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Submodule 8: How Invasive Plants Are Controlled
You have completed Submodule 8.
Complete the interactive exercises for Submodule 8 to see how much you have learned.
Exercises open in a separate window.
Summary: Major Points from Submodule 8
- Several methods are used to control weed infestations. These methods have been tested, used, and revised over the course of many years and many applications.
- Research and experience have demonstrated that there are several steps to be taken to maximize success in controlling weed infestations.
- Biological control is one strategy used in weed control. Scientist search for and study living organisms such as insects, fungi, and bacteria that in some way harm the invasive plant. Great care is taken to ensure that these organisms do not harm other plants or animals. Grazing animals such as sheep and cattle have also been used for biological control of weeds. In some cases, great success in weed control has been achieved using this method.
- Mechanical control methods also provide an effective means of weed management. Methods as simple as pulling weeds out by hand to more complex strategies such as controlled burns and solarization have been successfully used.
- Chemical control involves the use of herbicides, which are compounds that somehow interfere with the growth, development, and/or reproduction of weeds. As with all control methods, it is critical to understand the short-term and long-term effects of applied control methods.
- Several plant characteristics can influence how plants will react to control methods.
- In addition, many environmental factors also need to be taken into consideration when selecting a weed management strategy. Soil conditions and terrain are also factors in the selection of weed control strategies.
- Often, several methods are combined into an overall approach to weed control. Integrated weed management (IWM) establishes a decision support system with coordinated efforts to get the most out of available resources.
When you are ready, proceed to Submodule 9.
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