How to Control Broadleaf Weeds in Wheat?
Weed is one of the main effects for wheats’ yield. Weeds can compete with wheat for fertilizer, water, and sunshine, and affect seriously the growth, yield and quality of wheat. Weed seeds emerge out along with crop seedlings. If they are not controlled in early stages, it may reduce 10-65% of yield.
Weeds with the same life cycle as the crop tend to increase under abnormal use of herbicide or management. Annual weeds, particularly the broadleaf weeds, tend to be the most common weeds in wheat. Flixweed (Descurainia Sophia), corn gromwell (Lithospermum arvense), shepherd's purse (Capsella), chickweed (Stellaria media), docks (Rumex), weed silene (Silene conoidea), mallow (Malva), wild basil (Clinopodium) are most troublesome when wheat is grown continuously or every other year on the same land.
Weed Management in Wheat Field
Fallow Weed Management
Weed management during fallow periods is critical to conserve soil moisture, eliminate weed seed production and destroy pests and diseases. Herbicides and tillage can control weeds during fallow periods. Herbicides maintain greater residue cover than tillage, which helps to reduce soil erosion and increase soil water storage.
While tillage works well, it must be started shortly after harvest, or the soil may become too hard for the tillage equipment to handle. The number of tillage depends on precipitation, weeds present, slope, susceptibility to erosion, and the amount of crop residue the rig can handle. Sweep tillage keeps crop residues on the soil surface and provides very effective weed control when the soil is dry and temperatures are warm enough to dry out weeds quickly. More aggressive tillage may be required when the soil is moist. When the soil is moist, herbicides are typically a better option for weed control than tillage.
The most common crop rotation is continuous winter wheat, although rotations of wheat with canola, corn, sorghum, and soybean do occur. Continuous winter wheat, normal monoculture, is problematic for weed control because the constant use of the same class of herbicides often results in weed resistance or species transfer. Common rotation sequences when growing winter wheat include winter wheat-fallow, winter wheat-corn-fallow, winter wheat-sorghum-fallow, winter wheat-corn-soybean, and continuous winter wheat. Millet and sunflower are also often used in rotation with winter wheat.
In recent years, herbicides have been developed to selectively control broadleaf weeds in wheat. Herbicides have provided excellent control of broadleaf weeds, but for optimal weed control with the least crop damage, be sure to:
Correctly identify the problem weeds.
Apply herbicides when weeds are small and actively growing. Read and follow directions on the herbicide label.
Use proper spray equipment and not contaminated with previously used herbicides. Calibrate the sprayer to ensure application accuracy.
Know your rotational plans to avoid herbicide carryover problems to sensitive crops.
There is a good-feedbacked product, post-emergence herbicide for broadleaf weeds.
King’s Topic (Tribenuron-methyl 75% WG)
King’s Topic (Tribenuron-methyl 75% WG) is a selective herbicide with systemic action, and has outstanding effects on broadleaf weeds in wheat.
Post-emergence safe use for wheat
King’s Topic has no any damage to wheat when apply by following the instructions of the label.
Excellent systemic and rapid translocation action
King’s Topic has excellent control for broadleaf weeds by excellent systemic and rapid translocation action, and gives a better control when 2-4 leaves of broadleaf weeds.
Quick effect, weeds stop growing in 1 day after application
1 day after the application, weeds stop their growth by King’s Topic quick action.
Long lasting protection for 60 days
Weeds appear yellowing and stunting after 7 days of the application. And it could keep the good performance for 60 days.
Low dosage, and only 1 application per crop season
King’s Topic contains better functional active ingredient. Apply only 15-30 g per hectare, and only 1 application for a crop season.
Case efficacy are showed:
1 day later, weeds stop growing.
7 days later, weeds turn yellow.
14 days later, weeds wither away.
3-4 weeds later, weeds disappear.
(Data Source: King Quenson Tech Team 2022)
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