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在哥斯达黎加南太平洋海岸的油棕种植区(蓬塔雷纳斯省坎顿州)。进行了2a的试验,研究61种普通杂草对增加油棕害虫
Oil palm growing area on the South Pacific coast of Costa Rica (Canton of Province of Puntarenas). A trial of 2a was conducted to study the effects of 61 common weeds on oil palm pests