Fallopia black bindweed

Dichotomous table for leafminers

The traditional genus Polygonum has been split into 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 9.x.2017