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.
1 Farmers use chemical pesticides to eliminate insects and diseases that destroy crops and diminish food supply. 2  These compounds work very well in killing the insects that feed on the roots, leaves and stems of both food crops and garden flowers. Farmers use chemical pesticides to eliminate insects and diseases that destroy crops and diminish food supply. 2  These compounds work very well in killing the insects that feed on the roots, leaves and stems of both food crops and garden flowers.