Striped bark scorpion

With  the weather getting cooler, many pests may try to come inside to stay cozy through the colder months.  One of the common culprits we see in Central Texas is the striped bark scorpion.   If you discover them outside I would leave them alone. They are predators and can help cut down on some of the insects that you have in the yard. When I find them in the house, I scoop them up on a piece of paper and shuffle them back outside. If you don't quite have my love for critters with more than four legs, then you can use exclusion techniques to keep them outside where they belong.

Some ideas to keep scorpions outside include:

Striped bark scorpion.

• Remove harborage areas around the structure.  I know it's really convenient to have your firewood stacked up next to the house and back door, but that is a perfect hiding place for scorpions. They then are not only really close to the door to get in that way, but they can be carried in with the fire wood.  You also should move any piles of rocks, bricks, landscape timbers or other debris away from the house.
• Keep vegetation trimmed away from the house and the lawn mowed.
• Do not store firewood inside or if you choose to do so (like me) don't be surprised to find some critters in there on occasion.
• Make sure that weather stripping around doors and windows provides a good seal.  This will not only keep out unwanted pests, but can help reduce energy bills.
• If you have a brick or stone facade on your home, use copper mesh to block weep holes.  You don't want to seal them completely as they help air to move through wall void areas.
• Seal any cracks, crevices or pipe penetrations around the outside of the structure with sealant that will expand and contract with Texas weather conditions.
• Trim back any trees that touch or overhang the house.  Scorpions and other pests (including furry ones) can use these as a bridge to get onto the roof and from there into the attic.

If you've done all of that and are still having problems, try a pesticide residual spray around the foundation of the home.

Alfalfa weevils

Alfalfa weevil adults are about 3/16 of an inch in length, brown with a dark brown stripe down the back.  Weevils are a group of beetles that often have a long snout.  Larvae are legless, plump and yellow to green in color with a dark head. Both adults and larvae have chewing mouthparts.

Females lay eggs in the stems of alfalfa where the larvae develop throughout the spring.  Pupation takes place in the soil. There is one generation per year and the adults can survive 10-14 months.

Host plants include alfalfa, vetch and various clover.

So why am I, an urban agent, writing about what seems to be a field crop pest?  Well, these little guys and gals have been emerging from overwintering sites and making their way into homes and other structures.  I spoke with a Master Naturalist in Williamson county who said that someone brought in a bag full that was collected from the inside of a home.

If you are dealing with alfalfa weevils invading your house, work on exclusion techniques.  Some ideas include:

1. reduce outdoor lighting at night or use yellow bug bulbs
2. make sure weather stripping is in good repair around doors & windows
3. make sure screens are in good repair
4. seal any crack & crevices with sealant that will expand with temperature change we get throughout the year
5. seal any pipe/ wire penetrations

If you want, you can do an outdoor treatment with pesticide around the foundation to create a barrier.  Indoor pesticide treatments are unnecessary.  Clean up any weevils found indoors with a dustpan and broom or a vacuum.

On another note....WEBINAR INFORMATION:

If you missed the webinar on ticks from the All Bugs Good and Bad series, you can find the recording here:
https://learn.extension.org/events/1381

Next month, on the first Friday....May 2nd there will be a new webinar.  This webinar will be titled "Are Those Itsy Bitsy Spiders Good or Bad?"  The 45 minute webinar will be presented at 1PM CDT and given by Dr. Nancy Hinkle and moderated by Charles Pinkston.  The webinar will highlight good qualities of spiders and their usefulness.

Excluding Pests from Your Home

With cooler temperatures, you may often find your home invaded by unwelcome visitors. No, I'm not talking about all the relatives that come to visit for the holidays. Many insects and other arthropods will move indoors to find a more suitable habitat to spend the winter. With a few preventative techniques, you can exclude many of these critters from coming inside.

Exclusion ideas to help keep pests out of your house:

• Prune trees and shrubs so they do not touch or over hang the house or roofline.



• Do not stack firewood or other items against the house.



• Install weather stripping around loose fitting doors and windows (if you can see daylight around a door during the day then the weather stripping should be replaced).



• Block weep holes in homes with a brick or stone facade with steel wool or copper mesh (use copper on light colors since steel wool will rust if it gets wet).



• Use caulk or expanding foam to fill in cracks and crevices on the outside of the home and around pipe and wire penetrations.



• Keep window screens in good repair.



• Use stainless steel mesh wire to block access points in the attic (vents, etc.).