Kalmar "codlin asu" tana nufin ƙaramin asu na iyalin Tortricidae, wanda shine kwaro na bishiyoyin apple. Kalmar "codlin" ta fito ne daga tsohuwar kalmar Ingilishi "coden," wanda ke nufin "apple dafa abinci." Larvae na asu codlin suna cin ’ya’yan itacen apple, suna jawo lahani ga amfanin gonar apple. Asu balagaggu yana da tsayin kusan 10-15 mm kuma yana da launin ruwan kasa-launin toka ko launin ruwan rawaya mai launin ruwan kasa mai tambari daban-daban akan fikafikansa.