|The introduction and spread of non-native invasive plant species is becoming an increasing problem in British Columbia. These unwelcome weeds negatively impact the environment, public and animal health, forest management, agriculture, range, recreation, First Nations values and the economy. This invasive plant strategy was developed for Tolko Industries Ltd. in co-operation with the Ministry of Forests and Range (MOFR) and other stakeholders. The area addressed by this strategy is a pilot study area that extends from Heffley Creek to Clearwater along the North Thompson valley. To provide information for this strategy, a cursory invasive plants inventory was conducted in the early fall of 2005. This data complimented a MOFR inventory undertaken the previous year utilizing the same methodology. The 2005 survey covered areas that weren’t surveyed in 2004, and the data was combined. Abundant invasive plant infestations that were found throughout the area were sketch mapped, in addition to site-specific spatial, size and distribution information collected for other invasive plant species of concern. In total, 1,266 specific infestations were identified, with thirteen different plant species documented. This information and other factors, including MOFR direction from the draft Southern Interior Forest Region (SIFR) invasive plant strategy, were utilized to develop specific plant strategies for species of concern. Most of these plants were rated very to extremely invasive in the SIFR, and were divided into four groups: 1 Plants found close to the pilot area that are a priority for physical or chemical treatment. 2 Plants not found close to the pilot area and are rarely or not found in the SIFR, but are a priority for physical or chemical treatment. 3 Plants with infestations in the pilot area that are not presently a priority for direct control, but would be treated if funding increased. 4 Plants that have good biocontrol agents available that would be released on new infestations. General strategies to reduce overall invasive plant introduction and spread were detailed as well, including: education, methods to reduce weed movement (e.g. by people, animals and vehicles), weed identification and reporting, control methods, and monitoring.|
submitted by Joan Westfall.