I.WHITE GRUBS White grubs are also called grubs. Their adults are chafers in Coleoptera. White grubs are one category of the most damaging ground pests. More than 110 species are recorded in China.8 Ⅰ. WHITE GRUBS . WHITE GRUBS White grubs are also called grubs. Their adults are chafers in , Coleoptera. White grubs are one category of the most damaging ground pests. More than 110 species are recorded in China