New York Natural Heritage Program
Three-banded Lady Beetle
Coccinella trifasciata Linnaeus, 1758
Insects

Threats [-]
Agricultural land has been declining in New York since the 1880s resulting is less suitable habitat for lady beetles. Between 1940 and 1997, there was a 57% decline in farmed land in New York (Harmon et al. 2007). Non-native lady beetles are predators of C. trifasciata. In addition, non-native lady beetles are likely outcompeting C. trifasciata for resources. There are several other known pathogens and parasites of Coccinellidae (Graves 2013). Lady beetles appear to be sensitive to pesticide use (Stephens and Losey 2003).

Conservation Strategies and Management Practices [-]
Preservation of farmland would maintain or increase suitable open habitat. Pesticide use should be avoided when possible. If pesticide use cannot be avoided: use chemicals that target only the pest, treat only infested area, and select chemicals that do not persist.

Research Needs [-]
Additional research is needed to determine the effects of competition with other coccinellids, habitat needs, and lab rearing and reintroduction techniques.