Plant Parasites of Europe

leafminers, galls and fungi

gallers on Sherardia

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

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