Herbicide injuries usually appear within days after exposure, but symptoms may develop several weeks after exposure. Injuries may occur considerably later if tree roots grow into sites that were treated with a soil sterilant within the last two years. This might also be a problem if herbicide-contaminated soil is brought into a landscape
Fall Weed Control in Tree Fruit Crops — Plant & Pest Advisory
Nov 9, 2021 · Fall applications are more effective and reduce the risk of herbicide drift injury to adjacent crops. Weeds are most susceptible to 2,4-D when they are growing vigorously, not under stress, and before flower buds appear.
Herbicide Injury to Garden Plants - Yard and Garden
Herbicide damage has a wide range of symptoms. Symptoms include leaf cupping, petiole twisting, epinasty, blotches, change of color, severe tissue distortion/deformation (especially on new growth), low vigor, and/or plant death.
Weed management in fruit trees starts with fall herbicide application
Oct 23, 2024 · Fall herbicide application should be made after fruit trees are dormant. Under those conditions, there is little chance for crop injury, so herbicides can be sprayed against the trunk and stems of the crop and into the center of bushes. This allows for coverage of 100% of the area in the tree line.
Home Yard & Garden Newsletter at the University of Illinois
Jun 17, 2021 · Herbicide injury on pear. Michelle Wiesbrook, University of Illinois. Herbicide injury to off-target plants (more specifically drift injury) is as old as herbicides themselves, but it has become a more common occurrence in recent years.
Fruit and Leaf Injury | WSU Production Guide - Washington State …
The following is a list of some common pesticides, nutrients and surfactants, and the injury observed following their use (See also herbicides in Chemical Weed Control): Ammonium thiosulfate (ATS)—This product can damage flower and leaf tissue when applied during bloom.
Many soil-applied herbicides are absorbed through plant shoots while they are still underground and may kill or injure the shoots before they emerge from the soil. Volatile herbicides such as the thiocarbamates (e.g., EPTC [Eradicane]) and the dinitroanilines (e.g., trifl uralin [Trefl an]) can penetrate the shoot as gases.
Diagnosing Herbicide Injury is Easy… Sometimes.
May 26, 2023 · The pattern of crop injury is an excellent indicator of if herbicides are at fault and their source. Injury that matches the width of a spray boom suggests a potential herbicide misapplication. Strips of injury or injury at field edges can indicate overlapping herbicide applications, resulting in an excessive application rate.
Special Weed Problems / Pear / Agriculture: Pest Management …
Soil-residual herbicides such as simazine and rimsulfuron can provide good control before the plants emerge. Paraquat and glyphosate can both control susceptible populations of hairy fleabane when plants are small (before sending up flowering stalks); however, California has many populations resistant to one or both of these herbicides.
Herbicide Treatment Table / Pear / Agriculture: Pest Management ...
If no rainfall occurs within 4 weeks, incorporate with sprinkler or flood irrigation. Remove existing weeds with cultivation or a postemergence herbicide, because it has no postemergence activity. Avoid higher rates on sandy or gravelly soils to prevent injury to trees.