Plant Parasites of Europe

leafminers, galls and fungi

Lathyrus

Lathyrus vetchling

(For a dichotomous table for galls on Lathyrus by Hans Roskam click here)

Dichotomous table for leafminers

In the wings of the stem and petioles mines can be found of Agromyza lathyri, A. varicornis and Liriomyza pisivora.

1a fleck mine: Coleophora coronillae (occurrence on Lathyrus uncertain)

1b blotch, tentiform or gallery mine => 2

2a larva with thoracic feet and chitinised head; blotch or tentiform mine => 3

2b larva a maggot; mine a gallery, or a gallery followed by a blotch => 15

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

3a pupation within the mine; tentiform mine => 4

3b pupation outside the mine; mine generally flat, not folded => 6

4a mine strongly inflated, leaflet almost entirely folded around the mine; upper surface of the mine mottled white; pupa: cremaster seemingly with one pair of strong spines (unknown for trifoliella) => 5

4b mine weakly inflated; upper surface of mine essentially green; cremaster with two pairs of extremely slender spines: Phyllonoryter insignitella

5a the cocoon consists of a lining of the walls of the mine: Phyllonorycter nigrescentella

5b the cocoon consists of a thin film under and above the pupa: Phyllonorycter trifoliella

6a mine inflated, its epidermis often torn: Sauterina hofmanniella

6b mine flat, epidermis entire => 7

7a mine smal; older larve lives free among spun leaves => 8

7b mine not unusually small; larva mines all its life => 12

8a mine contains almost no frass; larva: prothoracic shield largely dull black => 9

8b mine contains clear amounts of frass => 11

8c also Ancylis badiana is reported to make similar mines; the description is not sufficiently detailed

9a larva: pinacula colourless (however, the base of the setae is black): Cnephasia incertana

9b pinacula black => 10

10a larva: below/behind the anus a black chitinous comb: Cnephasia asseclana

10b anal comb absent: Cnephasia stephensiana

11a larva: uniformly purplish brown to dark greyish brown: Aproaerema anthyllidella

11b pale, reddish, conspicuously marked: Syncopacma karvoneni

12a mine contains little or no frass: Micrurapteryx gradatella

12b mine with normal quantities of frass => 13

13a in the mine, over the midrib, a lair of silk: Cosmopterix schmidiella

13b no silk in the mine => 14

14 on Lathyrus species bearing tendrils: Leucoptera lathyrifoliella

14b on species without tendrils: Leucoptera orobi

15a gallery widens into a large blotch => 16

15b a gallery till the end => 21

16a eventual blotch with large or small full depth patches => 17

16b no full depth patches present => 19

17a mine begins with a clear lower-surface gallery; larva: cephalic skeleton of Agromyzinae type => 18

17b lower-surface beginning extremely small; cephalic skeleton of Phytomyzinae type: Amauromyza chamaebalani

18a blotch largely full depth, with coarse frass grains; larva: rear spiraculum with ca. 40 papillae: Agromyza lathyri

18b blotch with only a few full depth spots, hardly any frass; rear spiraculum with 3 papillae: Agromyza varicornis

19a gallery part free from the leaf margin; blotch upon the midrib, with side branches; frass, at least partly, in thread fragments: Liriomyza xanthocera

19b gallery part follows the leaf margin; blotch free in the lamina, without extensions; frass in grains => 20

20a larva: cephalic skeleton Agromyzinae-type: Agromyza orobi

20b cephalic skeleton Phytomyzinae-type: Phytoliriomyza variegata

21a puparium in the mine, in a, usually lower-surface, pupal chamber: Chromatomyia horticola

21b puparium outside the mine => 22

22a pinnately branched gallery, its main branch overlying the midrib: Liriomyza strigata

22b mine not pinnately branched, not associated with the midrib => 23

23a gallery upper-surface; frass in a broad green central band; larva: rear spiraculum with 3 papillae: Liriomyza congesta

23b gallery generally begins at lower surface; frass not in a green band => 24

24a generally in greenhouses; larva: rear spiraculum with 3 papillae: Liriomyza trifolii

24b generally in open air; rear spiraculum with ≥ 4 papillae => 25

25a mine a gallery; frass in unusually long threads; larva: rear spiraculum with 4-8 papillae: Liriomyza pisivora

25b mine often ending in a secondarly blotch; frass in strings; rear spiraculum with 7-12 papillae: Liriomyza bryoniae

Tables for all parasites per species

Last modified 17.xi.2019