Sonar® Genesis Label

Sonar® Genesis Label



Corrosive. Causes irreversible eye damage. Harmful if swallowed.  Avoid contact with skin. Do not get in eyes or on clothing. Wear protective eyewear (goggles, face shield, or safety glasses). Wear long-sleeved shirt and long pants, socks, shoes, and chemical resistant gloves. Wash thoroughly with soap and water after handling and before eating, drinking, chewing gum, using tobacco or using the toilet.  Remove and wash contaminated clothing before reuse.



Si usted no entiende la etiqueta, busque a alguien para que se la explique a usted en detalle. (If you do not understand the label, find someone to explain it to you in detail.)



Do not apply to water except as specified on the label. Do not contaminate water by disposal of equipment washwaters. Lowest rates should be used in shallow areas where the water depth is considerably less than the average depth of the entire treatment site, for example, shallow shoreline areas. Trees and shrubs growing in water treated with Sonar® Genesis aquatic herbicide may occasionally develop chlorosis. Follow use directions carefully so as to minimize adverse effects on non-target organisms.


It is a violation of Federal Law to use this product in a manner inconsistent with its labeling. Read all Directions for Use carefully before applying.

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 your state or tribe, consult the agency responsible for pesticide regulation.

Ensure spray drift to nontarget susceptible species does not occur.

DO NOT apply Sonar® Genesis Aquatic Herbicide in any manner not specifically described in this label.

Observe all cautions and limitations on this label and on the labels of products used in combination with Sonar® Genesis. dO NOT use Sonar® Genesis other than in accordance with the instructions set forth on this label.  Keep containers closed to avoid spills and contamination.


In case of large-scale spillage regarding this product, call INFOTRAC at 1-800-535-5053.

In case of medical emergency regarding this product, call:

  • Your local doctor for immediate treatment
  • Your local poison control center (hospital)
  • INFOTRAC: 1-800-535-5053

Steps to be taken in case material is released or spilled:

  • Dike and contain the spill with inert material (sand, earth, etc.) and transfer liquid and solid diking material to separate containers for disposal.
  • Remove contaminated clothing, and wash affected skin areas with soap and
  • Wash clothing before
  • Keep the spill out of all sewers and open bodies of


Sonar® Genesis is a selective systemic aquatic herbicide for management of freshwater aquatic vegetation in ponds, lakes, reservoirs, drainage canals and irrigation canals, including dry or de- watered areas of these sites. Sonar® Genesis is absorbed from water by plant shoots and from hydrosoil by the roots of aquatic vascular plants. For in-water treatments, it is important to maintain the specified concentration of Sonar® Genesis in contact with the target plants for a minimum of 45 days. Rapid water movement or any condition which results in rapid dilution of Sonar® Genesis in treated water will reduce its effectiveness. In susceptible plants, Sonar® Genesis inhibits the formation of carotene. In the absence of carotene, chlorophyll is rapidly degraded by sunlight. Herbicidal symptoms of Sonar® Genesis appear in seven to ten days and appear as white (chlorotic) or pink growing points in many susceptible plant species. Under optimum conditions, a minimum of 30 to   90 days may be required before the desired level of aquatic plant management is achieved. Plant species susceptibility to Sonar® Genesis may vary depending on time of year, stage of growth, and

water movement. For best results, apply Sonar® Genesis prior to initiation of weed growth or when weeds begin active growth. Application to mature target plants may require an application rate at the higher end of the specified rate range and may take longer to control.

Sonar® Genesis is not corrosive to application equipment.

This label provides recommendations on the use of a laboratory analysis for the active ingredient. SePRO Corporation recommends the use of high-performance liquid chromatography (HPLC) for the determination of fluridone concentrations in water. It is recommended to contact SePRO Corporation for the incorporation of this test, known as a FasTEST, in a treatment program.

FasTEST is referenced in this label as the preferred method for the rapid determination of the active ingredient in water. Other proven chemical analyses for the active ingredient may also be used.

Application rates and calculations of Sonar® Genesis are provided to achieve a desired concentration of fluridone in parts per billion (ppb). The maximum application rate or sum of all application rates is 90 ppb in ponds and 150 ppb in lakes, reservoirs and static canals per annual growth cycle. For purposes of Sonar® Genesis labeling, a pond is defined as a body of water 10 acres or  less in size. A lake or reservoir is greater than 10 acres. This maximum concentration is the amount of product calculated as the target application rate, NOT determined by testing the concentration of fluridone in the treated water.

