10 Tips on DIY Wasp Control
1. Your best bet to achieve control over wasps is to find the nest and destroy the colony.
2. Apply insecticides You may choose from the several insecticides that are effective. One percent dichlorvos (DDVP), 2% malathion, or 1% ronnel may be used. The last two are slower acting and if the material also contains pyrethrins, there will be a faster knockdown of the wasps and less chance of being stung.
3. Generally, insecticidal dusts are best for terrestrial (underground) nests and insecticidal sprays for aerial nests. Throw a shovelful of dirt over the entrance hole of an underground nest after the insecticide is applied.
4. Make sure that control measures are undertaken only at night when the wasps are less active and when all are present on or in the nest. You might as well take advantage of cold or wet weather, which will also reduce the possibility of stings.