Seasonal abundance, damage assessment and economic threshold of the pea aphid, Acyrthosiphon pisum (Harris), on field peas in Manitoba

Maiteki, George Alfred2014-11-242014-11-241985http://hdl.handle.net/1993/28794xiv, 151 [i.e. 165] leaves :engSeasonal abundance, damage assessment and economic threshold of the pea aphid, Acyrthosiphon pisum (Harris), on field peas in Manitobadoctoral thesis