Chen, Y., Qing, X., Liu, J., Zhang, J. and Zhang, R. 2013. Toxic effects of virtako on the brown planthopper, Nilaparvata lugens (Hemiptera: Delphacidae). Revista Colombiana de Entomología. 39, 2 (Dec. 2013), 197–200. DOI:https://doi.org/10.25100/socolen.v39i2.8234.