|Frequently Asked Questions|
|Frequently Asked Questions|
One of the most important reasons for vegetation control in and around oil and gas facilities is to reduce forest and site fire hazards. Vegetation control also ensures compliance with government regulations.
Most of our "bare ground" programs industrial sites use products which will give control for up to one season. These herbicides have lower risks than long term sterilant type products, yet still give moderate term control. When doing "broadleaf" control in grass areas, heavy infestations of certain weeds such as Canada Thistle and Scentless Chamomile may need a 2nd application in a season.
Selective spraying means that only broadleaf species are targeted by the herbicide. Grass species are not injured. It does not mean that "spot spraying" is being done. This procedure is used for eradication and control of restricted and noxious broadleaf weeds. Non-selective spraying is a total vegetation kill application. This means that everything that is sprayed with the herbicide is totally eradicated.
Spot spraying refers to the targeting of individual plants or patches of plants. This type of application is used when there are only certain spots that require herbicide use. The main advantage of this type of application is that the herbicide use is reduced. The main disadvantage is that there may be missed weeds, especially in grass areas and the application time (and cost) increases.
A residual herbicide is one where the chemical stays active over a period of time and controls weeds and other vegetation with that action.
There are a lot of oilfield installations that are in pastures with livestock. Are these chemicals toxic to livestock?
Any time that livestock are grazing on the same land that requires spraying, this is taken into consideration and spraying is not done on that day. If there is a heavy infestation of weeds present, we advise our client of this and the landowner can be notified.
How toxic are the chemicals (herbicides) being applied?
LD50 is a laboratory measurement of toxicity. The lower the number, the more toxic a herbicide is. It is interesting to note that all of our herbicides have a LD50 of 2000 - 10,000. In comparison "Killex" (a dandelion killer commonly bought in hardware stores) has a LD50 of 300 - 1200. In essence, our chosen industrial herbicides are safer then an "over the counter" product which can be bought by any consumer. This being said, we recognize that "length of exposure" is an important issue with any herbicide application. Many of our products are non-toxic to sensitive species such as honey bees and fish.
Contact herbicide applications can be affected by rain. Generally with these types of treatments, we use surfactants or herbicides which can be applied within a few hours or in some cases minutes before a rainfall. Conversely, some herbicides are applied to be absorbed by the roots of a plant and rain is needed to move the chemical to the root zone.
What are my options to control Foxtail Barley?
Because Foxtail is a grass species it cannot be controlled with a broadleaf (selective) herbicide. To control it with a non-selective herbicide such as "Round Up" results in dead patches on the site, which in turn attracts more weeds. While fertilizer and overseeding can encourage competition from desirable grasses to help "choke out" the foxtail, it only limits new foxtail infestations and doesn't remove existing plants. One option is to apply Kerb 50 in the late fall. This product can result in good control the following spring, but is dependent on soil moisture conditions.
Why should I choose West Country Oilfield Services and Weed Control?
Our mission statement sums up the answer well: "West Country Oilfield Services will be a leader in industry, providing all services in a safe manner while utilizing the best technology available."
What is IVMAA registry?
IVMAA stands for Idustrial Vegetation Management Association of Alberta. The registry indicates whether or not a contractor or pesticide applicator has agreed to the terms as spelled out in the Protocol Manual " Industry Standards and Good Practices for Vegetation Management ". Companies wishing to display these signs must agree to the Manual's terms and sign off a sheet indicating their commitment to them.