PENGARUH WARNA PERANGKAP FEROMON TERHADAP HASIL TANGKAPAN IMAGO Oryctes rhinoceros DI PERKEBUNAN KELAPA SAWIT = THE EFFECT OF PHEROMONE-TRAP COLOR ON CATCHED YIELD OF Oryctes rhinoceros ADULT IN OIL-PALM ESTATE - Perpustakaan UGM, i-lib ([Yogyakarta] : Universitas Gadjah Mada, 2008)