The Economic Importance of the Clover Root Borer1

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Abstract:

Control of the clover root borer, Hylastinus obscurus (Marsh.), by single or multiple applications of insecticides, did not increase survival of red clover to an economically important level in seven field and insectary experiments conducted in New York during 1954 to 1957. Borer control appeared to have no effect whatever on first-cutting hay yields in the first harvest year and little, if any, on the second cutting. The severity of red clover root rot was correlated with the severity of borer injury, but the severity of root rot was not reduced as much, proportionately, by control of the borer, as was the severity of borer injury.

Document Type: Research Article

Publication date: August 1, 1961

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