Published May 1957. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Published March 1978. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Published January 1964. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Published August 1994. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Published January 1963. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Published November 1964. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Published June 1959. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Why be concerned about pollination? While most varieties of pear will set some fruit without cross pollination, usually they will set more and better fruit with it. Cross pollination means the transfer of pollen from the anthers of flowers of one variety to the stigma of flowers of another.
Fruit set of sweet cherries was reduced if sprays containing fluoride (sodium or ammonium fluoride or hydrofluoric acid) were applied during anthesis. Sprays applied at other times during the fruit-growing season caused fruit and leaf symptoms, depending on the concentration of fluoride, but no reductions in fruit set. Symptoms of...