Fallopia black bindweed

Dichotomous table for leafminers

The traditional genus Polygonum has been split into Bistorta, Fallopia (incl. Bilderdykia, Reynoutria), Persicaria, and Polygonum.

1a large transparant blotch containing several big maggots: Pegomya setaria **

1b mine smaller; larvae with chitinised head, solitary => 2

1c galls, etc => Tables for all parasites per species

2a silvery, epidermal corridor: Calybites phasianipennella (youth mine)

2b mine full depth => 3

3a square, brownish, weakly inflated tentiform mine; older larvae life free, in a leaf roll: Calybites phasianipennella

3b small (< 1 cm) irregular corridor or blotch, mostly with a hole at either end; often several mines in a leaf; older larve live free, causing window feeding: Hypera rumicis

** The possibility exists that also Pegomya bicolor and solennis incidentally occur on Fallopia.

Not included in the key: Liriomyza trifolii; Monochroa sepicolella.

mod 6.x.2018