Pesticides: Dimethyl
Pesticide Classification
__ Herbicide _X Fungicide
__ Bactericide
__ Insecticide/Miticide
__ Molluscicide __ Repellent
Properties Properties Properties
__ Selective
__ Non-selective

__ Pre-emergent
__ Post-emergent

__ Systemic
__ Contact
_X Broad Spectrum
__ Specific

_X Systemic
__ Non-systemic

_X Protectant
__ Eradicant
__ Synthetic
__ Biological
__ Oil
__ Soap
__ Botanical
__ Other
__ Broad-spectrum
__ Specific

__ Systemic
__ Non-systemic

__ Contact poison
__ Stomach poison
__ Other

Common Brand Names:

Ferti-lome Halt Systemic
Scott’s Lawn Fungus Control

Chemical Action and Usages: Dimethyl (active ingredient thiophanate-methyl) is a systemic fungicide that is a replacement for Benomyl, a fungicide whose use was cancelled by the EPA. It has registered residential uses on lawns, ornamental trees, shrubs and flowers including roses. On lawns it controls anthracnose, dollar spot, brown patch, red thread, pink snow mold, summer patch, Fusarium blight and other diseases. Dimethyl controls powdery mildew, black spot, Botrytis flower blight and other diseases on annual and perennial flowers. In addition, on trees and shrubs some of the listed controls are for tip blight of pine, twig blight of juniper and leaf scab on crabapple, pear, pyracantha and others. This product is also used as a soil drench to control certain crown rots, stem rots and root rots and is sometimes used as a bulb treatment prior to storage.

Cautions/Instructions: Read the label carefully of the brand and formulation you have selected. Apply the product according to the directions on the label.

Toxicity: In humans, it may cause irritation of the eyes, nose and skin. Do not allow children to play on lawns sprayed with this product. Do not allow pets and livestock to graze on treated turf. Dimethyl is highly toxic to fish, so do not apply directly to water or where drift/runoff may get into ponds, lakes or streams.