Control Wasps With Natural Insecticide
For control of wasps and hornets that build aerial nests near windows eaves, in trees, etc. insecticides are formulated in pressurized containers that emit a narrow, 15 to 20 foot spray. Insecticide products using mint as the active ingredient will produce almost instant knockdown for wasps hit. By approaching a hornet nest, spraying in the sweeping motion, the area can be cleared of guards at the nest, followed by directing the spray stream into the entrance of the hole at the nest bottom to kill those inside. During the day, this technique does not alarm other hornets returning from the field. No other insecticide needs to be introduced in the nest since all adults present are killed and the immature stages (eggs and larvae) die from lack of care. Usually after one to two days, the nest can be removed carefully. Umbrella or paper wasp nests are easier to treat.
For information go to Yardener's Tool Shed and check out the section on Natural Insecticides to Kill Hornets or Wasps
Control Wasps With Synthetic Insecticide
There are wasp freeze or wasp stopper compounds, containing highly volatile solvents mixed with resmethrin, pyrethrins or some of the newer pyrethroids that cause almost instant knockdown for wasps hit.
Use the same technique described above.
For information go to Yardener's Tool Shed and check out the section on Synthetic Insecticides to Control Wasps and Hornets