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Pear pyrus communis l bartlett and danjou pear psylla pp psylla pyricola foerster pear prebloom applications of insegar for control of pear psylla 1990



Pear pyrus communis l bartlett and danjou pear psylla pp psylla pyricola foerster pear prebloom applications of insegar for control of pear psylla 1990



Insecticide and Acaricide Tests : 27-28




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