Herbicide Damage: 2,4-D and triclopyr categories: Common Problems Herbicide Damage last review date: 2026-05-18 10:21 2,4-D herbicide damage on tomato Photo 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 […]
Herbicide Damage: Dicamba categories: Common Problems Herbicide Damage last review date: 2026-05-19 09:55 Twisting and distortion of deodar cedar needles from dicamba Photo by: R. Maleike Biology Dicamba is a hormone-type herbicide that mimics natural growth regulator produced in plants. It is used for control of broadleaf weeds and is readily absorbed by roots and […]
Herbicide Damage: Dichlobenil (Casoron) categories: Common Problems Herbicide Damage last review date: 2026-05-19 08:44 Casoron damage causing needle tip chlorosis on pine Photo 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 […]
Herbicide Damage: Fluazifop categories: Common Problems Herbicide Damage last review date: 2026-05-19 09:01 Necrosis on juniper foliage from fluazifop Photo 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 […]
Herbicide Damage: Glyphosate and sulfonylureas categories: Common Problems Herbicide Damage last review date: 2026-05-19 10:52 Glyphosate damage causing yellowing of raspberry leaves Photo 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. […]
Herbicide Damage: Horticultural spray oil categories: Common Problems Herbicide Damage last review date: 2026-05-20 01:09 Needle browning and loss on spruce from horticultural oil damage Photo 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 […]
Herbicide Damage: Long-term residual herbicides categories: Common Problems Herbicide Damage last review date: 2026-05-20 02:01 Spiral foliar damage from long-term residual herbicide Photo 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 […]
Herbicide Damage: Triazines (atrazine, simazine and others) categories: Common Problems Herbicide Damage last review date: 2026-05-20 02:35 Simazine damage on Japanese cherry Photo 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 […]