Helm Sulfentrazone 4FPlant Protection Product ComparisonPlant Protection Product ComparisonReport inaccuraciesReport inaccuracies

DIRECTIONS FOR USE
It is a violation of Federal Law to use this product in a manner inconsistent with its labeling. DO NOT apply this product in a way that will contact workers or other persons, either directly or through drift. Only protected handlers may be in the area during application. For any requirements specific to yourState orTribe, consult the agency responsible for pesticide regulation. This product may only be used to control weeds listed on this label in use sites on this label. DO NOT apply more than the labeled amount of HELM SULFENTRAZONE 4F per acre per twelve month period as stated in this label. The twelvemonth period begins at the time of initial HELM SULFENTRAZONE 4F application.

RESISTANCE MANAGEMENT
The development of herbicide resistance is well understood, however it is not easily predicted. When herbicides that affect the same biological site of action are used repeatedly over several years to control the same weed species in the same field, naturally-occurring resistant biotypes may survive a correctly applied herbicide treatment, propagate, and become dominant in that field. Adequate control of these resistant weed biotypes cannot be expected. If weed control is unsatisfactory, it may be necessary to retreat the problem area using a product affecting a different site of action.
Herbicides should be used in conjunction with the resistance management strategies in the area to better manage herbicide resistance through delaying the proliferation and possible dominance of herbicide resistant weed biotypes. It may be necessary to change cultural practices within and between crop seasons such as using a combination of tillage, retreatment, tank-mix partners and/or sequential herbicide applications that have a different site of action. Weed escapes that are allowed to go to seed will promote the spread of resistant biotypes. It is advisable to keep accurate records of pesticides applied to individual fields to help obtain information on the spread and dispersal of resistant biotypes.
Consult your agricultural dealer, consultant, applicator, and/or appropriate state agricultural extension service representative for specific alternative cultural practices or herbicide recommendations available in your area.
If herbicide resistance should develop in the area to Group 14 Herbicides, this product used alone may not continue to provide sufficient levels of weed control. If the reduced levels of control cannot be attributed to improper application techniques, improper use rates, improper application timing, unfavorable weather conditions or abnormally high weed pressure, a resistant strain of weeds may havedeveloped. To reduce the potential for weed resistance use this product in a rotation program with other classes of chemistry and modes of action.
Always apply this product at the recommended rates and in accordance with the use directions. DO NOT use less than recommended label rates alone or in tank mixtures. DO NOT use reduced rates of the tankmix partner. For optimum performance, scout fields carefully before sulfentrazone application for weed identification and growth stage. Begin applications before weeds emerge or when weeds are small. It is recommended that fields be scouted after sulfentrazone application to look for poor performance or possible resistance. If resistance is suspected, report herbicide failure to local extension specialists, certified crop advisors, and/or sulfentrazone registrants.

Mode of Action
The active ingredient in HELM SULFENTRAZONE 4F is a potent inhibitor of the enzyme Protoporpyrinogen Oxidase IX (PPO IX) which is essential for the formation of chlorophyll. Inhibition of PPO IX enzyme results in the liberation of singlet oxygen (O) that, in turn, disrupts cellular membranes and causes cellular injury and leakage. The ultimate manifestation of the process is cell death leading to plant death. The selective herbicidal activity of HELM SULFENTRAZONE 4F is based on its greater affinity for the PPO IX enzyme in weed species versus crop plants.

Mechanism of Action
Following the application of HELM SULFENTRAZONE 4F to soil, germinating seeds and seedlings take up HELM SULFENTRAZONE 4F from the soil solution. The amount of HELM SULFENTRAZONE 4F in soil solution, and available for weed uptake, is determined primarily by soil type, organic matter and soil pH. See information in Application Instruction section for more details on soil type and pH effects.

INSTRUCTIONS AND INFORMATION
PRODUCT INFORMATION
HELM SULFENTRAZONE 4F is a liquid flowable formulation. The product is a selective, soil-applied herbicide for the control of numerous susceptible broadleaf, grass and sedge weeds formulated as a 4 pounds per gallon flowable containing the active ingredient, sulfentrazone. Adequate rainfall/irrigation (1/2" to 1") is required for activation of HELM SULFENTRAZONE 4F. If adequate moisture is not received within 7 to 10 days after the HELM SULFENTRAZONE 4F treatment, a shallow incorporation may be needed to obtain desired weed control. When activating moisture is received after dry conditions, HELM SULFENTRAZONE 4F will provide a reduced level of control of susceptible germinating weeds. Soil applications of HELM SULFENTRAZONE 4F must be made before crop seed germination to prevent injury to the emerging crop seedlings. When applications after planting are delayed, injury may occur if seeds are germinating or if they are located near the soil surface. Observe all instructions, crop restrictions, mixing directions, application precautions, replanting directions, rotational crop guidelines and other label information of each product when tank mixing with HELM SULFENTRAZONE 4F. Users must follow the most restrictive directions for use and precautionary statements of each product in the tank mixture.