other name: (E,Z)-4-[3-(4-chlorophenyl)-3-(3,4-dimethoxyphenyl)-1-oxo-2-propenyl]morpholine
CAS No.: [110488-70-5]
Molecular Formula: C21H22ClNO4
Dimethomorph, a cinnamic acid derivative, is a member of the morpholine group of fungicides and consists of a mixture of the E and Z isomers in approximately equal proportions. Its mode of action is through the disruption of fungal cell wall formation. When applied as a foliar spray, dimethomorph penetrates the leaf surface and is translocated within the leaf to provide protectant action against plant pathogenic Phytophthora species and a number of downy mildew diseases of fruit, vegetables and potatoes.
Biochemistry Inhibits the formation of the oomycete fungal cell wall. Mode of action Local systemic fungicide with good protectant and antisporulant activity. Only the (Z)- isomer is intrinsically active, but, because of rapid interconversion of isomers in the light, it has no advantage over the (E)- isomer in practice. Uses Fungicide effective against Oomycetes, especially Peronosporaceae and Phytophthora spp. (but not Pythium spp.) in vines, potatoes, tomatoes and other crops. Used in combination with contact fungicides, and applied at 2.0-2.5 kg formulated product/ha. Formulation types DC; WG; WP.