Dust such as Sevin Dust can move with the wind if it is applied very heavily or to very dry areas. We do not think there would be concern about being on the deck above where the product has been used. If you wet the area with a hose or watering can, then the dust will break down more quickly and be absorbed into the ground.
The Seven Dust 5% is not labeled to be watered after application. The label does state that if applied to home lawns, apply after rain or watering and do not water for at least 2 days after application.
Sevin Dust 5% can be applied to the leaf surfaces lightly.
Sevin Dust 5% is best applied to dry areas with no rain or watering the area 2 days after application. You should reapply if rain occured within that time.
The harvest time after applying Sevin Dust for pinkeye purple hull is 21 days.
Sevin Dust is for outdoor use only and is not labeled for scabies. Scabies mites only live on/in the skin and we do not carry anything to treat humans. Most folks need to visit their doctor to receive the medication needed to get rid of scabies. You may spray your furniture with a product such as Steri-Fab to kill anything on furniture, though treating the home is usually not necessary.
Per the product label for Sevin Dust, you should apply a thin, even film of dust to plant surfaces. Do not reapply more than once a week. If there is still a heavy dust application after several days, then you may rinse the plants to remove excess dust to prevent phytoxicity or other sensitivity. Be sure to follow the label for pre-harvest intervals and maximum number of applications per year.