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K.R. Sanderson and R.D. Peters
In 2006 at the Harrington Research Farm in PEI, a prototype carrot foliage trimmer (CFT) was designed and manufactured. The CFT mows the lateral foliage of adjacent carrot rows which opens the carrot canopy to allow sunlight to penetrate, foliage to dry and also removes older senescing foliage, thus eliminating conditions conducive to SRC development.
Field evaluation has shown that trimming has no effect on carrot yield or quality.
In 2006, trimming at row closure significantly reduced the incidence of SRC on foliage by 82% and in carrot roots in storage by 75%, compared to the untrimmed control plots.
In 2007, two nine-row commercial units were built by the carrot industry in North America, one in Nova Scotia, Canada and one in Wisconsin, USA. In the Annapolis Valley, Nova Scotia, commercial trimming in 2007 reduced the number of diseased petioles in selected grower fields by 72%, 54% and 37% for the varieties Sugarsnax, Topcut and Uppercut, respectively.
Mechanical canopy trimming is rapidly becoming an effective tool in
the management of carrot disease.
© 2012, Organic Agriculture Centre of Canada (OACC)