Abstract
ABSTRACT: The present study aimed to evaluate the developmental phases of feijoa fruits associated with infestation by Anastrepha fraterculus (Wiedemann) (Diptera: Tephritidae) and the nonpreference of fruit flies for ripe fruits of feijoa. Two tests were carried out. In the first trial, we evaluated the association between the developmental stages of feijoa fruits and infestation by A. fraterculus. To accomplish this, fruits at five different stages of development, from green to ripe, were examined from the Alcântara cultivar. In the second trial, we evaluated the nonpreference of A. fraterculus for ripe fruits of Alcântara, Helena, Mattos and access 2316 cultivars. Physicochemical analyses were performed on the fruits of both trials. In the second test, analyses of polyphenol index and tannin concentration were also performed. Feijoa fruits in stage I are the likely targets of attack by A. fraterculus. The fruits of Alcântara cultivar from stage II, with 39 mm of transversal diameter and soluble solids, presented four puparium / fruit. The fruits of Alcântara and access 2316 cultivars showed greater and lesser infestation, respectively. The fruits of access 2316 also showed a higher concentration of tannins compared to the three commercial cultivars tested, which may have conferred the greatest protection against infestation by A. fraterculus. Feijoa fruits from Alcântara and Mattos cultivars showed high susceptibility to infestation by A. fraterculus, requiring management practices to guarantee commercial production.
Highlights
Brazil has a large number of neglected or underused native fruit species with the potential for production and fresh consumption, or for processed products, either of which could be a source of income for local small farmers (LEITE & CORADIN, 2011)
It was verified that fruit fly infestation started at stage II when fruits measured in average 3.6 x 3.9 cm in longitudinal and transversal diameter, respectively
In the fruit ripening process, reduction occurs in weight, titratable acidity, and total soluble solids (KLEIN & THORP, 1987)
Summary
Brazil has a large number of neglected or underused native fruit species with the potential for production and fresh consumption, or for processed products, either of which could be a source of income for local small farmers (LEITE & CORADIN, 2011). Fruits of native species may represent an opportunity for small farmers to gain additional income from niche markets. Berg), synonymous Feijoa sellowiana], is considered a potential fruit species for commercial development (DUCROQUET et al, 2000; SÁNCHEZ-MORA et al, 2019). Feijoa is a species endemic to southern Brazil and Uruguay and appreciated worldwide for the unique taste and aroma of its fruits (SANCHEZMORA et al, 2019). Outside of its center of origin, Approved 08.20.21 Returned CR-2021-0353.R1 by the author
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