Soybean pest control in tidal swamp, South Kalimantan

Abstract

Pest is one of the problems in soybean development area on tidal swamp. Every year, pest attacks cause 15-20% soybean production lost. The study was conducted within oil palm plants, on tidal swamp, Barito Kuala, Southern Kalimantan, in the dry season of 2016. The research was arranged in a randomized block design each treatment was replicated 6 times nested within treatment. Treatment consists of: 1. Untreated plot, 2. Bioinsecticides (Mixed SBM 50 g/l + SlNPV 2 g/l) based on monitoring (4x), 3. Bioinsecticides (Mixed SBM 50 g/l + S/NPV 2 g/l) weekly (6x), 4. Chemical insecticides based on monitoring (4x). The results showed that the pests found were Spodoptera litura, Plusia calsites, Lamprosema indicata, Riptortus linearis, Nezara viridula and Etiella zinckenella. All of them with low population numbers. But at 65 days after planting (DAP), population of S. litura was very high and caused plant damage up to 80%. Monitoring based bioinsecticides and weekly bioinsecticides application effectively suppressed low population and plant damage than chemical treatment based on monitoring. Soybean productivity achieved were 1.623 t/ha; 1.8 t/ha and 1.725 t/ha by monitoring based bioinsecticides, weekly bioinsecticides and chemical control based on monitoring respectively