If its a pesticide i doubt it would harm your plants but not sure you would want any pesticide on them anytime close to harvest if it is dusted before flowering begins dont really see it being a problem but growing on the edge of a field is a good idea if your not sure about when the field may be harvested.
planes can be used to spread fertilize or weed killer or even pesticide if your not for sure what they are spraying you may be better off finding a different spot.