Efficacy of natural herbicides on dandelion (Taraxacum officinale G.H. Weber ex Wiggers) and white clover (Trifolium repens L.) populations

Perennial broadleaves such as dandelion (Taraxacum officinale G.H. Weber ex Wiggers) and white clover (Trifolium repens L.) are known to be pervasive weeds in stands of maintained turfgrasses. The use synthetic herbicides is the most common effective method control for these weeds. As pesticide European countries, Canada, United States becoming more scrutinized, identification alternative weed options may necessary. However, few organic or natural products exist. A field study was conducted evaluate efficacy various fertilizers bio-herbicides including chelated iron, ammonium nanonate, citrus oil, acetic acid, sodium chloride on compared that two containing 2,4-dichlorophenoxy-acetic acid (2,4-D), mecoprop-p (MCPP), dicamba. Injury perennial ryegrass (Lolium perenne also evaluated with objective determining which effectively suppressed populations while imposing minimal injury desirable Chelated iron controlling equal both turfgrass. Other bio-herbicide treatments provided some but generally were too injurious Fertility oil did not reduce either weed. This research indicates currently market serve alternatives herbicides. information will beneficial homeowners turfgrass managers geographic areas restricted where desired.