Grazing, herbicidal spraying, and biocontrols have been implemented in many of the 
areas. 
• Database of Invasive Plant Mapping Data, Nevada Natural Heritage Program. 
Nevada Natural Heritage Program, in cooperation with the Nevada Department of 
Agriculture, is creating a database management and mapping position to keep track of all 
of Nevada’s Invasive Plant Mapping Data, including aquatic plants. The data will be 
gathered by CWMAs and various agencies and organizations. 
A.29.3. CLIMATE CHANGE CONCERNS 
• Although weevils have effectively defoliated the tamarisk trees numerous times, they do 
not do well in southern Nevada. This may be linked to temperature, since weevils may 
be heat-sensitive. Researchers may try to obtain more heat-tolerant weevils from their 
source location. 
• Climate change could increase demand on water resources, and because invasive species 
(such as tamarisk) deplete the water supply, invasive species could become a greater 
problem as a result of climate change. 
A.29.4. CLIMATE CHANGE ACTIONS 
(None reported.) 
A.29.5. RESEARCH ACTIVITIES AND INFORMATION USED 
(None reported.) 
A.29.6. RESEARCH NEEDS 
• Cooperative Extension education and outreach need to be developed. 
• A tamarisk-eating weevil that is effective in the south need to be identified. 
• More effective herbicides for treating tall whitetop and tamarisk need to be developed. 
• More information about the effect of chemicals on non-target species such as 
macroinvertebrates and their recovery needs to be gathered. 
• More research on other biocontrols for invasive species needs to be conducted. 
A-76 
