New York Natural Heritage Program
Checkered White
Pontia protodice (Boisduval and Le Conte, [1830])

Threats [-]
Checkered white populations may have declined because of the introduction of a parasitoid wasp, Cotesia glomerata that was released to control cabbage white populations. The wasp also attacks other pierine butterflies (Schweitzer et al. 2011). Development and railroad and road maintenance are also threats as this species has been found in areas with such pressure in New York.

Conservation Strategies and Management Practices [-]
This species often occurs along roadsides and railroads. Maintenance in these areas should be done to reduce the impact to the species. Broadcast use of herbicides should be avoided. Instead, it has been recommended that herbicides be applied to specific target species (Schweitzer et al. 2011).