FORMULATION SPECIFICALLY DESIGNED FOR PRE-EMERGENCE HERBICIDE APPLICATIONS.
KOVER™
Kover™ is designed to improve the contact, wetting and adhesion of pre-emergence herbicides to soil surfaces. Kover™ forms a soft, microscopic film that polymerizes, protecting spray deposits from rainfall erosion, volatility, and ultraviolet (UV) degradation.
HELPS IMPROVE RESIDUAL HERBICIDE CONTROL, UV BREAKDOWN, AND
VOLATILIZATION
IMPROVES AGROCHEMICAL EFFICACY OF THE APPLIED PRE-EMERGENT
REDUCES LATERAL MOVEMENT
AND LEACHING
MINIMAL PHYTOTOXICITY RISK TO CROP
MORE CONSISTENT
EFFICACY OF BARE GROUND CONTROL FOR
INDUSTRIAL VEGETATION
MANAGEMENT
APPLICATIONS
SUMMARY
Kover™ is effective in limiting the leaching and migration of soil applied pre-emergent herbicides. Once applied, it begins to polymerize and form an elastic, microscopic film on the soil surface. This in turn, helps to provide longevity of pre-emergent herbicide in the root and shoot zone, thereby maximizing the pre-emergent herbicide activity in the target area.
Once applied,
herbicides begin
to degrade in the
environment in a
number of ways.
Kover™ helps
to mitigate a
portion of these
environmental
factors within
the soil.
THE SOLUTION
The aim of this trial is to assess the effectiveness of combining Kover™ (Pinene (terpene) Polymers, petrolatum, alkyl amine ethoxylate – 100%) with Pendimethalin (Kover + 1L Stomp Xtra) as a pre-emergent herbicide treatment for weed control in leeks. The replicated trial will evaluate the efficacy of this combination in suppressing weed growth while ensuring the safety and health of leek plants. Key objectives include determining the optimal application timing and rates, assessing compatibility between the two products, and monitoring their impact on leek yield and overall crop development under typical field conditions.
3rd March - 38 Days Post Application Results
Control – Stomp Xtra Pre-Planting
1L Kover + 1L Stomp Xtra
38 Days Post Application Results
– Weed Results
When comparing the weed emergence at 38 days post-application, it was evident that the treated blocks all had prolonged weed control, indicating the efficacy of Kover™ in holding the Pendimethalin in the upper soil profile. The weeds below had been minimized in the treated block when compared to the control plots.
HOW IT WORKS
“Kover™ helps keep soil applied herbicides where they’re needed most—right in the root and shoot zone. After application, it forms a thin, flexible film through a polymerization process. This barrier slows herbicide movement through the soil, extending their effectiveness in the target area and reducing loss from leaching.
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Peat Soil
Kover treatments significantly reduced weed populations, with the highest level of suppression reaching 87.27%. The enhanced effectiveness observed in peat soils may be attributed to their high organic matter content, which improves herbicide retention and interaction, leading to greater weed control.
Sedimentary/Sandy Soil:
While Kover still reduced weed counts in sandy soils, the level of suppression was less pronounced compared to peat soils, with the highest observed reduction reaching 55.1%. The lower organic matter and larger particle size of sandy soils may have contributed to reduced herbicide retention and increased leaching potential, potentially shortening the overall weed control effectiveness.
CONCLUSION
Kover helped keep the herbicide in the active zone for a longer period, enhancing its effectiveness by improving herbicide retention and reducing the potential for leaching. The higher organic matter in peat soil likely enhanced the treatment's effectiveness, with increased soil moisture and nutrient availability supporting better herbicide action. In sedimentary/sandy soils, while the results were more moderate, the combination still provided notable reductions in weed populations. This demonstrated the broad utility of this product combination for pre-emergence weed control across different soil types.
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Technical Team
Ethan England
Technical Consultant Bay Of Plenty at Biolchim
New Zealand
Johan Lubbe
Technical Consultant Central / Lower North Island at Biolchim
New Zealand
Johnny McMillan
Technical Consultant South Island at Biolchim New Zealand