The cabbage webworm is an important pest of cruciferous crops, particularly in tropical and subtropical regions. Larvae attack plants at multiple growth stages and are especially destructive when feeding at the growing point.<\/p>\r\n
Because larvae feed within the plant\u2019s central bud and are often enclosed by developing leaves, they are protected from contact insecticides.<\/p>\r\n
Even a single larva can destroy a young plant.<\/p>","at_a_glance":{"host_plants":"Cabbage, pak-choi, radish, other Brassicaceae","where_you_see_it":"At the growing point, inside leaf folds, in stems","seasonality":"Occurs throughout the growing season in warm regions","typical_damage":"Destroyed terminal bud, mined leaves, stunted or dead seedlings"},"difficulty":"high: High","virus_risk":"none","sections":{"identification":"
Adults<\/p>\r\n\r\n
Greyish-brown moth<\/p>\r\n<\/li>\r\n \t
Pale dusky hindwings<\/p>\r\n<\/li>\r\n \t
Forewings with a prominent black spot and zigzag light brown lines<\/p>\r\n<\/li>\r\n<\/ul>\r\n
Eggs<\/p>\r\n\r\n
Yellow to orange<\/p>\r\n<\/li>\r\n \t
Laid on leaves, often near veins<\/p>\r\n<\/li>\r\n<\/ul>\r\n
Larvae<\/p>\r\n\r\n
Creamy white body with light pinkish-brown longitudinal stripes<\/p>\r\n<\/li>\r\n \t
Dark brown or black head<\/p>\r\n<\/li>\r\n \t
Up to 12\u201315 mm when fully grown<\/p>\r\n<\/li>\r\n \t
Often spin a silken tube at feeding site<\/p>\r\n<\/li>\r\n<\/ul>\r\n
Key Clues<\/p>\r\n\r\n
Silken webbing at plant center<\/p>\r\n<\/li>\r\n \t
Feeding damage in growing point<\/p>\r\n<\/li>\r\n \t
Wilting or collapse of young plants<\/p>\r\n<\/li>\r\n<\/ul>","damage":"
Young larvae mine leaves and bore into stems.<\/p>\r\n
Older larvae feed at the terminal bud, destroying the growing point and often killing the plant.<\/p>\r\n
Damage during early growth stages can result in complete crop loss.<\/p>","life_cycle":"
Females lay up to 300 eggs on host plant leaves.<\/p>\r\n
Larvae pass through several instars before pupating in a loose cocoon that incorporates soil particles.<\/p>\r\n
Pupation occurs on or near the plant.<\/p>\r\n
Multiple generations may occur in warm climates.<\/p>","monitoring":"
Inspect plant centers and growing points for larvae and webbing.<\/p>\r\n
Look for early leaf mining and stem boring.<\/p>\r\n
Because one larva can destroy a plant, action thresholds are low.<\/p>","management":"
Cultural control: Rotate with non-crucifer crops and protect seedlings in nurseries with nets.<\/p>\r\n
Chemical control: Apply insecticides early and direct spray to the plant center where larvae are feeding.<\/p>\r\n
Resistance management: Rotate insecticides with different modes of action and avoid unnecessary mixtures.<\/p>"}},"_links":{"self":[{"href":"https:\/\/cubescircle.de\/en\/wp-json\/wp\/v2\/organisms\/5368","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=5368"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}