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Leaf and pod insect pests are important on soybean (Glycine max L.) in Indonesia, causing loss of seed production. The study was carried out to evaluate the potential of water crude extract mixture of Azadirachta indica seed, Cymbopogon nardus plant and Alpinia galanga rhizome to control leaf and pod insect pests on soybean. The study was conducted in the organic farming system cultivation of soybean and it was arranged with Randomized Block Design. The concentrations of crude extract were 5, 10, 20 and 40% (v/v) applied on soybean. The result showed that crude extract significantly affected on the damages of leaf and pod caused by the insect pest and seed production. The 20 and 40% of extracts concentrations resulted in 16.07 and 14.97% leaf damage caused by insect, pod damage of 5.38 and 5.33% and 7.56 and 6.77% caused by sucking insect and pod borer insect, respectively. Those concentrations yielded 436.0 and 540.6 g of seed production/3m plot size, respectively. This study showed that the mixture of crude extracts has the potential to be used in controlling insect pests on soybean.

Response of Insect Pests to Botanical Insecticide Application on Leaf and Pod Soybean (Glycine max L.) of Organic Farming System