October 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, and this should be used as a guideline to anticipate and help recognize common insect occurrences.
Household/Miscellaneous
Fruit flies: Flies develop in overripe fruit and become abundant in homes.
Wasps and hornets: Nests are abandoned at the end of the season.
Boxelder bugs, conifer seed bugs, multicolored
Asian lady beetles: Invasions of homes accelerates with cool weather. Massing bugs occur on building sides during warm, sunny days.
Hackberry blistergall psyllids: Adults move into homes and to shelter of other overwintering sites.
Spiders, crickets: Movements into homes accelerate greatly with cool weather.
Tree/Shrub Insects
Aphids on trees: Overwintering eggs are laid as long as weather permits.
Poplar twiggall fly: Galls become obvious when aspen leaves fall.
Oak bulletgall wasp: Adults begin to emerge late in month.
Needle drop of pines: Pines naturally begin shed of third year needles in fall.
Lawns
Cranberry girdler: Damage to lawns by this sod webworm occurs in the fall.
Clover mites: Egg hatch follows cold weather and mites begin to develop on grasses and weeds around foundations.
Household/Miscellaneous
Vinegar flies/Fruit flies: Flies develop in overripe fruit and may become abundant in homes.
Wasps and hornets: Nests are abandoned at the end of the season.
Boxelder bugs, conifer seed bugs: Invasions of homes accelerates with cool weather. Massing bugs occur on building sides during warm, sunny days.
Multicolored Asian lady beetle, lacewings, root weevils: Invasions of homes occurs by insects looking for overwintering shelter.
Hackberry blistergall psyllids: Adults move into homes and to shelter of other overwintering sites.
Spiders, crickets: Movements into homes accelerate greatly with cool weather.
Tree/Shrub Insects
Aphids on trees: Overwintering eggs are laid as long as weather permits.
Poplar twiggall fly: Galls become obvious when aspen leaves fall.
Needle drop of pines: Pines naturally begin shed of third year needles in fall.
Kermes scale: Typical period of crawler emergence
Lawns
Cranberry girdler: Damage to lawns by this sod webworm occurs in the fall.
Clover mites: Egg hatch follows cold weather and mites begin to develop on grasses and weeds around foundations.
Watch an intriguing video of ArborKong tree removal. Did you say Fast? Yes, it is…
As of April 24th, ArborScape Inc. is proud to announce the first graduates of our…
We start learning about the importance of trees before we are in grade school. Trees…
Do emerald ash borer die in winter? This is a good question as it gets…
This website uses cookies.