Herbicide Damage: 2,4-D and triclopyr categories: Common Problems Herbicide Damage revision date: 2023-01-09 12:00 2,4-D herbicide damage on tomatoPhoto by: R.S. Byther Biology 2,4-D and triclopyr are hormone-type herbicides used to control annual and perennial broadleaf weeds. These products are translocated throughout the plant in both xylem and phloem. They mimic natural hormones in plants […]
Herbicide Damage: Dicamba categories: Common Problems Herbicide Damage revision date: 2022-11-03 09:37 Twisting and distortion of deodar cedar needles from dicambaPhoto by: R. Maleike Biology Dicamba is a hormone-type herbicide that mimics natural growth regulators produced in plants. It is used for control of broadleaf weeds and is readily absorbed by roots and foliage and […]
Herbicide Damage: Dichlobenil (Casoron) categories: Common Problems Herbicide Damage revision date: 2022-11-02 10:36 Casoron damage causing needle tip chlorosis on pinePhoto by: R. Maleike Biology Dichlobenil is a soil-applied herbicide which inhibits root development and prevents germination and establishment of weed seedlings. While dichlobenil is not translocated in the plant, symptoms resulting from inhibited root […]
Herbicide Damage: Fluazifop categories: Common Problems Herbicide Damage revision date: 2022-11-02 10:23 Necrosis on juniper foliage from fluazifopPhoto by: R. Maleike Biology Fluazifop (fluazifop-p-butyl) is an herbicide used for control of annual and perennial grasses (except for annual bluegrass and fine fescues). It interferes with lipid (fatty acid) synthesis. This herbicide is taken into the […]
Herbicide Damage: Glyphosate and sulfonylureas categories: Common Problems Herbicide Damage revision date: 2022-11-02 09:58 Glyphosate damage causing yellowing of raspberry leavesPhoto by: R.S. Byther Biology Glyphosate is a nonselective herbicide (affects both grasses and broadleaf plants) which interferes with amino acid synthesis. It is translocated throughout the plant via both xylem and phloem. Damage is […]
Herbicide Damage: Horticultural spray oil categories: Common Problems Herbicide Damage revision date: 2022-11-02 09:51 Needle browning and loss on spruce from horticultural oil damagePhoto by: R. Maleike Biology Horticultural spray oils may be applied to plants for control of various diseases, insects and mites. However, if oils are applied when temperatures are below 50 degrees […]
Herbicide Damage: Long-term residual herbicides categories: Common Problems Herbicide Damage revision date: 2022-11-02 09:45 Spiral foliar damage from long-term residual herbicidePhoto by: R. Maleike Biology Uracils, substituted ureas and other long-term residual herbicides are used to obtain total vegetation control usually for long periods of time. These products are persistent in the soil for one […]
Herbicide Damage: Triazines (atrazine, simazine and others) categories: Common Problems Herbicide Damage revision date: 2022-11-02 09:41 Simazine damage on Japanese cherryPhoto by: R.S. Byther Biology Triazines are nonselective herbicides that are used for control of annual and perennial grasses and broadleaf weeds. These products are translocated in plants in the xylem. Older leaves show the […]