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Start Over You searched for: Author(s) McDonald, Mary Ruth Remove constraint Author(s): McDonald, Mary Ruth Subject(s) Agricultural Sciences Remove constraint Subject(s): Agricultural Sciences Collection Evaluation of insecticides for control of onion maggot in yellow cooking onions [Canada] 2011: Onion cultivar trial. Remove constraint Collection: Evaluation of insecticides for control of onion maggot in yellow cooking onions [Canada] 2011: Onion cultivar trial.

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