Japanese beetles (JP) defoliate over three hundred different species of trees and leafy shrubs, but are especially attracted to linden and rose bushes. That's just when they are adults. As grubs, they hatch in late summer and fall and are actively chewing grass roots until soil temperatures fall below 60 degrees. This can decimate root [...]
Loveland sets traps to monitor emerald ash borer Each year, for the past seven years, Loveland parks staff have placed traps in strategic areas to monitor whether the emerald ash borer has arrived in the city. Again, 10 traps were being placed Monday. The pest has not been confirmed anywhere in Larimer County, in traps [...]
Hobbyist apple growers may dream of eating backyard apples only to discover that worms have overtaken the fruit. The culprit is typically codling moth - and those worms are actually pupating larvae, aka caterpillars. Codling moth is a common fruit insect, attacking a variety of fruit trees, including apple and pear trees. The female moths [...]
Elm leaf beetles can be serious pests of elm trees throughout Colorado. These insects feed on elm leaves and cause them to dry up and die. This gives heavily infested trees an unsightly, general brown color. Repeated injuries also weaken trees and make them prone to branch dieback and wind injury. Elm leaf beetles [...]
The emerald ash borer (EAB) is a metallic green flying beetle that is known to bore into and kill ash trees it infests. With Boulder’s outbreak of emerald ash borer back in 2013, the devastating spread of infestation has caused massive numbers of ash tree deaths. Since Boulder has lost so many trees, and the State of [...]
Is your Oak tree looking sick, scraggly, droopy, or all of the above? It could be due to the insect Kermes scale. What's that? Kermes scale is an insect pest of red and white oak trees, as well as the pin and Gambrel oaks. Northern Red Oaks often become infested with the Kermes scale, in particular, [...]
May Colorado Insect checklist of some common insect-related events – Denver metro and Boulder, Denver South and East This is a generalized checklist of when some of the more important insect-related events tend to occur in our area. Year to year variations are considerable - this should be used as a guideline to anticipate and help recognize [...]
April Colorado Insect checklist of some common insect-related events – Denver metro and Boulder, Denver South and East This is a generalized checklist of when some of the more important insect related events tend to occur in our area. Year to year variations are considerable - this should be used as a guideline to anticipate and help recognize common insect [...]
March Colorado Insect checklist of some common insect-related events – Denver metro and Boulder, Denver South and East This is a generalized checklist of when some of the more important insect related events tend to occur in our area. Year to year variations are considerable - this should be used as a guideline to anticipate and help recognize common insect [...]