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<pre><em><span lang="EN-US">Insecticide application is a common practice done by farmers to control the whitefly Bemisia tabaci</span></em><em><span>. </span></em><em><span lang="EN-US">While the use of insecticide can suppress the whitefly population, the cost of soybean production is also increased. </span></em><em><span lang="EN-US">The </span></em><em><span>objective </span></em><em><span lang="EN-US">of this </span></em><em><span>research</span></em><em><span lang="EN-US"> was to compare the whitefly infestation and economic of two whitefly control methods on soybean production</span></em><em><span>.</span></em><em></em><em><span lang="EN-US">Two sets of experiments were done, one set with insecticide application and another one without insecticide application. Ten soybean cultivars were used in each set of experiment with completely randomized design and three replications.</span></em><em></em><em><span lang="EN-US">The whitefly infestation was observed weekly on sample plants on each plot. The benefit and R/C ratio were calculated based on revenue and total costs of soybean production. T<span>he average whitefly (egg and nymphs) population on the plots with insecticide application was</span></span></em><em><span> 4.95 for egg and 5.72 for nymph</span></em><em><span lang="EN-US"> per leaf, which was lower than those without insecticide application </span></em><em><span>11.76 for egg and 10.86 for nymph</span></em><em><span lang="EN-US"> per leaf. The average benefit and R/C ratio for the plots with insecticide application were IDR 9</span></em><em><span>,</span></em><em><span lang="EN-US">654</span></em><em><span>,</span></em><em><span lang="EN-US">507/ha and 1.5</span></em><em><span>1</span></em><em><span lang="EN-US"> respectively, while the average benefit and R/C ratio for the plots without insecticide application were IDR 8</span></em><em><span>,</span></em><em><span lang="EN-US">706</span></em><em><span>,</span></em><em><span lang="EN-US">299/ha and 1</span></em><em><span>.55</span></em><em><span lang="EN-US"> respectively. The study can be concluded that</span></em><em></em><em><span>growing soybean </span></em><em><span lang="EN-US">without insecticide treatment</span></em><em></em><em><span lang="EN-US">was</span></em><em><span> more efficient </span></em><em><span lang="EN-US">than growing soybean with insecticide applications</span></em><em></em></pre>