The Insects of October
Fruit flies - Flies develop in overripe fruit
and become abundant in homes.
Wasps and hornets - Abandon nests at the end
of the season. Workers are killed with cold weather and only females overwinter.
Boxelder bugs - Invasions of homes accelerate
with cool weather. Massing of bugs occurs on south-facing sides of buildings on warm,
sunny fall days.
Hackberry blistergall psyllids - Adults move into homes and to shelter of
other overwintering sites.
Aphids on trees - Overwintering eggs are laid as
long as weather permits.
Poplar twiggall fly - Galls
become obvious as aspen leaves fall.
Oak bulletgall wasp - Adults begin to emerge in late month.
Needle drop of pines - Not insect-related, pines naturally shed old
needles in fall.
Information provided courtesty of Whitney Cranshaw, Department of Bioagricultural Sciences
and Pest Management, Colorado State University.
