In such cases the weeps consist of small-diameter plastic, clay or metal pipes extending through the wall to a layer of porous backfill. Typically, weeps are arranged to direct water which may have entered an assembly from outside back to the outside.
A few of several safe household chemicals to use are vinegar, dishwashing soap and rubbing alcohol, according to an Oregon State University Extension Service publication called Using Home Remedies to Control Garden Pests, (EC 1586). The publication, complete with photos, is available free of charge online.
Home remedies donât discriminate -- they are as deadly to beneficial insects as they are to pests. Avoid exposing bees, spiders, ladybugs and ants to homemade pesticides products. Make only as much home remedy pest control material as needed for a single application. Use it right away and discard any unused portions.