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These two parts of a series deal with studies in an apple orchard in south-eastern England in 1953-59 on the effect of routine sprays of winter wash (...
Read morePart 1: The influence of routine sprays of winter wash (0.1 % DNOC+3.0% petroleum oil), lime-sulphur and captan on populations of P. ulmi and its pred...
Read moreThese two parts of a series deal with studies in an apple orchard in south-eastern England in 1953-59 on the effect of routine sprays of winter wash (...
Read more