How Ethofumesate Enhances Weed Control in Sugar Beet and Turf Management

Introduction

Ethofumesate is a selective pre- and post-emergence herbicide used primarily in sugar beet and turfgrass to control annual grasses and some broadleaf weeds. Its residual activity and compatibility with tank mixes make it an essential component of integrated weed control programs.

Product Information

• Name: Ethofumesate

• Chemical Name: (±)-2-ethoxy-2,3-dihydro-3,3-dimethyl-5-benzofuranyl methanesulfonate

• CAS Number: 26225-79-6

• Appearance: Colorless to light yellow liquid

• Formulations: EC (Emulsifiable Concentrate), SC (Suspension Concentrate)

• Application Method: Soil and foliar spray

Key Features

• Dual action: Works both pre- and early post-emergence

• Effective on annual grasses and select broadleaf weeds

• Provides soil residual activity for prolonged weed suppression

• Widely used in sugar beet, fodder beet, and turfgrass

• Compatible with phenmedipham and desmedipham for enhanced control

Applications

Mode of Action

Ethofumesate inhibits cell division and growth in germinating weeds by affecting mitosis in root and shoot cells. It also provides residual soil activity to suppress subsequent weed emergence.

Advantages

• Controls both early-emerging weeds and those germinating later

• Excellent sugar beet selectivity, safe for young crops

• Residual activity reduces follow-up herbicide needs

• Effective when combined with phenmedipham and desmedipham in beet programs

Limitations

• Limited efficacy on established weeds beyond early stages

• Does not control all broadleaf weeds—requires tank mixes for complete control

• Sensitive to soil moisture conditions for activation

FAQs

Q: Why is ethofumesate often used in combination treatments?
A: It complements contact herbicides like phenmedipham and desmedipham by adding residual soil activity and broadening weed control spectrum.

Q: Is ethofumesate safe for overseeded turfgrass?
A: Yes, when applied at recommended rates, it helps control grassy weeds without harming new seedlings.

Q: Does it work well in dry soil?
A: Adequate soil moisture is necessary for activation and optimum pre-emergence performance.

Conclusion

Ethofumesate is an effective herbicide for sugar beet and turfgrass weed management, providing pre- and post-emergence control with residual activity. Its compatibility with other beet herbicides makes it an integral part of modern weed control programs.