Factors affecting the numbers of aphids on grain crops in Manitoba with observations on aphid predators and parasites
Various biotic and abiotic factors prevented aphids on grain crops from reaching their potential on fields under observation in Manitoba in 1968 and 1969. These included wind, rain, predators, parasites and fungus disease. In some cases wind or rain or a combination of wind and rain with other facto...
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2012
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| Online Access: | http://hdl.handle.net/1993/5829 |