Spot sprayer replaces team of weeders 06-08 | Smart farming | Article James and his son Joshua Martin assess the spot sprayer’s weed control results in their onions. Photos: Martijn KnuiversArable farm Martin & Sons in Wisbech, England, invested in a spot sprayer. This is a British-made spot sprayer from Techneat Engineering, which works with advanced camera recognition technology from Tillage & Hage. Spot sprayer costs £75,000The spot sprayer has a gross price of £75,000. The spot sprayer works faster and is cheaper per hectare.