Below are some common issues encountered in lawns and among foliage. Click or tap any photo for a larger view.
Image credits (CC BY 3.0 license):
Armyworm, #1320022: USDA ARS Photo Unit , USDA Agricultural Research Service, Bugwood.org
Chinch bugs, #5592628: Clarissa Balbalian, Mississippi State University, Bugwood.org
Take-all patch, #5359699: William M. Brown Jr., Bugwood.org