Susceptibility and Resistant of Difference Host Varieties of Oil Palm and Coconut Palm Towards Pest, Rhinoceros Beetle (Oryctes Rhinoceros)

In the current study, population dynamics of males, females, and total males and females of Rhinoceros Beetle (Oryctes rhinoceros), namely, DXP PPNJ 1 and DXP PPNJ 2, was evaluated in different host varieties of oil palms and coconut palms of Ladang Penyelidikan Segamat in Johor State of Malaysia. Ethyl 4-methyloctanote had been used as a pheromone aggregation in this study. The results clearly indicated that population dynamics of Oryctes Rhinoceros (total male and female) in oil palms and coconut palms has significant difference within the whole sampling period. Based on cumulative Oryctes Rhinoceros caught, varieties of DXP PPNJ 1 and DXP PPNJ 2 had significant effects on its male and female population. MYD inclined more towards the population of Oryctes Rhinoceros male, female and total male and female, giving more impacts, when ccompared with MRD and Tagnanan. Both crops of same species/family were not recommended for planting in that area, because it facees similar problems of direct Oryctes Rhinoceros attacks, obviously affecting the yield. Therefore, MRD and Tagnanan, considered to be a cross-variety, had been recommended to farmers. Instead of having higher yields, farmers have lesser chances of severe attacks by Oryctes Rhinoceros, within the same time period.

本研究针对马来西亚柔佛州昔加末研究园（Ladang Penyelidikan Segamat）内不同寄主品种的油棕与椰子棕榈，评估了椰蛀犀金龟（Rhinoceros Beetle，*Oryctes rhinoceros*）雄虫、雌虫及总种群（雄雌合计）的种群动态，供试种群分为DXP PPNJ 1与DXP PPNJ 2两组。本研究采用4-甲基辛酸乙酯作为聚集信息素。研究结果明确显示，在整个采样周期内，油棕与椰子棕榈上的椰蛀犀金龟总种群（雄雌合计）的种群动态存在显著差异。基于累计捕获的椰蛀犀金龟数量，DXP PPNJ 1与DXP PPNJ 2两个品种对其雄虫、雌虫种群均存在显著影响。相较于MRD与Tagnanan两个品种，MYD对椰蛀犀金龟雄虫、雌虫及总种群的吸引效果更为显著，种群影响更强。若在该区域种植同物种/同科的两类作物（油棕与椰子棕榈），则不被推荐，因为二者均会面临椰蛀犀金龟直接为害的相似问题，进而显著影响产量。因此，被视为杂交品种的MRD与Tagnanan被推荐给农户种植。农户种植该类品种时，不仅可获得更高产量，还能在相同周期内降低遭受椰蛀犀金龟严重为害的概率。