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.
It's an organic way to save time and money while making your garden more beautiful. I don't like to spend much time in the kitchen, but that's where I found all these kitchen-cupboard remedies for pest control, says Marianne Binetti. For example, all too often the slugs in her garden take over her flowers.