Identification of Potential Weeds as Refugia Plants On Upland Rice (Oryza sativa L.) at Jembayan Kutai Kartanegara

Abstract

An experiment to study the potential weed as refugia on upland rice was done at Jembayan, Kutai Kartanegara, from October up to December.  Species Asystasia gangetica, Synedrela nodiflora,  Lantana camara and Cyperus iria were identified as the dominant weeds over the area, but only A. gangetica and S. nodiflora was choosen because of they adequate of the potential criteria as refugia. The experimental design used was Complete Randomized Design, consisted of nine repetitions and three treatments, namely p₀ = without refugia/control, p₁= Synedrella nodiflora, p₂ = Asystasia gangetica. The Least Significant Difference (LSD 5%) was used to compare the averages between two treatments and Pearson Correlation Analysis was used to seen of the two insects population. This study showed that the two weeds can be used as refugia with the results of insect abundance obtained were  significantly different in insects pest, and also insect natural enemies. The order of natural enemy insects obtained include the orders Araneae, Hymenoptera, Coleoptera, and Odonata.