Study of on-tree nondestructive judgement of internal disorders and maturation of peach fruit by an acoustic vibration method

2022 Fiscal Year Final Research Report

• Project/Area Number: 19K06018
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 39030:Horticultural science-related
• Research Institution: Okayama University
• Principal Investigator: Fukuda Fumio 岡山大学, 環境生命科学学域, 准教授 (60294443)
• Co-Investigator(Kenkyū-buntansha): 河井 崇 岡山大学, 環境生命科学学域, 助教 (90721134)
• Project Period (FY): 2019-04-01 – 2023-03-31
• Keywords: 音響振動法 / 内部生理障害 / 一点式音響振動装置 / モモ / 核割れ / 水浸状果肉褐変症

Outline of Final Research Achievements

Detection of internal fruit physiological disorders, "split-pit" and "water soaked brown flesh"(WSBF) was investigated using an acoustic vibration method with the sensor touched to fruit at one point. Almost of Split-pit fruit could be detected in the beginning of July and thinning of the fruit assumed as split-pit one decresed mixing of split-pit fruit less than 10%. Because WSBF fruit had abnormal softer flesh, their resonant frequency was significantly lower compared with normal fruit. Using this method, maturity levels in each fruit could be judged over the fruit bag, The range of resonant frequency that the mixing of WSBF fruit did not occur could be set. Based on these results, production of high quality peach fruit without internal physiological disorder was achieved by utilyzation of an acoustic vibration methods.

Free Research Field

果樹園芸学

Academic Significance and Societal Importance of the Research Achievements

外観からわかりづらい内部障害の発生を、簡便に樹上で理解できる手法が明らかになったことは、内部障害の発生様相や障害果の発生軽減につながる知見を得る上で重要なツールになると考えられ、学術的意義を有すると考える。
また、本成果は、直ちに、モモ栽培においても、生理障害果の混入を抑制する実用性を有していて、この間、栽培に用いることができる音響振動装置も開発されてきたことから、社会的意義も大きいと考えている。