6-benzyladenine + gibberellins A4A7 (Promalin, Typy, Perlan, RiteSize)

6-benzyladenine + gibberellins A₄A₇ is a mixture of two plant growth regulators--a cytokinin and a gibberellin--and has two uses in tree fruit production. On bearing apple trees, foliar applications increase the length-to-diameter ratio of fruit, producing more elongated fruit at harvest. The spray is more effective when daytime high temperatures reach or exceed 70°F. Mild thinning may occur with later applications.

The material also can be used to increase branch angles and the number of lateral branches on apple, pear, and cherry trees. On apples, it may be applied as a directed foliar spray or in a latex paint mix on young bearing or nonbearing trees, either in the nursery or the orchard. On pears, it may be applied only as a foliar spray on young nonbearing trees, either in the nursery or the orchard. On sweet cherries, it may be applied as a foliar spray only to nonbearing trees in the nursery, or in a latex paint mix to nonbearing trees in the orchard.