Use Restrictions and Precautions

  • Obtain Required Permits: Consult with appropriate state or local pesticide and/or water authorities before applying this product in or around public waters. Permits and posting or treatment notification may be required by state or local public agencies.
  • Chemigation: Do not apply Sonar® Genesis through any type of irrigation system.
  • Hydroponic Farming: Do not use Sonar® Genesis treated water for hydroponic farming unless a FasTEST has been run and confirmed that concentrations are less than 1
  • Greenhouse and Nursery Plants: Consult with SePRO Corporation for site-specific recommendations prior to any use of Sonar® Genesis treated water for irrigating greenhouse or nursery plants. Without site-specific guidance from SePRO, do not use Sonar® Genesis treated water for irrigating greenhouse or nursery plants unless a FasTEST has been run and confirmed that concentrations are less than 1 ppb.

•    Water Use Restrictions Following Applications With Sonar® Genesis (days)

Application Rate  






livestock/Pet Consumption  


Maximum Rate (150 ppb) or less  








See irrigation instructions below

Note below, under Potable Water Intakes, the information for application of Sonar® Genesis within ¼ mile (1,320 feet) of a functioning potable water intake.

†† Note below, under Irrigation, specific time frames or fluridone concentrations that provide the widest safety margin for irrigating with treated water.

  • Potable Water Intakes: In lakes and reservoirs or other sources of potable water, do not apply Sonar® Genesis at application rates greater than 20 ppb within one-fourth mile (1,320 feet) of any functioning potable water intake. At application rates of 4 to 20 ppb, Sonar® Genesis may be applied where functioning potable water intakes are present. NOTE: Existing potable water intakes which are no longer in use, such as those replaced by potable water wells or connections to a municipal water system, are not considered to be functioning potable water intakes.
  • Irrigation: Irrigation from a Sonar® Genesis treated area may result in injury to the irrigated vegetation. Follow these precautions and inform those who irrigate from areas treated with Sonar® Genesis of the irrigation time frames or FasTEST requirements presented in the table Follow the following time frames and assay directions to reduce the potential for injury to vegetation irrigated with water treated with Sonar® Genesis. Greater potential for crop injury occurs where Sonar® Genesis treated water is applied to crops grown on low organic and sandy soils.




Application Site


Established Tree Crops

Established Row Crops/ Turf/Plants Newly Seeded Crops/Seedbeds or Areas to be Planted Including Overseeded Golf Course Greens
Ponds and Static Canals † 7 30 Assay required
Canals 7 14 Assay required
Lakes and Reservoirs †† 7 14 Assay required
Dry or De-watered Canals ††† 0 0 †††

† For purposes of Sonar® Genesis labeling, a pond is defined as a body of water 10 acres or less in size. A lake or reservoir is greater than 10 acres.

†† In lakes and reservoirs where one-half or greater of the body of water is treated, use the pond and static canal irrigation precautions. When applying Sonar® Genesis to exposed sediments of aquatic sites such as lakes and reservoirs, follow these time frames prior to using water for irrigation once sites are reflooded.

†††   When Sonar® Genesis is applied to exposed sediments of dry or de-watered irrigation canals, treatments must be made at least 2 weeks prior to when the canals are to be refilled, and allow canals to refill for a minimum of 24 hours before using water for irrigation.

Where the use of Sonar® Genesis treated water is desired for irrigating crops prior to the time frames established above, the use of FasTEST analysis is recommended to measure the concentration of fluridone in the treated water. Where a FasTEST has determined that the fluridone concentrations are less than 10 parts per billion, there are no irrigation precautions for irrigating established tree crops, plants, row crops or turf.  For tobacco, tomatoes, peppers or other plants within the Solanaceae Family and newly seeded crops or newly seeded grasses such as overseeded golf course greens, do not use Sonar® Genesis treated water if measured fluridone concentrations are greater than 5 ppb. Furthermore, when rotating crops, do not plant members of the Solanaceae family in land that has been previously irrigated with fluridone concentrations in excess of 5 ppb in the previous year without direct consultation with a SePRO Aquatic Specialist. It is recommended that a SePRO Aquatic Specialist be consulted prior to commencing irrigation of these sites.


