Cinchona pubescens In the second trial, a picloram and metsulfuron solution was 100% successful in concentrations greater than 4% solution. In the third trial, picloram- metsulfuron solution of 10% concentrations or higher was successful in eradicating the tree. Cinchona pubescens Cinchona pubescens, also known as red cinchona and quina (Quechua) ( "Cascarilla, cinchona"; "quina-do-amazonas, quineira"), is native to Central and South America. It is known as a medicinal plant for its bark's high quinine content- and has similar uses to "Cinchona officinalis" in the production of quinine, most famously used for treatment of malaria. "C. pubescens" varies from small to large in
Bark hack Bark hack A bark hack is a tool used to remove pine tree bark to promote the flow of pine resin, which is used in naval stores production. The tool consists of a wooden shaft with a weighted butt and hook-like, replaceable, U-shaped blades at the head. The bark hack is swung much like an axe and is used to create a hatched chevron pattern ("cat face" or less frequently, a "blaze") into trees' exposed sapwood. The weighted end helps the operator follow through with the force necessary for the hooked blade to scoop out chips of hard pine wood.