“…This plant is grown in more than 13 000 ha, but the village of Milpa Alta, south of Mexico City produces more than 40% of nopal (SIAP, 2013). It is known in this area the existence of pests and diseases that reduce the production of this crop, mainly affecting the vigour of the plant, causing weakness, chlorosis and severe infestations that can cause death (Palomares-Pérez et al, 2010;CESAVEDF, 2011;Palomares-Pérez et al, 2012). However, in Mexico there are no formal studies to identify the organisms associated 2010; CESAVEDF, 2011;Palomares-Pérez et al, 2012).…”