Credit 3.5: Herbicides, Pesticides, and Fertilizers
This credit discourages use of synthetic or inorganic herbicides, pesticides, or fertilizers in routine landscape maintenance.
For the purposes of GSH, “cosmetic use” is defined as used for non-essential purposes; i.e. purely aesthetic function.
Where this credit applies
This credit applies to any type of project that involves landscape establishment and maintenance, particularly in riparian areas.
How to proceed
Complete the Landscape Maintenance Checklist in Appendix A to show that landscaping is being managed without the use of synthetic herbicides, pesticides, or fertilizers. Use these chemicals only in the case of severe infestations, as deemed necessary by a certified professional. Where that is the case, make sure to follow the label instructions and to comply with local bylaws or regulations regarding the use of pesticides and herbicides.
In some jurisdictions, the use of chemical pesticides, herbicides, and fertilizers is prohibited within a certain distance of a water body; for example, 50 feet in the City of Seattle. In others, the use of these substances for cosmetic purposes is prohibited. Many retailers have information on what products can be used to comply with local pesticide bylaws. In both Washington State and BC, non-cosmetic use for control of pest outbreaks and widespread invasive species must follow an Integrated Pest Management Plan using trained personnel. Information sources on alternative methods for managing pests, weeds and invasive plant species, along with IPM methods, are listed in the “For more information” section.
The following steps will help to achieve this credit:
- Landscape with native plants or hardy non-native plants that require minimal chemical application, if any. Avoid plants with known susceptibility to disease or those that require high nutrient or chemical inputs to survive in existing soils. Do not use plants identified on local or regional invasive plant lists.
- Avoid or eliminate the use of herbicides to control weeds in lawns and gardens. Rely instead on regular hand-removal of weeds combined with adequate natural soil amendment. Manual removal of weeds can be supplemented with spot treatment using approved insecticidal soaps, vinegar-based compounds, and plain old boiling water.
- Eliminate use of synthetic quick release fertilizers. Use natural amendments that contain all natural ingredients (composted manure, blood meal, bone meal, kelp meal, tea, composted fish-waste, etc.) and no petrochemical or synthetic ingredients. Do not apply approved fertilizers at a rate that exceeds 1 lb nitrogen / 1,000 ft2.
- Eliminate use of pesticides. Regular maintenance of plant health is the best approach to preventing pest problems. If pest populations cause a widespread and significant decline in plant health on your property, use Integrated Pest Management-approved biological controls. Never use the compounds listed below in shoreline areas.
Don’t use these!
The following compounds pose high risk to salmon and other aquatic species, and must not be used in shoreline and riparian areas (from Salmon-Safe Certification Standards for Residential Development Draft 2.2).
1,3-dichloropropene 2,4-D Abmectin
Acephate Altacor Atrazine
Bensulide Bentazon Bifenazate
Bifenthrin Bromoxynil Carbaryl
Carbofuran Carfentrazone-ethyl Chlorothalonil
Chlorpyrifos Copper Sulfate1 Cyhalothrin
Cypermethrin Diazinon Dicamba
Dichlobenil Diclofop-methyl Difl ubenzuron
Dimethoate Disulfoton Diuron
Esfenvalerate Ethoprop Extoxazole Technical
Fenamiphos Fenpyroximate Fenbutatin-Oxide
Folpet Imidacloprid Iprodione
Linuron Malathion Mancozeb
Maneb Metolachlor Metribuzin
Naled Norfl urazon Oryzalin
Oxyfluorfen Paraquat Dichloride Pendimethalin
Prometryn Propargite Propiconazole
Rimon Quintozene Rimon
Simazine Spinosyn Triclopyr
This credit offers 2 base points.
|Herbicides, Pesticides, and Fertilizers||
|Manage landscaping without the use of synthetic pesticides, herbicides and fertilizers.||
For more information
BC Environment. Pesticides and Pest Management. http://www2.gov.bc.ca/gov/theme.page?id=9C0666DDF79681160264E5B0EC29ECFB
Salmon-Safe Certification Standards for Residential Development http://www.salmonsafe.org/getcertified/residential-development