Cardamom root grub (Basilepta fulvicorne: Chrysomelidae) is a major pest damaging roots of small cardamom (Elettariacardamomum Maton) causing 29 to 66 percent crop loss under various levels of infestation. Chemical control with agrochemicals viz. Chlorpyrifos and Phorate, though help in managing the pest, repeated application of such chemicals is deleterious to soil microbes that contribute to the health of soils. The application of agrochemicals disrupts the agroforestry ecosystem in the Western Ghat region that support the cultivation of several spices including small cardamom. Moreover, these chemicals are banned for use in cardamom cultivation. Biological control of root grub is a suitable alternative; Entomopathogenic fungi such as Beauveria bassiana (on beetles of root grub) and Metarhizium anisopliae (on grubs) are pathogenic to the pest, but controlling under field condition is not highly effective. Entomopathogenic nematode (EPN), a native isolate Heterorhabditis indica (ICRI EPN 18) is highly effective in controlling the pest under field conditions. The technology of mass production and application of EPN, which are user-friendly, in the field has been standardized. Several farmer groups, NGOs, a commercial firm, and field officers of Spices Board were trained on the technology; more than 500 farmers used EPN in their fields, and root grub problem were effectively controlled in Kerala and Karnataka.