4.2.3.15 geranyl diphosphate - 4.2.3.15 geranyl diphosphate induced by stem wounding, enhances resistance to insects 4.2.3.15 geranyl diphosphate the acyclic monoterpene myrcene is required for the production of the major aggregation pheromone component, ipsdienol 4.2.3.15 additional information terpenes produced from the wild-type and mutant enzymes are identical, showing low levels of beta-myrcene from AcTPS2-K514A