Mosquito Populations Rise in Kansas This Fall
Cooler weather and recent rains have allowed multiple mosquito generations to persist into the fall season across the state.
Updated on Nov. 4, 2026 in Current Conditions
Live Poll
Have you removed standing water around your home to reduce mosquitoes this fall?
Mosquito populations have risen this fall in Kansas, with multiple generations present as cooler temperatures let adult mosquitoes live longer. Recent rains have left abundant stagnant water that supports larval development.
Why it matters
Adult mosquitoes surviving longer in cooler weather can extend the period residents face biting insects and potential disease exposure. Understanding the causes helps residents target breeding sites before populations build further.
Mosquito development takes 7-14 days from egg to adult, and Btk-based dunks and bits control larvae for one to four weeks after application. The extension guidance does not provide a count of current mosquito populations or a comparison with prior fall seasons.
The players
Kansas State University Research and Extension
The state land-grant university whose extension system provides mosquito control guidance to Kansas residents through local extension agents.
The details
Multiple generations of mosquitoes are present this fall because cooler temperatures extend adult lifespan. Recent rains created stagnant water in containers and low areas where larvae develop. Residents can remove standing water from bird baths, old tires, and wheelbarrows, and use mosquito dunks or bits containing Bacillus thuringiensis subspecies kurstaki (Btk), which are harmless to pets and fish.
Timeline
Fall 2026: Mosquito population uptick and resident questions reported across Kansas.
Seasonal Patterns
The Kansas State University Research and Extension Cottonwood District extension service provides the source reduction and larval control guidance that residents are being directed to use this fall. The current increase reflects the seasonal pattern of cooler temperatures extending adult mosquito lifespan after recent rains.
Remove standing water from bird baths, old tires, and wheelbarrows around your home to reduce mosquito breeding sites. Consider placing mosquito dunks or bits containing Btk in water that cannot be emptied, which control larvae for one to four weeks and are harmless to pets and fish.
The takeaway
Eliminating standing water is the most effective step residents can take against mosquitoes this fall. Checking containers and low spots after rain helps prevent larvae from maturing into adults.
Further reading
For broader seasonal context, see Current Conditions for Kansas.
More information
Contact Kansas State University Research and Extension at aboor@ksu.edu for guidance on mosquito control.
Source note: This article includes information reported by Great Bend Post.
Live Poll
Have you removed standing water around your home to reduce mosquitoes this fall?
