Plant Parasites of Europe

leafminers, galls and fungi

gallers on genus Foeniculum

Dichotomous table for gallers on Foeniculum vulgare

by Hans Roskam

1a On above-ground plant parts => 2

1b Nodular swellings on roots. Meloidogyne hapla

2a On parts of inflorescence or on fruits => 6

2b On vegetative parts => 3

3a Malformations caused by animal parasites => 4

3b Stalks, midrib or veins of leaves, also stalk of umbel or fruit with bulging swellings bearing spermogonia and pale-yellow aecia. Uromyces graminis

4a Rosette leaves or terminal parts of vegetative shoots variously disfigured by aphids; midrib ± stunted and distorted; tips of leaflets clustered, curved and curled => 5

4b Globular swelling of ramification of leaflet; gall inside covered with mycelium. Containing a single gall midge larva. Lasioptera carophila

4c Midrib of leaf locally severely stunted and including some side spindles strongly converging downwards, nest-like. Philaenus spumarius

5a Aphid black. Aphis fabae

5b Aphid green. Cavariella aegopodii

6a Centre of umbel or stalk of umbel ± swollen, club-shaped. Inner wall covered with mycelium. Containing a single red larva. Lasioptera carophila

6b Spindle-shaped swelling of stalk of umbel. Containing a single yellow larva. Lasioptera umbelliferarum

= Lasioptera foeniculi has been described causing fruit galls. Galls from September up to November; larvae pupate in soil, adults emerge about 10 days afterwards.

6c ruit conspicuously swollen, ± reddened, often protruding above the partial umbel. Containing a single orange-red larva. Kiefferia pericarpiicola

Last modified 18.xi.2023