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.
Bonide Pyrethrin Garden Insect Spray uses the active ingredient Pyrethrins which is an organic compound derived from African Chrysanthemum flowers and can be used until the day of harvest. Use this product on plants in your lawn and garden including vegetables, fruits, ornamentals, flowers, and roses.onide Pyrethrin Garden Insect Spray is a non-selective insecticide, so it will kill all of your insect pests-honey bees included. To avoid this, apply the product at night when the bees are not active.