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How To Control CaddisfliesCaddisfly

If you’ve taken a swim in a pond or a lake, you may have noticed a winged insect that swarms in huge numbers that looks similar to a moth. That insect is a caddisfly. While these insects mainly like to hang around bodies of water, they may wander off and end up in homes where they can be a troublesome pest especially when they swarm in large numbers. These insects are heavily attracted to light and may have wandered away from their aquatic habitat by the lure of a light.

If you have a caddisfly issue in or around your home, there is a way to get rid of them and we here at Solutions Pest and Lawn can tell you how to handle them and what the best products are for caddisfly control.



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Caddisfly Background Information

The Caddisfly is an aquatic insect which belongs to the Trichoptera order and share similarities with moths and butterflies. There are at least 7,000 species of caddisfly found across the world and 1,100 of them are found in the U.S. alone. Even though they are an aquatic insect, they can also live and thrive on land. They are also known by other names such as sedge, shadfly and periwinkle.


Caddisfly adults are long, slender, and vary between being ¼  to 1 inch long. They have two pairs of wings that are held “roof-like” over their body when they are resting. The also have long antennae which are nearly as long as their entire bodies. Most caddisflies are a dull-colored browned but certain species are brightly colored.


During the larvae stage, caddisflies are aquatic, spending most of their time around bodies of water such as  streams, rivers, lakes, ponds. Caddisflies complete four developmental stages – egg, larva, pupa and adult. The larval stage lasts 1-2 years; the pupal stage lasts around 2-3 weeks; and adults emerge from their water habitat and fly away in large swarms.


While the adults may venture out away from water but most of the time they make sure to keep close to a water source and try not to stray too far. Adults live less than 30 days, but before they die, they mate and the adult female lays her eggs in or near the water.


Caddisflies diet mainly consists of feeding on decaying aquatic plant debris and algae in their immature stages. Some species of caddisfly in this larvae stage may even prey on aquatic organisms. Adults on the other hand, do not feed. Their primary purpose during their short life span is mating and laying eggs by the females.


Adult caddisflies become a pest problem for humans when they enter homes which they usually enter into because they are attracted to light coming from the home. They have a tendency to intrude upon homes and land on walls and other surfaces usually in very large numbers and thus, control measures are important to remove them from the home.


Tips on Dealing with Caddisflies


Adult caddisflies as they only live for a short time before dying off in large numbers. If caddisflies have set up camp in or around your home, your best bet would be to wait out the swarm and let them die off on their own. There are ways, however, to discourage caddisflies hanging around near your home.


  • Reduce or change the lighting: caddisflies have an affinity for bright and especially white light. If you live in an area prone to infestations, we recommended managing light as much as possible around your home around night time or replacing white lights with yellow diffused bug light bulbs or light made from high-pressure sodium vapor. 
  • You should also do what you can to reduce the amount of light that escape through windows by closing curtains and your shutters tightly.
  • Reduce standing water as much as you can around your home. If you have a pool, keep it covered at night. caddisflies will flock to wherever water is to drop their eggs.
  • The use of a heavy-duty vacuum is a good way to suck up caddisflies which have gathered around your home. Make sure to use a disposable vacuum bag and replace it immediately.



Solutions Recommended Products for Caddisfly Control


If you have a large swarm of caddisflies near your home or lakeside where you are residing, we recommend using a spray like Essentria IC3 Natural Pesticide. Essentria has a quick contact kill and can be sprayed freely without worry about harming any other aquatic life. Spray Essentria around bushes, trees, your lawns walkways and banisters and all around the lights they tend to gather at.


If your caddisfly activity is in a place where there aren’t bodies of water, we recommend using a product like Talstar Pro instead. This product will do a great job and will dry clear on the surfaces you treat, however the Essentria because it is all natural, will have a stronger odor of peppermint/spearmint when you do the application and may linger for a few hours after treatment. Talstar, on the other hand, is odorless.


Browse our caddisfly control products below. For more information or to get any questions or concerns address, chat with us online or call our customer service line and we’ll help you right away.

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