Experimental Bin Drenching System for Testing Biocontrol Agents to Control Postharvest Decay of Apples

Plant Disease
W J JanisiewiczS S Miller

Abstract

A portable drencher capable of drenching a single bin of fruit was built to simulate the commercial application of chemicals to harvested apples in small orchard operations in the central and eastern United States. The drencher required as little as 125 liters of the treatment solution and permitted various bin travel speeds. Wounded apples were placed midway between the bottom and top of the bin, in the center, and near the four corners of the bin (20 fruit per location) and covered with enough unwounded apples to fill the bin. The bins were drenched with a suspension containing Penicillium expansum at 2 × 104 conidia per ml in 2000, 5 × 103 conidia per ml in 2001, and 3 × 103 conidia per ml in 2002 and 2003. In 2000 and 2003, the additional treatments included a combination of P. expansum with the yeast Metschnikowia pulcherrima at ~;1.2 × 107 CFU/ml, and in 2003 a combination with 2% sodium bicarbonate (SB) or a mixture of the yeast and SB. After 3 months of storage at ~;2°C, at all P. expansum conidial concentrations, more than 90% of wounded fruit developed decay on 'Golden Delicious', 'Delicious', and 'Rome' apples in the 2000-02 experiments. In 2003, 66 and 33.1% of the wounded fruit developed decay on 'Delicious' and 'G...Continue Reading

References

Jul 31, 2002·Annual Review of Phytopathology·Wojciech J Janisiewicz, Lise Korsten
Oct 24, 2008·Phytopathology·W J JanisiewiczC P Kurtzman
Jan 1, 1994·Annual Review of Phytopathology·M L Gullino, L A Kuijpers

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Citations

Feb 8, 2019·Journal of Epidemiology and Community Health·Elaine KilabukGonzalo G Alvarez

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