Genomic insights into the glutathione S-transferase gene family of two rice planthoppers, Nilaparvata lugens (Stål) and Sogatella furcifera (Horváth) (Hemiptera: Delphacidae). mā Wen-Wu Zhou, Qing-Mei Liang, Yi Xu, Geoff M Gurr, Yan-Yuan Bao, Xue-Ping Zhou, Chuan-Xi Zhang, Jiaan Cheng, Zeng-Rong Zhu