Abstract: This invention is directed to a bio-carrier which is non-toxic to most biological agents, will suspend various agents for increased uniformity of delivery, has adjustable adhesive properties which simulates nature, has variability in its adhesives and suspension qualities, it decreases control agent mortality, and it enhances overall effectiveness by allowing more live control agent to reach the target. It does so by depositing, adhering and maintaining the control agent in the active use zone of the target crop.

Abstract: This invention relates to a power drive unit which is attachable to, and detachable from, a conventional wheelchair. Thus, a conventional manually-powered wheelchair can be converted into a power driven wheelchair employing the subject apparatus for driving and directing the movement of a manually-driven wheelchair having a plurality of wheels riding on an underlying surface. The subject apparatus comprises a drive and steering wheel which rides on the underlying surface for driving and for directing the path of operation of the wheelchair, as well as for powering the drive wheel. The apparatus is attachable to, and detachable from the wheelchair and is located rearwardly of the wheelchair so that the weight on the drive and steering wheel will substantially only be the weight of the apparatus. On the other hand, the weight of a person sitting in the wheelchair will be substantially the only weight imparted to the wheelchair wheels.