Populations of spring caterpillars, cranberry fruitworm, and Southern Red Mite are also reduced. In Washington State, Dr. Kim Patten has long struggled with new chemical alternatives for weed control. Patten has recently been testing a new injection system for weed control using a fifty milliliter syringe with an udder needle manufactured for mastitis control in dairy cows. According to Majek, most of the herbicides being tested in cranberries for future registration have residual activity. You've got to be able to apply a known gallonage of spray solution per acre uniformly over the parts of the bog you intend to treat.
Hand held units can do it.
However, it takes a disciplined applicator. Majek explains that all research applications are made with a hand held unit. They are generally accurate to about one percent error or less. It wouldn't be hard to motorize it in some simple way, but the key is that it has got to be able to maintain a constant speed. A typical boom on a bicycle sprayer is 10 feet.