NOVELTY - Medicament comprises 20-25 wt.% plant ash, 3-8 wt.% tobacco silk, 10-15 wt.% tea seed, 7-12 wt.% coal ash, 10-15 wt.% radix sophorae flavescentis, 12-15 wt.% chaulmoogra, 8-10 wt.% Sophora alopecuroides, 8-10 wt.% Phellodendron, and 5-10 wt.% pepper powder, and impurity (balance).    USE - The medicament is used for preventing and treating coconut core Chrysomelidae (claimed).    ADVANTAGE - The method is economical, has simple operation process, and avoids environmental pollution. The medicament can achieve the purpose of control of Chrysomelidae damage to palmaceous plant.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing medicament comprising (i) taking chaulmoogra, Sophora alopecuroides, drying, roasting, frying and baking, after baking method, fully drying, smashing and grinding to powder and storing in storage for future use, (ii) taking radix sophorae flavescentis, adding in steaming drawer and steaming for 1-2 hours, drying, cutting into 2 cm small sections, adding in coarse sand pan, frying until golden color, sieving, removing sand, smashing, grinding to powder and storing, (iii) crushing Phellodendron, placing into a container, adding tung oil until Phellodendron powder is submerged, soaking for 24-48 hours, (iv) passing plant ash and coal through 50-80-mesh sieve and storing for future use, (v) smashing wild pepper seed to powder and storing for future use, (vi) taking tobacco leaf, cutting tobacco silk and storing for future use, (vii) smashing tea seed and storing for future use, and (viii) taking plant ash, tobacco silk, tea seed, coal ash, radix sophorae flavescentis, chaulmoogra, Sophora alopecuroides, Phellodendron, and pepper powder, loading in water vapor permeable bag; and (2) use method of the medicament comprising fixing medicament package above core leaf root of palmaceous plant, using the smell of traditional Chinese medicine pack to drive coconut core Chrysomelidae, absorbing air moisture in bag, during tree maintenance time, pouring water and rain water to make medicament flow to kill coconut core Chrysomelidae eggs and larvae.