Dichotomous table for gallers on Antirrhinum
(A. orontium see Misopates orontium)
by Hans Roskam
1a On parts above ground => 2
1b On roots or on root collar. Nodular swellings on roots. Galls partially with side roots. Antirrhinum spp.: Meloidogyne hapla
2a On leaves => 3
2b Swelling of stem. A. latifolium, majus: Mesoscyonyx sicardi
2c Capsule slightly swollen and disfigured; a single or several beetle larvae inside. A. majus: Rhinusa antirrhini and/or Rhinusa neta
3a Leaves ± curled and margins deflected; bearing aphids on underside => 4
3b Leaves stunted on shortened shoot tips, pale green, deflected over tip and margins, brittle, appearing slightly thickened; with down of branched conidiophores on underside. A. hispanicum, majus, sempervirens: Peronospora antirrhini
4a Leaf blades strongly curled. Antirrhinum spp.: Aulacorthum solani
4b Leaf blades spoon-like arched, curled, ± discoloured, bearing aphids on underside. A. barrelieri: Myzus persicae