Quick Search Cowpea Pests Posted byglobaladmin February 25, 2020 Leave a comment on Quick Search Cowpea Pests Credits: Biovision-Infonet Legume Aphid Aphids on cowpea (Aphis craccivora), they are about 1-2 mm long(c) A.M. Varela, icipe Black legume aphid (Aphis craccivora) is a relatively small aphid. Immatures are slightly dusted with wax, adults without wax. They are about 1-2mm long.(c) Clemson University – USDA Cooperative Extension Slide Series, Bugwood.org Cowpea aphids tended by ants.(c) A.M. Valera, icipe African Bollworm African bollworm (Helicoverpa armigera) on beans. Caterpillars are 3 to 4 cm in length.(c) A.M. Varela, icipe Flower or Blister Beetles Blister beetle (Mylabris oculata) (c) Botha AD (Courtesy of EcoPort, www.ecoport.org) Thrips Flower thrips (Megalurothrips sjostedti). Real size (0.9 to 1.1 mm) about the size of a flea, are barely visible to the naked eye.(c) Georg Goergen (Courtesy of EcoPort, www.ecoport.org) Thrips damage on bean pods(c) A.M. Varela, icipe Bugs The pod sucking Riptortus bug (Riptortus dentipes) is about 1.5cm long.(c) Georg Goergen, www.ecoport.org Spiny brown bug on French bean plant.(c) A.M. Varela, icipe Legume Pod Borer Legume pod borer (Maruca vitrata) reach a length of 18 mm(c) Courtesy EcoPort (http://www.ecoport.org): P. Ooi Cowpea Weevils Cowpea seed weevil on cowpea(c) F. Haas, icipe Cowpea seed beetle (Callosobruchus maculatus) adults are 2.-3.5 mm long. The adults emerge through windows in the grain, leaving round holes that are the main evidence of damage(c) F. Haas, icipe Cowpea damaged by cowpea seed beetles and weevils (Callosobruchus spp.) (c) A. M. Varela, icipe Root-knot Nematodes Root-knot nematodes (Meloidogyne incognita / M. javanica) Roots of severely attacked (left) and healthy plant (right). Affected plants are normally stunted and eventually wilt and die. The most characteristic symptom is formation of root galls (knots) and these can be seen with the naked eye. Affected roots rot.(c) A. M. Varela, icipe