spider eggs


We recently had our roof replaced and it now has ridge vents which require soffet vents for proper ventilation.  I am installing soffet vents but my wife is very concerned about the entry of spiders.  I am using good quality vents (they are rigid so their edges do not bow between the fasteners) and I am using a generous amount of caulk between the vent and the soffet.  Will spiders lay their eggs on the screen and result in a new generation of spiders getting into the attict.

Thank you for your time and response.

Sealing cracks and crevices will no doubt help to keep out unwanted pests. But there are so many ways these unwanted visitors can get in I'm not convinced this is a viable way to do effective pest control. In fact, we in the pest control industry refer to such effort as a type of "mechanical control". In many situations there can be a good amount of mechanical control needed in order to solve a particular problem. But based on the situation described in  your message, I'm not sure there is any reason to believe your work will either increase or decrease the amount of spiders on your home.

That being said, we all know spiders are mostly predatory pests. And as such are likely to move on when food is limited. Which is why in our SPIDER CONTROL ARTICLE we explain that treating the home on a regular basis will many times keep both perimeter invading pests away as well as predatory pests. So if you aren't yet doing some outside perimeter pest control, now would be a good time to start.

Basically treating your soffits, foundation and around other points of entry will no doubt cut down the chance of anything hanging around or entering the home. And spraying roof vents, soffit vents, downspouts, around windows and doorways will also help. A good product to use for this work is the DELTAMETHRIN featured in our article. Treatments will last 2-3 months and it works on a wide range of pests.

Alternatively you can go with an organic solution like the NBS INSECT REPELLENT. It won't kill a thing but insects don't like it and tend to avoid where it's been applied. NBS can also be added to paint and stain and if you had asked about what to use prior to doing all the work you listed in your question, I would have told you to add it to your paint and you'd be covered.

Here are direct links to the products and information listed above:

Spider Control:  http://www.brownrecluse.com/brown-recluse-spider-control/spiders-outside

Deltamethrin:  http://www.bugspraycart.com/insecticide/liquid/suspend-sc

NBS:  http://www.bugspraycart.com/exempt/additive/nbs-paint-additive-16-oz

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Dear Sir,

I pressure wash homes for a living and I have one home in particular that has a really bad spider problem. The real problem for me isn't the spiderwebs but instead it is some kind of jellied snot balls on the walls that will not come off easily by pressure washing alone. They can be pulled off easily by hand but not by cleaners and pressure washing. I have tried a multitude of products with no real success. First, are these little balls of jelly from the spiders? Second, what will make the turn loose? Any help would be greatly appreciated.


I'm not sure what it is that you are finding on this home. Spider eggs are usually small, round and slightly smaller than a marble. Generally they are quite dry, even outside, and normally do not take on the characteristics you describe. But there are several other insects which will "nest" on homes. These nests are more likely pupae casings and the more common insects that use homes for this include bagworms and all kinds of moths. Larvae from these insects will leave where they were born and travel to a good "roosting" site where they spin a cocoon and undergo metamorphisis. Have you tried opening up any of these jellied snot balls? My guess is they will harbor some kind of molting insect which is using the structure instead of nearby trees or other natural structure on which to go through this stage of development.

To help deal with the issue, there are two things you should consider. One would be a good tool to remove the sacs and the other involves some sprays to help prevent the invasive pest from returning.

To help take down the sacs, I suggest getting a SPIDER WEB REMOVING TOOL. You can get this configured in several lengths including the one that will reach over 30 feet high. This would help remove spider webs along with these annoying "snot balls". It's definitely handy and should eliminate the need for using a ladder most of the time.

To prevent the jellied snot balls from returning, treat the house with WEB OUT. Though formulated with spiders in mind, this totally "organic" spray will repel spiders and other insects from the structure. Use it quarterly and you should be able to keep larvae stages off the building thus avoiding the jellied snot balls (most likely pupae cases) altogether.

If you find the Cobweb Eliminator isn't strong enough, treat with the EXEMPT ECO IC or BIFEN. The Exempt does not require an EPA number so it's not a real pesticide; the Bifen would be the strongest option here and should provide 2-3 months of protection from any pest that would forage onto the structure. By treating the sides of the home with the Bifen, you should be able to stop any pest from foraging onto it so no new nests would develop.

If you have further questions, please give us a call at 1-800-877-7290 and someone in technical support should be able to further advise.

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