Casting a light on IPM

Suncor Energy Inc. has developed photosensitizer formulations that cause high mortality rates in common greenhouse pests. These novel, photodynamic insecticides are non-toxic derivates of natural compounds that fit into an ecosystems-approach of growing food more sustainably. Photosensitizers are inactive when applied to the target insect and only enter an excited state when activated by natural or artificial light, such as LEDs. Activated photosensitizers produce reactive oxygen species that lead to the death of the target pest. Photodynamic insecticides have proven to be as effective as registered synthetic chemical pesticides. In trials conducted at Vineland Research and Innovation Centre, mortality rates above 70% were observed when photosensitizers were sprayed to control western flower thrips. Mortality rates increased to above 80% when the photosensitizer formulations were combined with Suncor’s registered oil product, PureSpray Green. Photosensitizers can be applied with equipment currently used in greenhouses and in the field. Due to their unique mode of action the products degrade after light exposure, thereby minimizing the risk of buildup of toxicity or resistance. These photosensitizer formulations are non-toxic to pollinators and pose much lower risk to human health than any registered synthetic chemicals. Additionally, but critically important, Suncor’s photodynamic insecticides can likely be used with bios as part of existing IPM programs.