Persentase Serangan Hama Penggerek Batang (Scirpophaga innotata Wlk.) Pada Tanaman Padi Organik dan Anorganik Di Desa Winebetan Kecamatan Langowan Barat

Abstract

Rice, Oryza sativa L. is one of the most important food crops for the Indonesian population because it is a staple food that is high in carbohydrates. Symptoms of an attack on the plant vegetative stage called sundep.  In the generative stage, the larvae drill the plants that will panicle, so that the flow of assimilation does not reach the rice grains.  Symptoms of attacks in the generative phase are called outs. The research was conducted by purposive sampling.  Observations using survey methods on.  At each observation location a diagonal line was drawn, so that there were five sub-plots measuring 5 m x 5 m.  Each sub-plot at each location was determined to be 300 families as sampling sites.  Observation of clumps attacked by S. innotata pest determined 50 clumps per sub-plot.  The total observed at each location was 250 clumps.Based on the results of research on the percentage of attacks by the white rice stem borer S. innotata in Winebetan Village, West Langowan District, namely: organic farming of 20.1 percent and inorganic 15.4 percent.  In rice cultivation, both organic and inorganic farming in fertilizing must pay attention to the balance of elements N, P, and K.