Gengwei 55%SC

Overview

Gengwei 55%SC is a herbicide from Agritas, built on the HPPD inhibitor chemistry. It is used against broadleaf and grassy weeds in maize and sugarcane. Registered use on maize, sugarcane. Agritas supplies it through the Haryali Markaz network, where the staff know which pests and diseases are moving in your district this week and can tell you whether this is the right product for what you are actually seeing in the field.

Composition

Mesotrione+Atrazine

Type

Herbicide

Chemical group

HPPD inhibitor + Triazine (PSII inhibitor)

Pack size

400 ml, 800 ml

Controls

Recommended crops

Mode of action

Gengwei 55%SC combines 2 active ingredients, which broadens the range of pests covered and slows resistance:

• Selective herbicide that blocks pigment production, so susceptible weeds bleach white and die. Works through both leaves and soil.

• Selective herbicide taken up mainly by roots, blocking photosynthesis in the weed. Persists in soil, so follow the rotation restrictions on the label.

Dose & application

400 ml per acre

Rate: 400 ml per acre.

Water: 120–150 litres of water per acre with a flat-fan nozzle. Never a cone nozzle — it drifts onto the neighbour's field and misses your own.

Timing: Weed size decides the result more than the rate does. A weed at two to four leaves dies easily; the same weed three weeks later often survives a full dose.

Mixing: half-fill the tank, add the product, then top up with the agitator running. Spray it out the same day — a mix left standing overnight separates and blocks the nozzle.

Why it pays

Weeds take water, nitrogen and light before the crop gets any of it, and they take it in the first six weeks when the crop is deciding how much it will yield. One timely herbicide usually costs less than the two hand weedings it replaces, and it arrives on the day the weeds are small enough to die.

Field tips

Spray weeds, not soil — unless the label says pre-emergence, in which case spray moist, settled soil and do not disturb it afterwards. Working the ground after a pre-emergence spray breaks the layer and the weeds come straight through.

Clean the tank before and after. Herbicide left in a sprayer will damage the next crop it touches, and the damage shows up days later when nobody connects it to the tank.

Check what you are sowing next. Some herbicides stay active in the soil long enough to hurt the following crop.

Safety

Use a sprayer kept only for herbicides — traces left in a shared tank will damage the next crop you spray. Do not spray in wind, because drift onto a neighbouring broadleaf crop such as cotton causes serious damage. Note the label's restriction on what you may plant next in that field.