Diseases, Pests, and Other Problems Articles Know your enemy: Battling Japanese Beetles in the Garden Japanese Beetle is Here by Mikl Brawner Rose Insects: What are they and what are they doing? Crown Gall Murder by Roundup Oh, Hail, What to do now! When Your Rose Changes Color Health in the Garden, Series I (Tetanus) Health in the Garden, Series II (Mosquitos) Colorado State University Fact Sheets Powdery Mildew Diseases of Roses in Colorado Leafcutter Bees Japanese Beetles Insect Control: Horticultural Oils Plant Talk Colorado Web Pages Aphids Powdery Mildew Rose Diseases Viruses in Plants Rose Cane Borer Rose Insects Additional Resources Baldo Villegas’ Bug Page Click here to purchase our definitive guide to growing beautiful roses in Colorado. BECOME A MEMBER Click here to join the Denver Rose Society. Join our email list for information about upcoming events. SUBSCRIBE! You have Successfully Subscribed! NEED HELP? Click here for our list of Consulting Rosarians.