Sonar® Genesis selectivity is dependent upon dosage, time of year, stage of growth, method of application and water movement. The following categories, controlled and partially controlled are provided to describe expected efficacy under ideal treatment conditions using higher to maximum label rates. Use of lower rates will increase selectivity of some species listed as controlled or partially controlled. Additional aquatic plants may be controlled, partially controlled, or tolerant to Sonar® Genesis. It is recommended to consult a SePRO Aquatic Specialist prior to application of Sonar® Genesis to determine a plant’s susceptibility to the planned treatment.

Vascular Aquatic Plants Controlled by Sonar® Genesis: Submersed Plants:

bladderwort (Utricularia spp.)

common coontail (Ceratophyllum demersum) common elodea (Elodea canadensis) egeria, Brazilian elodea (Egeria densa) fanwort, cabomba (Cabomba caroliniana) hydrilla (Hydrilla verticillata)

naiad (Najas spp.)

pondweed (Potamogeton spp., except Illinois pondweed)

watermilfoil (Myriophyllum spp., including M. spicatum x sibiricum hybrids)

Emersed Plants: spatterdock (Nuphar luteum) water-lily (Nymphaea spp.) watershield (Brasenia schreberi)

Floating Plants:

common duckweed (Lemna minor) Salvinia (Salvinia spp.)

Vascular Aquatic Plants Partially Controlled by Sonar® Genesis: Submersed Plants:

Illinois pondweed (Potamogeton illinoensis) limnophila (Limnophila sessiliflora)

tapegrass, American eelgrass (Vallisneria americana)

Emersed Plants:

alligatorweed (Alternanthera philoxeroides) American lotus (Nelumbo lutea)

cattail (Typha spp.)

creeping waterprimrose (Ludwigia peploides) parrotfeather (Myriophyllum aquaticum) smartweed (Polygonum spp.)

spikerush (Eleocharis spp.) waterpurslane (Ludwigia palustris)

Floating Plants:

common watermeal (Wolffia columbiana)

Shoreline Grasses: barnyardgrass (Echinochloa crusgalli) giant cutgrass (Zizaniopsis miliacea)

reed canarygrass (Philaris arundinaceae) southern watergrass (Hydrochloa caroliniensis) torpedograss (Panicum repens)

† Consult with a SePRO Aquatic Specialist about techniques to enhance efficacy of watermeal, including incorporation of Galleon S.C. Aquatic Herbicide into a Sonar® Genesis treatment program, in difficult to control sites.


The aquatic plants present in the treatment site should be identified prior to application to determine their susceptibility to Sonar® Genesis. It is important to determine the area (acres) to be treated and the average depth in order to select the proper application rate. Do not exceed the maximum labeled rate for a given treatment site per annual growth cycle.

Sonar® Genesis may be applied or metered directly into the treated area or diluted with water prior to application. Add the specified amount of Sonar® Genesis to water in the spray tank during the filling operation. Surface and subsurface application of the spray can be made with conventional spray equipment. Sonar® Genesis can also be applied near the surface of the hydrosoil using weighted trailing hoses.  A minimum spray volume of 5 to 100 gallons per acre may be used.

Sonar® Genesis may also be directly metered into the pumping system where it is diluted with water.

Tank Mix directions

Sonar® Genesis may be tank mixed with other aquatic herbicides and algaecides to enhance efficacy and plant selectivity provided that this label does not prohibit such mixing. When tank mixing, read and follow the labeled precautionary statements, directions for use, weeds controlled, and other restrictions for each tank mix product. Use in accordance with the most restrictive label limitations and precautions of the products used in the tank-mix. No labeled rate or dose should be exceeded. To ensure compatibility, a jar test is recommended before field application of any tank mix combination.  It is recommended to consult with SePRO Corporation for latest tank mix recommendations.

NOTE: Tank mixing or use of Sonar® Genesis with any other product which is not specifically and expressly authorized by the label shall be at the exclusive risk of the user, applicator and/or application adviser, to the extent allowed by applicable law.

Application Rate Calculation

The amount of Sonar® Genesis to be applied to provide the desired ppb concentration of active ingredient in treated water may be calculated as follows:

Sonar® Genesis gallons required per treated surface acre = surfaces acres X average water depth of treatment site (feet) x desired ppb concentration of active ingredient x 0.0054.

