1. Alcazar, J., Palacios, M., andRaman, K.V. 1982.Symmetrischema plaesiosema (Turner, 1919) (Lepidoptera: Gelechiidae). Nuevo problema de la papa en el valle del mantaro. XXV Convenction Nacional de Entomologia. October 3–7, 1982, Huaraz, Peru.
2. Attygalle, A.B., Herrig, M., Vostrowsky, O., andBestmann, H.J. 1987. Technique for injecting intact glands for analysis of sex pheromones of Lepidoptera by capillary gas chromatography: Reinvestigation of pheromone complex ofMamestra brassicae.J. Chem. Ecol. 13:1299–1311.
3. Brown, C.A., andAhuja, V.K. 1973. Catalytic hydrogenation. VI. The reaction of sodium borohydride with nickel salts in ethanol solution. P-2 nickel, a highly convenient, new, selective hydrogenation catalyst with great sensitivity to substrate structure.J. Org. Chem. 38:2226–2230.
4. CIP. 1993. CIP in 1992: Program report. The International Potato Center (CIP), Lima, Peru, 173 pp.
5. Ewell, P.T., Fano, H., Raman, K.V., Alcázar, J., Palacios, M., andCarhuamaca, J. 1990. Farmer management of potato insect pests in Peru. International Potato Center (CIP), Lima, Peru. 87 pp.