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Keyword: nontarget effects

Indirect nontarget effects of host-specific biological control agents: Implications for biological control

Publications Posted on: December 14, 2015
Classical biological control of weeds currently operates under the assumption that biological control agents are safe (i.e., low risk) if they do not directly attack nontarget species. However, recent studies indicate that even highly host-specific biological control agents can impact nontarget species through indirect effects. This finding has profound implications for biological control.

Indirect effects of host-specific biological control agents

Publications Posted on: December 14, 2015
Biological control is a crucial tool in the battle against biological invasions, but biocontrol agents can have a deleterious impact on native species. Recognition of risks associated with host shifting has increased the emphasis on host specificity of biocontrol agents for invasive weeds.

Effects of biological control agents and exotic plant invasion on deer mouse populations

Publications Posted on: April 21, 2015
Exotic insects are commonly introduced as biological control agents to reduce densities of invasive exotic plants. Although current biocontrol programs for weeds take precautions to minimize ecological risks, little attention is paid to the potential nontarget effects of introduced food subsidies on native consumers. Previous research demonstrated that two gall flies (Urophora affinis and U.

Effects of picloram application on community dominants vary with initial levels of spotted knapweed (Centaurea stoebe) invasion

Publications Posted on: December 06, 2010
Broadleaf herbicides are commonly used to suppress exotic weeds with the intent of releasing native species from negative impacts of invasion. However, weed control measures can also have unintended consequences that should be considered along with intended effects.

Weed biocontrol insects reduce native plant recruitment through second-order apparent competition

Publications Posted on: September 02, 2008
Small-mammal seed predation is an important force structuring native-plant communities that may also influence exotic-plant invasions. In the intermountain West, deer mice (Peromyscus maniculatus) are prominent predators of native-plant seeds, but they avoid consuming seeds of certain widespread invasives like spotted knapweed (Centaurea maculosa). These mice also consume the biological-control insects Urophora spp.

Effects of two prairie dog rodenticides on ground-dwelling invertebrates in western South Dakota

Publications Posted on: May 15, 2006
Immediate and long-term effects of 3 rodenticide treatments on nontarget invertebrates were evaluated on prairie dog colonies. Immediate impacts indicated zinc phosphide reduced ants, strychnine alone reduced wolf spiders, and prebaited strychnine had no impacts. Long-term changes showed increases in wolf spiders and ground beetles and densities were contributed to biotic and abiotic habitat alterations due to lack of prairie dog activities.