Author:
Børve Jorunn,Vangdal Eivind,Stensvand Arne
Abstract
AbstractThe combination of preharvest treatments with calcium chloride and fungicides, and storage of maturity graded fruit were assessed in five European plum cultivars. At harvest, samples of fruit within a commercially suitable range in ripening were divided into two categories: less-ripe (tree ripe-) and more-ripe (tree ripe+). The fruit were stored for 10–14 days at 4 °C followed by 2–3 days at 20 °C before the assessment of fungal decay. If calcium chloride was applied six times each season, postharvest fruit decay was significantly reduced in four of nine experiments, with a total mean reduction of around 50%. Two calcium applications in combination with a fungicide treatment reduced decay by approx. 60% compared to the untreated in one experiment. In six of seven experiments there was no effect of preharvest fungicide applications. In six of 10 experiments, fruit of the category tree ripe- had fewer fruit with fungal decay after storage than the tree ripe+fruit. The higher incidence in the category tree ripe+fruit was primarily due to brown rot, Mucor rot, and blue mould. For the category tree ripe+, there was two to ten times more decay than on tree ripe- fruit after a simulated shelf-life period. To ensure low incidence of fungal decay, fruit of commercial harvest maturity may thus be separated in two ripening categories, one for rapid distribution to the market (tree ripe+) and another for extended distribution time (tree ripe-).
Funder
Norwegian Institute of Bioeconomy Research
Publisher
Springer Science and Business Media LLC
Subject
Horticulture,Plant Science,Agronomy and Crop Science
Reference31 articles.
1. Alkam, N., & Fortes, A. M. (2015). Insight into molecular and metabolic events associated with fruit response to post-harvest fungal pathogens. Frontiers in Plant Science, 6, 889. https://doi.org/10.3389/fpls.2015.00889
2. Biggs, A. R. (1999). Effects of calcium salts on apple bitter rot caused by two Colletotrichum species. Plant Disease, 83, 1001–1005.
3. Biggs, A. R., El-Kholi, M. M., El-Neshawy, S., & Nickerson, R. (1997). Effects of calcium salts on growth, polygalacturonase activity, and infection of peach fruit by Monilinia fructicola. Plant Disease, 81, 399–403.
4. Borecka, H., Bryk, H., & Piotrowski, S. (1991). The effect of Rovral (iprodion) treatment on the control of some plum storage diseases. Phytopathologica Polonica, 2 (XIV), 5–10.
5. Børve, J., & Vangdal, E. (2007). Fungal pathogens causing fruit decay on plum (Prunus domestica L.) in Norway. Acta Horticulturae, 734, 367–369.