- Spiders
- FleasFemale weevils mine holes partway through the leaf tissue to lay eggs. These hatch into legless, white larvae that tunnel through soft leaf tissue at the leaf tips turning the tips white, then eventually brown. The bugs jump like fleas when disturbed.
- WaspsGall wasps in produce a wide range of galls, from woody, rounded galls on stems or leaves to woolly or mossy galls. Common leaf galls found in Colorado look like pale-colored balls, reddish cup-like swellings, bright-red raised areas along the veins, or woolly patches.
- FliesSome people think the tree service industry has been crying wolf about the Emerald Ash Borer (EAB) since 2013. Homeowners with mature Green, White, Black, and Blue Ash and all their cultivars should get them treated before it is too late. These trees have zero immunity to this insect. The EAB showed up in Arvada in 2020. It is just a matter of time before the insect flies to Denver or arrives inadvertently in the back of a pickup in a load of firewood. Since Denver Metro has 1.4 million Ash trees, it will be impossible to book an appointment with a plant health care company once the insect makes its presence known in Denver, so it is best to be proactive. Check out the Ross Tree EAB Handbook for more information about this pest.
- BeetlesMay 15, 2024 | Plant Health Care, Tree Health Care, Tree Insect Control, Tree Removal Time to Protect Spruce, Ponderosa, and Austrian Pine Trees Ips Beetles are native to Colorado and are now on the move in Denver. Their larvae damage spruce and pine trees, so the best time to treat is when the adult males become active in April and May each year. They...
- MothsThe leafminer creates winding, serpentine tunnels in Aspen leaves in the spring and summer. Infestations are rarely severe, but some people find their moths a nuisance.
- MitesLate winter droughts followed by dry springs create perfect conditions for turf mites in Denver. These mites cause large brown patches to appear on lawns. Lawn miticide treatments and supplemental watering will help minimize damage from these invertebrates.
- AphidsMar 5, 2024 | Plant Health Care, Tree Health Care, Tree Insect Control Each spring is different in Denver. Ross Tree’s General Manager is already seeing aphids in February 2024. Last year, Denver had a wet spring, and an Elm Leave Beetle infestation occurred. In 2022, we had a dry early spring with little snow, but it rained...
- MidgesHoneylocust Podgall Midges emerge in the spring and fly to Honeylocust trees to lay eggs on developing leave buds. The best time to treat is during egg-laying time in early spring when trees are budding.
- Boxelder Bugs
- Birds
- Woodpeckers