Controlling those pesky mosquitoes

Q: This year, for some reason, we cannot sit outside for even a few minutes without being bitten up by mosquitoes. We have to spray bug repellent all over our skin just to sit outdoors in the evening, and even then we can see dozens of the little buggers swarming around the patio lights. Can you give us any ideas to clear up this problem, without resorting to chemical sprays? — Lucy G., Newton, Mass.

A: A warm, wet spring can spawn a huge mosquito population. Summertime is high season for these little critters, as you’ve noticed from the swarms around your patio.

The large number of mosquitoes is of special concern due to the increased possibility of mosquito-borne illnesses — like West Nile Virus and equine encephalitis — being contracted by humans. So taking steps to reduce the number of mosquitoes in your yard, and to prevent being bitten by them, is very important.

The best way to accomplish this is to eliminate as many sources of standing water from your yard and home exterior as possible. One cup of water can provide enough space to incubate hundreds of mosquito eggs. Here is a short list of things to do:

• Clean gutters, eliminating any debris dams that keep water from draining.

• Make sure the downspouts drain well away from the house, and that water continues to flow freely away and out of the yard.

• Clean up any piles of leaves, trash, branches, old tires or other junk where rainwater can pool.

• Turn over wheelbarrows, buckets or other containers.

• Store tarps, gardening tools, lawnmowers, etc., when not in use.

• If your pets’ drinking water is outside, change the water daily and scrub the bowls to dislodge insect eggs.

• Add an aerator to outdoor ponds or water gardens, or add fish that will eat mosquitoes and their larvae.

• Note “wet” or “soft” spots in the yard where water drainage is poor; consult an expert on improving drainage from the area.

• If you collect rainwater to use in your garden, keep the rain barrel covered. (Covered rain barrels are available for purchase. Start at www.rainbarrelguide.com to learn more.)