{"id":5370,"date":"2026-02-20T16:11:46","date_gmt":"2026-02-20T15:11:46","guid":{"rendered":"https:\/\/cubescircle.de\/?post_type=organism&#038;p=5370"},"modified":"2026-02-20T16:11:48","modified_gmt":"2026-02-20T15:11:48","slug":"cowpea-weevil","status":"publish","type":"organism","link":"https:\/\/cubescircle.de\/en\/organism\/cowpea-weevil","title":{"rendered":"Cowpea Weevil"},"content":{"rendered":"","protected":false},"featured_media":0,"template":"","class_list":["post-5370","organism","type-organism","status-publish","hentry","no-post-thumbnail"],"acf":{"common_name":"Cowpea Weevil","scientific_name":"Callosobruchus maculatus (F.)","taxonomy":{"order":"Coleoptera","family":"Bruchidae","genus":"Callosobruchus","species":"maculatus"},"overview":"<p data-start=\"277\" data-end=\"452\">The cowpea weevil is a major pest of stored legumes in tropical and subtropical regions. Infestation often begins in the field during pod development and continues in storage.<\/p>\r\n<p data-start=\"454\" data-end=\"545\">Larvae develop inside individual seeds, where they are protected from contact insecticides.<\/p>\r\n<p data-start=\"547\" data-end=\"679\">Because development occurs within seeds and populations increase rapidly under warm storage conditions, management can be difficult.<\/p>","at_a_glance":{"host_plants":"Cowpea, lentil, mung bean, pigeon pea, pea, common bean","where_you_see_it":"Inside stored seeds; adults on stored grain","seasonality":"Field infestation during fruiting; severe damage during storage","typical_damage":"Hollowed seeds, round exit holes, reduced seed viability"},"difficulty":"high: High","virus_risk":"none","sections":{"identification":"<p data-start=\"1087\" data-end=\"1095\">Adults<\/p>\r\n\r\n<ul data-start=\"1096\" data-end=\"1216\">\r\n \t<li data-start=\"1096\" data-end=\"1127\">\r\n<p data-start=\"1098\" data-end=\"1127\">Small beetle, 2\u20133.5 mm long<\/p>\r\n<\/li>\r\n \t<li data-start=\"1128\" data-end=\"1177\">\r\n<p data-start=\"1130\" data-end=\"1177\">Pale brown with darker patches on wing covers<\/p>\r\n<\/li>\r\n \t<li data-start=\"1178\" data-end=\"1216\">\r\n<p data-start=\"1180\" data-end=\"1216\">Short lifespan (around 10\u201312 days)<\/p>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"1218\" data-end=\"1224\">Eggs<\/p>\r\n\r\n<ul data-start=\"1225\" data-end=\"1286\">\r\n \t<li data-start=\"1225\" data-end=\"1251\">\r\n<p data-start=\"1227\" data-end=\"1251\">Oval, translucent grey<\/p>\r\n<\/li>\r\n \t<li data-start=\"1252\" data-end=\"1286\">\r\n<p data-start=\"1254\" data-end=\"1286\">Glued directly to seed surface<\/p>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"1288\" data-end=\"1296\">Larvae<\/p>\r\n\r\n<ul data-start=\"1297\" data-end=\"1383\">\r\n \t<li data-start=\"1297\" data-end=\"1314\">\r\n<p data-start=\"1299\" data-end=\"1314\">Cream-colored<\/p>\r\n<\/li>\r\n \t<li data-start=\"1315\" data-end=\"1356\">\r\n<p data-start=\"1317\" data-end=\"1356\">Develop entirely inside a single seed<\/p>\r\n<\/li>\r\n \t<li data-start=\"1357\" data-end=\"1383\">\r\n<p data-start=\"1359\" data-end=\"1383\">Not visible externally<\/p>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"1385\" data-end=\"1396\">Key Clues<\/p>\r\n\r\n<ul data-start=\"1397\" data-end=\"1488\">\r\n \t<li data-start=\"1397\" data-end=\"1426\">\r\n<p data-start=\"1399\" data-end=\"1426\">Round exit holes in seeds<\/p>\r\n<\/li>\r\n \t<li data-start=\"1427\" data-end=\"1454\">\r\n<p data-start=\"1429\" data-end=\"1454\">Hollowed seed interiors<\/p>\r\n<\/li>\r\n \t<li data-start=\"1455\" data-end=\"1488\">\r\n<p data-start=\"1457\" data-end=\"1488\">Presence of adults in storage<\/p>\r\n<\/li>\r\n<\/ul>","damage":"<p data-start=\"1508\" data-end=\"1624\">Larvae bore into seeds and feed internally, consuming cotyledons and reducing both quality and germination capacity.<\/p>\r\n<p data-start=\"1626\" data-end=\"1720\">Heavy infestations can cause substantial quantitative and qualitative losses in stored pulses.<\/p>\r\n<p data-start=\"1722\" data-end=\"1782\">Seed lots may become unsuitable for planting or consumption.<\/p>","life_cycle":"<p data-start=\"1806\" data-end=\"1850\">Females lay up to 115 eggs on seed surfaces.<\/p>\r\n<p data-start=\"1852\" data-end=\"1901\">Eggs hatch within 5\u20136 days under warm conditions.<\/p>\r\n<p data-start=\"1903\" data-end=\"1949\">Larvae develop within seeds and pupate inside.<\/p>\r\n<p data-start=\"1951\" data-end=\"2058\">Under optimal conditions (around 32\u00b0C and high humidity), the life cycle may be completed in about 3 weeks.<\/p>\r\n<p data-start=\"2060\" data-end=\"2108\">Multiple generations can develop during storage.<\/p>","monitoring":"<p data-start=\"2132\" data-end=\"2179\">Inspect seeds for eggs attached to the surface.<\/p>\r\n<p data-start=\"2181\" data-end=\"2218\">Look for exit holes and hollow seeds.<\/p>\r\n<p data-start=\"2220\" data-end=\"2308\">Crack open seeds or use non-destructive methods (e.g., X-ray) to detect internal larvae.<\/p>","management":"<p data-start=\"2332\" data-end=\"2419\">Cultural control: Remove and destroy infested residues from previous storage seasons.<\/p>\r\n<p data-start=\"2421\" data-end=\"2515\">Physical control: Cold treatment can kill adults and reduce infestations in small seed lots.<\/p>\r\n<p data-start=\"2517\" data-end=\"2622\">Chemical control: Fumigation or approved insecticides may be used in storage facilities when necessary.<\/p>"}},"_links":{"self":[{"href":"https:\/\/cubescircle.de\/en\/wp-json\/wp\/v2\/organisms\/5370","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cubescircle.de\/en\/wp-json\/wp\/v2\/organisms"}],"about":[{"href":"https:\/\/cubescircle.de\/en\/wp-json\/wp\/v2\/types\/organism"}],"wp:attachment":[{"href":"https:\/\/cubescircle.de\/en\/wp-json\/wp\/v2\/media?parent=5370"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}