Common name

methidathion

Product category

Insecticide, acaricide

Chemical name

S-2,3-dihydro-5-methoxy-2-oxo-1,3,4-thiadiazol-3-ylmethyl O,O-dimethyl phosphorodithioate; 3-dimethoxyphosphinothioylthiomethyl-5-methoxy-1,3,4-thiadiazol-2(3H)-one 

CAS Number

950-37-8

Molecular formula

C₆H₁₁N₂O₄PS₃

appearance

Colourless crystals

packing

application

Biochemistry

Cholinesterase inhibitor. 

Mode of action

Non-systemic insecticide and acaricide with contact and stomach action.  Uses

Control of a wide range of sucking and chewing insects (especially scale insects) and spider mites in many crops, e.g. pome fruit, stone fruit, citrus fruit, vines, olives, hops, cotton, potatoes, beet, alfalfa, oilseed rape, maize, sunflowers, safflowers, tobacco, hazels, and some vegetables, at 30-60 g/hl (0.3-1.8 kg/ha).

Formulation types

EC; UL; WP. 

Compatibility

Mixing with alkaline materials may reduce effectiveness.