| Herbicide Rate |
- 1-25 ppm
- 1 ppm for low density algae control
- 25 ppm for extreme density
|
| Breakdown / Inactivation |
- Rapidly dissociates into hydrogen peroxide and sodium carbonate
- Hydrogen peroxide is further degraded to water and oxygen
- Sodium carbonate is neutralized to sodium bicarbonate
- Half-life for this process is approximately eight hours – less than I day
|
| Microbial |
- Not sensitive to microbial degradation
|
| Adsorption |
- Sodium carbonate and hydrogen peroxide do not adsorb to sediment
|
| Photolysis |
- Not sensitive to photolysis
|
| Hydrolysis |
- Primary dissociation process of sodium percarbonate into peroxide
|
| Dissipation |
- Dissipation of little concern due to rapid dissociation
|
| Formulation |
|
| Liquid |
- Available in liquid formulation
|
| Solid |
- Available in solid formulation
|
| Mechanism of Action |
- Unclassified in WSSA Resistance Grouping
|
| Mode of Action |
|
| Contact |
- Sodium carbonate peroxyhydrate is transformed into hydrogen peroxide and sodium carbonate in the presence of water
- Hydrogen peroxide is the active component and works by exogenously oxidizing organic matter
- Hydrogen peroxide oxidizes critical cellular components of target organism and kills it
- For example: in lipid peroxidation, oxygen radicals react with unsaturated fatty acids in cell membrane phospholipids, sequentially damaging them and killing the cell in a chain reaction
- Oxygen radicals also react with other fatty acids, nucleic acids, and proteins in a similar manner
|
| Plant Growth Regulator |
- Not used as a plant growth regulator
|
| Stewardship |
|
| Herbicide resistance |
- Oxidizing agent – resistance is not an issue
|
| Waterbody Parameters | Management Considerations |
|---|
| Hydrology |
|
| Water depth |
- Important to know water depth to calculate appropriate dose
|
| Water volume |
- Accurate bathymetry is essential to calculate appropriate concentration
|
| Water movement |
- Not an issue with this tool
|
| Water chemistry |
|
| Dissolved oxygen (DO) |
- Applications should be made early in the day
- For heavy blooms or large waterbodies, treat no more than ½ of the waterbody
- Wait at least two days to treat the remainder of the waterbody
|
| pH, alkalinity, hardness |
- May dissociate faster in higher pH waters
|
| Nutrient content |
- May be an issue when controlling large areas of algae
|
| Water transparency |
- No issues related to this tool
|
| Sediment characteristics |
|
| Composition |
- Flocculent, organic sediments accelerate breakdown
|
| Potential for re-suspension |
- Flocculent or suspended organic particles accelerate breakdown
|
| Plant Physiology Parameters | Management Considerations |
|---|
| Plant origin / growth potential |
- Used mostly for planktonic algae control
- Not a management priority in FWC programs
|
| Native |
- Not used for native plant control in FWC funded programs
|
| Non-native |
- Not used for non-native plant control in FWC funded programs
|
| Invasive
|
- Sodium percarbonate was evaluated for lyngbya (Microseira wollei) control
- Not applied on an operational basis
|
| Plant growth stage (target/non-target) |
- Apply early in the season before blooms occur
|
| Plant susceptibility (target/non-target) |
- Planktonic algae control is not a priority of the FWC; therefore,
- FWC has not permitted or funded the operational use of hydrogen peroxide algaecides
- Cyanobacteria are prokaryotic, and lack organelles for photosynthesis
- Appear to be more sensitive to hydrogen peroxide than green algae or diatoms
|
| Potential for regrowth (target/non-target) |
- No issues related to this tool in FWC- funded programs
|
| Climate Parameters | Management Considerations |
|---|
| Weather |
Daily
- Manufacturer recommends applying earl in morning
Seasonally
- Apply before intense blooms develop
|
| Light intensity |
- Intense sunlight enhances product activity
|
| Water temperature |
- Warmer water enhances product activity
|
