Year: 1992
Type: article
Abstract: A factorial arrangement of four replications of ethephon (0, 25, 50, 100, or 150 mg·liter -1 ) and GA 3 (0, 25, or 50 mg·liter -1 ) treatments in a Randomized Complete Block Design were applied to `Redhaven' peach trees in mid-September. Each tree received the same treatment in 1987-1990. Development of flower buds (after endodormancy completion) was significantly delayed by GA 3 and ethephon. The date of 50% bloom was significantly delayed by GA 3 (approximately 1 day) and by ethephon (4.7 days with 150 mg·liter -1 treatment). Increasing the concentration of each chemical resulted in more delay of bloom. There was no interaction of the effects of the two chemicals on bloom date. Application of 50 mg·liter -1 GA 3 plus 150 mg·liter -1 ethephon caused the greatest bloom delay (6.5 days compared to untreated trees). Gummosis on scaffolds was evident in the fall and following spring on trees treated with the 2 highest rates of ethephon. During the summer and following fall, little gummosis was evident. By September 1991, evidence of gummosis was insignificant and no tree mortality occurred.
Source: HortScience
Authors: D.E. Deyton, D.W. Lockwood, S. Ventataraman
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: bronze
OpenAlex ID: W2585924627