other name:6,7-dihydrodipyrido[1,2-a:2',1'-c]pyrazinediium dibromide
CAS No.: [ 85-00-7 ]
Molecular Formula: C20H20FNO4
Diquat dibromide is a selective herbicide that controls most unwanted target week species in freshwaters (e.g elodea, egeria, lagarosiphon and hornwort). Many key native plant species are n ot affected (e.g. chara and nitella species) by diquat.
When Diquat dibromide comes into contat with the greenparts of nuisance aquatic weeds (leaves and stems) it is rapidly adsorbed producing peroxide that acts like a bleach disiccating plant tissue and disrepting cell membranes. Diquat Dibromide affects the tissue it comes in cotact with and is not moved around within the plant, so roots are not kiled.
Diquat is rapidly removed from water and deactivated by adsortion onto inorganic and organice compounds in the water and sediments. When water is trubid or the plants are covered with silt or an algal coating, the efficacy of using Diquate Dibromide will be very lower.
During photosynthesis, superoxide is generated, which damages cell membranes and cytoplasm.
Mode of action
Non-selective contact herbicide and desiccant, absorbed by the foliage, with some translocation in the xylem.
Pre-harvest desiccation of cotton, flax, alfalfa, clover, lupins, oilseed rape, poppies, soya beans, peas, beans, sunflowers, cereals, maize, rice, sugar beet, and other seed crops; destruction of potato haulms; and stripping of hops. Control of annual broad-leaved weeds in vines, pome fruit, stone fruit, bush fruit, strawberries (also control of runners), citrus fruit, olives, hops, vegetables, ornamental plants and shrubs, and other crops. Control of emergent and submerged aquatic weeds. Weed control on non-crop land. Weed control and tassel inhibition in sugar cane. Application rates 400-1000 g/ha.
Formulation types SL; Gel.
|Appearance||Red brown homogeneous liquid
|Ethylene Dibromide||100ppm max.|
|Free 2,2’-bipyridyl||1.0% max.|
GHS complaint Safety Data Sheet (SDS) for commercial product of Cyhalofop butyl is available uopn requested.