Insects have been in competition with man for the products of his labour ever since the cultivation of the soil began. But in course of time some kind of balance of power was established. Agricultural methods were gradually improved and if the whole historical process could have been followed by an ecologist he would probably have found that many of the cultural practices that farmers came to adopt by methods of observation, trial and error owed some part of their success to their swaying this balance of power against the more destructive insects.
KeywordsAdvisory Service Specialist Adviser Agricultural Research Council Agricultural Education Woolly Aphid
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