M-Cipal 500 SL

MCPA 50%

Crop Situations

MCPA can be applied to small grain cereals including wheat, barley, oats and rice, herbage seed crops, flax, linseed, agricultural grassland, amenity grassland, managed amenity turf, asparagus, maize and non crop areas.

Weed Susceptibility

The following species are particularly susceptible to MCPA

Amaranthus species

Brassica nigra

Cadaria species

Capsella bursa pastoris

Chenopodium album

Cirsium arvense

Convolvulus arvense

Galeopsis tetrahit

Papaver rhoeas

Plantago species

Ranunculus arvensis

Raphanus raphanistrum

Rumex species

Senecio jacobaea

Sonchus species

Sinapis arvense

Thlaspi arvense

Urtica urens

Xanthium species

Chemistry

IUPAC Name 4-(4-chloro-2-methylphenoxy) acetic acid.

Use

MCPA is a selective herbicide for the control of many common annual and perennial broad leaved weeds.

Environmental Profile

MCPA has been shown to pose no threat to the aquatic or terrestrial environment under normal use and quickly breakdown in soil and water to harmless metabolites.

Registration Status

MCPA has achieved wide scale registration throughout the Middle East countries.

Mode of Action

A selective, systemic, post emergence hormone type herbicide. It is absorbed mainly by the leaves and also by roots, and translocated throughout the plant via the symplastic pathway, tending to accumulate at meristematic regions.

The main effect is to mimic the effects of natural auxin, high concentrations of which cause an uncontrolled increase in cell divisions and differentiation. This causes the classic symptoms of epinasty which include twisting and bending of stems, petioles and leaves.

Finally changes in membrane permeability lead to the disruption of cell membranes and tissue collapse. Root destruction, leaf chlorosis, and senescence are rapidly followed by plant death.