For example, the amount per acre of Sonar® Genesis required to provide a concentration of 30 ppb of active ingredient in a 1 acre pond with an average depth of 5 feet is calculated as follows:

1 acre x 5 feet x 30 ppb x 0.0054 = 0.81 gallons per treated surface acre or

0.81 gallons x 4 quarts/gallon = 3.2 quarts per treated surface acres or

0.81 gallons x 128 ounces/gallon = 104 ounces per treated surface acre

Application to Ponds

Sonar® Genesis may be applied to the entire surface area of a pond. For single applications, rates may be selected to provide 30 to 90 ppb to the treated water. Use the higher rate within the rate range where there is a dense weed mass, when treating more difficult to control species, and for ponds less than 5 acres in size with an average depth less than 4 feet.  Application rates necessary to obtain these concentrations are shown in the following table. For additional application rate calculations, refer to the Application Rate Calculation section of this label. Split or multiple applications may be used to control more difficult target plants and/or where dilution of treated water is anticipated; however, the sum of all applications must not exceed a total of 90 ppb per annual growth cycle.

Average Water depth of Treatment Site (feet) Gallons of Sonar® Genesis per Treated Surface Acre
30 ppb 90 ppb
1 0.16 0.48
2 0.32 0.97
3 0.48 1.45
4 0.64 1.94
5 0.81 2.43
6 0.97 2.91
7 1.13 3.40
8 1.29 3.88
9 1.45 4.37
10 1.62 4.86

† To calculate the number of quarts of Sonar® Genesis required, use the calculation as follows: gallons per surface acre x 4 quarts/gallon = quarts per surface acre

For example: targeting a concentration of 30 ppb in a one acre pond with average depth of 5 feet would require 0.81 gallons or 3.2 quarts.

Application to lakes and Reservoirs

The following treatments may be used for treating both whole lakes or reservoirs and partial areas of lakes or reservoirs (bays, etc.). For best results in treating partial lakes and reservoirs, Sonar® Genesis treatment areas should be a minimum of 5 acres in size. Treatment of areas smaller than 5 acres or treatment of narrow strips such as boat lanes or shorelines may not produce satisfactory results due to dilution by untreated water. Rate ranges are provided as a guide to include a wide range of environmental factors, such as, target species, plant susceptibility, selectivity and other aquatic plant management objectives. Application rates and methods should be selected to meet the specific lake/reservoir aquatic plant management goals.

A.  Whole lake or Reservoir Treatments (limited or No Water discharge)

Single Application to Whole Lakes or Reservoirs

Where single applications to whole lakes or reservoirs are desired, apply Sonar® Genesis at an application rate of 10 to 90 ppb. Application rates necessary to obtain these concentrations in treated water are shown in the following table. For additional rate calculations, refer to the Application Rate Calculation section of this label. Choose an application rate from the table below to meet the aquatic plant management objective. Where greater plant selectivity is desired such as when controlling Eurasian watermilfoil and curlyleaf pondweed, choose an application rate lower in the rate range. For other plant species, it is recommended to contact a SePRO Aquatic Specialist for determining when to choose application rates lower in the rate range to meet specific plant management goals. Use the higher rate within the rate range where there is a dense weed mass or when treating more difficult to control plant species. Retreatments may be required to control more difficult to control species or in the event of a heavy rainfall event where dilution of the treatment concentration has occurred. In these cases, a second application or more may be required; however, the sum of all applications cannot exceed 150 ppb per annual growth cycle. Refer to the section of this label entitled, Split or Multiple Applications to Whole Lakes or Reservoirs, for guidelines and maximum rate allowed.


Average Water depth of Treatment Site (feet)

Gallons of Sonar® Genesis per Treated Surface Acre to Achieve
10 ppb 90 ppb
1 0.05 0.48
2 0.10 0.97
3 0.16 1.45
4 0.21 1.94
5 0.27 2.43
6 0.32 2.91
7 0.37 3.40
8 0.43 3.88
9 0.48 4.37
10 0.54 4.86

† To calculate the number of quarts of Sonar® Genesis required, use the calculation as follows: gallons per surface acre x 4 quarts/gallon = quarts per surface acre

For example: targeting a dose of 10 ppb in a 20 acre lake with average depth of 5 feet would require 0.27 gallons per surface acre or 1.0 quarts.