Effects of Post-Harvest Sprays of 2,4,5-Trichlorophenoxypro-Pionic Acid on Fruitfulness of ‘Magness’ Pears

Abstract

Several small blocks of 'Magness' pears were planted in Maryland orchards shortly after its introduction by the U. S. Department of Agriculture in 1960. One of these blocks began bearing at 7 or 8 years of age, with production increasing each year thereafter, while 4 others of the same age have never produced a full crop, and often little or nothing at all. This cultivar is very resistant to fireblight, Erwinia amylovora, and the fruit is of such high quality that roadside marketers cannot supply the demand. Limited production to date has made these plantings unprofitable, yet growers are reluctant to remove them in hope that they eventually will begin regular production. Further plantings would be made if a way could be found to improve fruitfulness of this high quality pear.