Dichotomous table for gallers on Sherardia arvensis
by Hans Roskam
1a On parts above ground => 2
1b Roots with small nodular or spindle-shaped swellings. Meloidogyne hapla
2a Leaves broadened terminally on non-flowering shoots, ± arched or rolled, usually yellowish or reddish. Trioza velutina
2b Stem gall containing a single yellow midge larva. Dasineura sp.
2c Diseased young plants densely bushy. Internodes sometimes stunted, like adjacent reduced, pale-green leaves slightly thickened and lined by a down of branched conidiophores. Peronospora sherardiae