Aqueous sprays of NH4F applied to ‘Early Improved Elberta’ peach trees significantly increased the % of abnormal fruits. Tissue firmness was increased on the dorsal side but decreased on the suture side. Suture tissues contained more F than dorsal tissues and both had higher F levels as the F spray concn increased. The climacteric of treated fruits was initiated before the untreated fruits at every sampling date where a climacteric occurred. Both malic and citric acids were decreased in the suture tissues of F treated fruits.
Received for publication June 5, 1972. Technical Paper No. 3 370. Oregon Agricultural Experiment Station.
This research was supported in part by Contract No. CPA 70-130 from the Division of Ecological Effects Research of the Environmental Protection Agency.