A STUDY ON QUINCE RUST OF BLACK CHOKEBERRY (ARONIA MELANOCARPA) IN NEW JERSEY
Rutgers NJAES Cooperative Extension
Cape May Court House
Commercial Aronia acreage in the United States is increasing due to high antioxidant levels of the fruit and perceived low-maintenance of the plants based on its native origin. Jalma Farms noted a significant rust infection on their commercial Aronia plantings in New Jersey in 2012. There are no recommended control options available for rust on this minor crop. Consequently, in 2013 Rutgers University conducted a study to determine infection timing and fungicide treatment efficacy. Replicated treatments of JMS Stylet Oil and Rally 40WSP fungicide were applied at 14 day intervals between 11 Apr and 21 Jul. Foliar infection was evaluated on non-treated control bushes weekly. A destructive harvest and assessment of fruit disease was performed on 1 Aug. A final foliar assessment was conducted on 5 Aug for the foliar variables. The early and full season treatments of Rally 40WSP were most effective, lowering percent berry infection significantly relative to the control. There is no established economic threshold for this disease/crop, but the authors hypothesize that the disease pressure in 2013 was not high enough to warrant fungicide applications. The study will be continued in 2014 in order to substantiate results.
Poster has NOT been presented at any previous NACAA AM/PIC
This poster is being submitted for judging. It will be displayed at the AM/PIC if not selected as a State winner. The abstract will be published in the proceedings.
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Authors: Jenny Carleo, Lalancette Norman, George John
Carleo, J. Agricultural Agent, Rutgers NJAES Cooperative Extension, New Jersey, 08210
Norman, L. Extension Specialist in Tree Fruit Pathology, Rutgers NJAES Cooperative Extension, New Jersey, 08302
John, G. Farmer, Jalma Farms, New Jersey, 08230