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 Bay leaves repel pantry insects. 2  Place the leaves inside canisters and cupboards. 3  When you bring dry goods home from the store, place them in a plastic bag in the freezer for one week to kill any eggs. 4  If you have space, you can use the freezer for long term storage. Wipe shelves, food containers, and other surfaces with white vinegar. 2  For added protection, use a few drops of essential oil like peppermint, citronella, eucalyptus, or tea tree. 3  To prevent infestation, store foods in airtight glass, metal, or plastic containers. 4  Bay leaves repel pantry insects.