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Ethephon 2SL Plant Growth Regulator

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Ethephon 2SL Plant Growth Regulator by Quali-Pro is designed for the removal of dwarf and leafy mistletoe in ornamental conifers and ornamental deciduous trees. Ethephon can also be used to eliminate undesirable fruit on apple, crabapple, carob, and olive trees as well as slowing the growth of turfgrasses.

Target Pests

Ethephon 2SL is used as a plant growth regulator to slow turfgrass growth eliminate undesirable fruits on trees and dwarf and leafy mistletoe.

For Use In

Ethephon 2SL is for use on ornamental conifers ornamental deciduous trees apple trees crabapple trees carob trees olive trees and specific turfgrasses.


For dwarf mistletoe on ornamental conifers mix Ethephon 2SL at the rate of 2 pints per 20 gallons of water and for treatment of douglas firs apply at a rate of 1 pint per 20 gallons of water. For leafy mistletoe on deciduous trees mix Ethephon 2SL at a rate of 2 quarts per 20 gallons ensuring to apply with uniform coverage. For undesirable fruit elimination on apple and crabapple apply Ethephon 2SL at a rate of 8 to 12 ounces per 20 gallons of water. For carob trees use at a rate of 6 ounces per 20 gallons of water. For olive trees apply at a rate of 12 ounces per 20 gallons of water. For slowing turf growth see label above for specific grass and mix rates and application timing.

Coverage Area

Coverage rates of Ethephon 2 SL varies drastically depending on application process chosen and specific tree or grass targeted.

Time to Kill

Ethephon 2SL is a plant growth inhibitor and can take several weeks to see results for fruit bearing trees may take a couple harvest seasons to stop producing completely.

Mix Rate

1 pint to 20 gallons of water

Active Ingredient

Ethephon 21.7%

Ethephon 2SL Plant Growth Regulator

Product Q & A

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Browse 3 questions Browse 3 questions and 3 answers
So for dwarf mistletoe removal in ornamental conifers, can i spray the whole tree, or must i spray only the mistletoe plant?
Jim E on Nov 11, 2017
BEST ANSWER: Ethephon (2-chloroethanephosphonic acid) is a growth regulating chemical that can be used to remove mistletoe shoots and reduce seed production. Ethephon is usually only used in high value areas where young trees should be protected until infected overstory trees are removed. This treatment does not kill the entire mistletoe plant, just the shoot. Retreatment is necessary until infected trees are removed, mistletoe infections are pruned from the tree, or new non-host trees are planted.

Apply as a foliar spray to dwarf mistletoe shoots
before mistletoe seed dispersal. If mistletoe
regrowth occurs, re-treat before seed dispersal.
For effective removal, all mistletoe shoots must be
sprayed to wet.
Use of a non-ionic surfactant at recommended
rates may increase effectiveness.
so, will this product not work on mature cedar elm trees with significant mistle toe growth?
a shopper on Feb 23, 2018
BEST ANSWER: Yes, Ethephon 2SL will work to control mistletoe in cedar elm trees.
For the removal of Dwarf Mistletoe in Ornamental
Conifers and Leafy Mistletoe in Ornamental
Deciduous Trees; for the elimination of undesirable
fruit on Apple, Crabapple, Carob, and Olive
trees; and for retarding the growth of Turfgrasses.
Will it harm dogs?
canvall12@gmail.com C on Sep 11, 2018

Corrosive: Causes irreversible eye damage. Wear safety goggles
when handling. Harmful if swallowed or absorbed through skin. Do
not get in eyes or on clothing. Avoid contact with skin. Do not inhale
vapors, as this product will irritate mucous membranes.

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