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Welcome to the CSU Extension Office in Douglas County. Our goal is to assist you with any questions you may have whether it is about gardening, wildlife, 4-H or any other needs.

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Japanese Beetle Plant Damage Lists

The plants on this list are based on observations submitted by members of the gardening public during the 2021 growing season. Some plants may be listed under more than one damage level; this is intentional, since beetle feeding can be influenced by surrounding plants and environmental factors. Want to report observations? Click here. You’ll need the botanic name of your plants and about one minute!

 

Colorado State University Fact Sheets 

Gardening Basics iconGardening Basics
Soil Amendment, Container Gardening, Growing from Seed, Houseplant Care, Landscaping, and Xeriscaping.

Flowers icon

Flowers
Perennial and Annual Gardening, Rock Gardens, Roses, Bulbs, Mountain and Wild Flowers, Edible Flowers.
Fruits and Vegetables iconFruits and Vegetables
Fertilizing Gardens and Trees, Storing Produce, Currants, Gooseberries and Jostaberries, Saving and Storing Seeds.
Trees and Shrubs iconTrees & Shrubs
Native Trees and Shrubs, Diseases, Fruit Trees, Evergreen and Deciduous Trees and Shrubs.
Yard iconYard
Ground Covers, Lawns, Ornamental Grasses, Irrigation, Sustainable Landscaping and Composting.
Insects iconInsects
Household, Yard, Fruit, Flower and Garden Insects. Includes information about beneficial insects and general insect control.