Show recommend apple spray when pink buds appear summer spray for apples usually known as the cluster bud or pink spray Is most effective when applied as soon as the pink buds appear in the blossom clusters says L 0 williams extension horticulturist kansas state agricultural college the cluster bud bad spray consists of one and one half gallons of liquid time lime sulphur and one and one half pounds of arsenate of lead to each fifty gal ions of spray dry lime sulphur may inny be used instead of liquid material |