Good Agricultural Practice in Coffee Field . Do you know why broca trap and shade tree is a Good Agricultural Practice in coffee field? Broca trap will trap Coffee Berry Borer Hypothenemus hampei . Coffee Berry Borer (CBB) alias Broca fly into the broca trap because of attractant inside the transparant cage. Attractant is chemical liquid subtance. The subtance attracts CBB to come near and nearer, and finally CBB will be trapped inside the trap and cannot go out from the cage. For the best effectiveness or the best result, one hectare needs 22-25 traps. The traps are hung at 1.25 m above above soil surface. By reducing CBB infection, coffee production per plant and per hectare will increase. Shade trees will create micro climate that is favour not only for coffee plant but also for life of birds. Good Agriculture Practice in Coffee Field by using shade tree and broca trap in Mr. Lamhot Padang's coffee field in Pakpak Bharat Regency, North Sumatera,