Monterey Florel Brand Growth Regulator Quart - Pack of 2 Sold in Pack of 2 This growth regulator stops the mess Prevents fruit formation on Apple, Buckeye, Carob, Crab apple, Elm, Flowering Pear, Horse chestnut, Maple, Oak, Olive, Sour Orange, Sweet Gum/Liquidambar, Sycamore and many more One application in the spring during full bloom, controls both leafy and dwarf mistletoe Also used on greenhouse ornamentals