1-Naphthaleneacetic acid and 6-benzyladenine thinning of a common slender spindle 'Jonagold'/M.9 apple orchard. II: Partial tree spraying

摘要: SummaryMature slender spindle ‘Jonagold’/M.9 apple (Malus × domestica Borkh.) trees were thinned using 10 mg l–1 1-naphthaleneacetic acid (NAA) or 100 l−1 6-benzyladenine (BA) and an axial fan sprayer at a spray volume of 1,500 l ha−1 applied to the whole canopy, with smaller volumes, where only upper half each canopy was sprayed. Partial applications NAA BA (at 1,000 ha−1, 750 500 ha−1) did not cause any reduction in final fruit numbers on half, lower tree. When tree sprayed run-off same thinning agent, successful both parts occurred. Good coverage (from 51% 77%) also observed leaves all positions measured, when ha−1.The development innovative crop load regulation strategy objective ISAFRUIT Smartfruit Project.