Indonesian Journal of Oil Palm Research Volume 26 Number 3 Year 2018 is published by presenting articles:  Water dynamics and flowering phase that determines oil palm productivity; Potential several weeds as cover crop in mature oil palm plantation; Effect of flubendiamida against nettle caterpillar Setothosea asigna van Eecke, bagworm Metisa plana Walker, bunch moth Tirathaba rufivena Walker of oil palm and it's impact to the activity of pollinator weevil Elaeidobius kamerunicus Faust.; Financial and economic analysis of intercropping (maize and soybean) with immature oil palm ; and The aplication of high constant-temperature oven method and intact seed utilization on determining seed moisture content of oil palm (Elaeis guineensis L. Jacq.)