboratory, Embrapa Cotton, Campina Grande 58428-095, Brazil
Iara Sordi Joachim-Bravo
Institute of Biology, Federal University of Bahia, Salvador 40107-115, Brazil
Maria Aparecida Castellani
Department of Crop Science and Animal Science, State University of Southwestern Bahia, Vitóriada Conquista 45083-300, Brazil
Anastrepha obliqua (Macquart, 1835) is an important pest of tropical fruits, especially Anacardiaceae and Myrtaceae, in the Americas. The objective of this study was to evaluate the influence of mineral films and biomaterials on the coloring of guava fruits (Psidium guajava L.) and implications for the oviposition of A. obliqua. Before the bioassays, color, firmness characteristics, total soluble solids, pH, and titratable acidity were determined to characterize the maturation stage of the fruits. Pieces of guava fruit covered in aluminum foil were immersed in suspensions of mineral particles (Surround® WP kaolin; kaolins 605, 607, 608, and 611; and talc) and biomaterials (chitosan, cassava and potato starch, and guar gum) and distilled water (control). After drying, the fruits were exposed to two A. obliqua pairs for 48 h in choice and non-choice tests, and the numbers of eggs per fruit were counted. Mineral films (Surround® WP kaolin, and kaolins 605, 607, 608, and 611) and biomaterials (cassava and potato starch) interfered with the color of guava (luminosity, chroma, and hue angle), inhibiting the oviposition of A. obliqua. Talc, chitosan, and guar gum did not influence the oviposition of A. obliqua in guava.
