Aplikasi kitosan untuk penekanan kejadian penyakit dan peningkatan hasil panen tanaman padi (Oryza sativa L.)

Abstract

Chitosan is a derivative compound from chitin that has potential use as biopesticide and biostimulant. This research aimed to analiyze the effect of chitosan’s soluble liquid (SL) on the disease incident and rice yield. This research was conducted in two locations: Nglawak Village, Nganjuk District, East Java, and Harjasari Village, Tegal District, Central Java, in dry season of 2020. Chitosan SL application was carried out by foliar spray on rice plants at 2, 6, and 9 weeks after planting with the treatment of Chitosan SL 25 ml L-1 (P1), Chitosan SL 25 ml L-1+ synthetic pesticides (P2), and synthetic pesticides application as control (P0). Each treatment was replicated nine times in each location. The vegetative parameters observed consist of leaf color, number of tillers, and plant height, while the number of productive tillers was observed during the harvesting period. The observed disease incidence was bacterial leaf blight, sheath blight, and blast. The result showed that the application of Chitosan SL significantly affected disease suppression of sheath blight and rice yield compared to control, and there was no different effect between P1 and P2. The application of Chitosan SL suppressed sheath blight disease by 45% and increased rice yields by 25%.

Keywords

• biostimulant
• biopesticide
• chitosan
• rice
• soluble liquid