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Influence of method of application of paclobutrazol on soil residues and growth retardation in a ?Starkrimson-Delicious? apple orchard by Craighton S. Mauk; C. Richard Unrath; Sylvia M. Blankenship; Laura J. Lehman is a Agricultural and Biological Sciences article available to read on EtoBox.

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A 3-year field study was conducted to determine the influence of mode of application of the gibberellin-inhibitor paclobutrazol (PP333), [(2RS,3RS)-1-(4-chlorophenyl)-4,4dimethyl-2-(1,2,4 triazol-l-yl)pentan-3-ol], on PP333 soil residue levels and vegetative growth retardation of 10-year-old 'Starkrimson Delicious' (Malus Domestica Borkh .) spur-type apple trees . Treatments were applied in March, 1986 and consisted of foliar or soil sprays (200 ppm, 7 x applications at petal fall (+) 2, 4, 6, 8, 10 and 12 weeks) or a single soil drench (8 .2g A .I./tree) applied to the collar at petal fall . Foliar sprays were applied with and without a plastic ground cover to evaluate the influence of foliar runoff on the degree of soil absorption and its subsequent effect on vegetative growth . PP333 was extracted over a 3 year period (1986-88) from 400cm 2 soil patches located at the drip line of each tree, with the exception of soil drenches which were sampled near the collar . PP333 soil extracts were purified and quantitatively analyzed by HPLC . PP333 soil residue levels following foliar sprays were comparable to the soil spray treatment for each year and decreased at a rate of 50% per year

Who reads Influence of method of application of paclobutrazol on soil residues and growth retardation in a ?Starkrimson-Delicious? apple orchard?

Author

Craighton S. Mauk; C. Richard Unrath; Sylvia M. Blankenship; Laura J. Lehman

Publisher

Springer Netherlands; Springer-Verlag; Kluwer Academic Publishers; Springer Science and Business Media LLC (ISSN 0167-6903)

Published

1990

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)