Grants.gov - find and apply for federal government grants

EPA Grants and Partnerships EPA funding supports grants in several pesticide related areas
strategic agricultural initiative,  tribal pesticide projects,  urban initiative 

USDA/CSREES Pest Management Alternatives - Supports projects that help farmers respond to the environmental and regulatory issues confronting agriculture.

USDA/CSREES Funding Opportunities - Many grants and not all pest related.

Western Region IPM Centers - Many funding opportunities in the area of pest management and IPM