| Like most homeowners, you probably use weedkiller | | | | plant? 30 feet is the recommended distance. |
| around the house. Be very careful where you spray it, | | | | Glyphosate products should be used as a last resort |
| and how much you use. | | | | for combating weeds. Pre-emergent herbicides are a |
| Heidi Kratsch, a Utah State University Extension | | | | better alternative, but need to be used prior to a weed |
| ornamental horticulture specialist, says that applied | | | | seeds germination. According to Kratsch and Salt |
| incorrectly or in too high of a dose, glyphosate | | | | Lake County Extension horticulturist, Maggie Shao, the |
| products like Roundup can cause a condition called split | | | | following woody plants are most susceptible to |
| bark in woody ornamentals and other woody plants. | | | | glyphosate: |
| When sprayed too close to non targeted plants, the | | | | * Pyrus species (especially Callery Pear) |
| tree or woody plant absorbs the chemical through it's | | | | * Prunus species (especially Yoshino Cherry and |
| roots, the chemical breaks down the bark structure | | | | Kwanzan Cherry) |
| and destroys the winter hardiness of the plant. This | | | | * Red Maple |
| causes freeze/thaw damage, which in turn can cause | | | | * Norway Maple (especially 'Emerald Queen') |
| sunscald. The cosmetic damage is bad enough, but for | | | | * Japanese Maple (especially var. dissectum) |
| nursery owners, this makes the plant unsalable. | | | | * Paperbark Maple |
| The news is not all bad. It is not the glyphosate itself | | | | * Mountain-Ash |
| that causes the damage, but the surfactant, or wetting | | | | * Serviceberry |
| agent, in some products. The surfactant helps spread | | | | * Sycamore |
| the chemical and help the chemical cling to the | | | | * Crabapple |
| targeted plants leaves so the glyphosate can be | | | | * Dogwood (especially Kousa dogwood) |
| absorbed. Read the label when you purchase a weed | | | | * Hawthorn |
| killing product. On the label, look for the words | | | | * Magnolia (especially 'Butterflies,' 'Elizabeth,' 'Sawada's |
| "adjuvant load", this is the surfactant. The following | | | | Cream,' 'Yellow Bird' and 'Yellow Lantern') |
| products do not contain a surfactant: Campaign, Fallow | | | | All herbicides have risks, but used correctly, can be a |
| Star, Glypro, Landmaster BW, Rodeo and Roundup | | | | great tool in a gardener's arsenal to control those |
| Custom,however, proper use is still needed. What is a | | | | nasty weeds. |
| safe distance to spray glyphosate from a woody | | | | |