Beta beet
See also Patellifolia.
Beet miners are described in more detail by Skuhravy ao (1967a).
(For a dichotomous table for galls on Beta by Hans Roskam click here)Dichotomous table for leafminers
1amine full depth; larva with chitinised head => 2
1b mine upper- or lower-surface; larva a maggot => 7
1c fleck mine =16
1d galls, etc. => Tables for all parasites per species
Dichotomous table for leafminers
1amine full depth; larva with chitinised head => 2
1b mine upper- or lower-surface; larva a maggot => 7
1c fleck mine =16
1d galls, etc. => Tables for all parasites per species
2a mine small, very irregular in shape => 3
2b mine not that small, with a more constant shape => 5
3a larva: pinacula colourless (the bases of the setae themselves are black) : Cnephasia incertana
3b pinacula black => 4
4a larva: behind/below the anus a chitinous comb: Cnephasia asseclana
4b anal comb absent: Cnephasia stephensiana
5a larva without feet: Pseudophytobius acalloides
5b larva with thoracic fewet and prolegs => 6
6a mine in stem or midrib, with offshoots into the leaf: Scrobipalpa ocellatalla
6bmine completely within a leaf : Scrobipalpa nitentella
7alarge whitish blotch without an initial corridor; much blackish-green frass; at the beginning of the first mine (the larvae may leave a mine and start again elsewhere) a group of oval egg shells => 8
7bcorridor, ending or not in a blotch; at most one egg shell at mine begin => 10
8a larva: lowest of the mandibular teeth exceptionally large: Pegomya cunicularia
8blowest tooth not that large (nb: the larva of Pegomya interruptella is not described) => 9
9aangle between terminal and subterminal mandibular teeth almost 90°: Pegomya betae
9bthis angle very sharp: Pegomya hyoscyami
10amine ends in a blotch; frass in grains => 11
10bmine a corridor untill the end; frass in strings => 14
11aat mine begin, at the lower-surface of the leaf an egg shell (may fall off!!) => 12
11bno egg shell => 13
12ainitial corridor with irregular margins and side branches, rather abruptly terminating in a blotch; egg shell tender, not ribbed, easily falling off; anterior spiracle of larva with 5-7 papillae: Psilopa leucostigma
12binitial corridor with smooth margins, gradually widening into a blotch; egg shell fiirm, ribbed, persistent; anterior spiracle of larva with 2 papillae: Clanoneurum cimiciforme
13ablotch with wide offshoots where frass is located in green bands: Scaptomyza graminum
13bfrass scattered regularly, very sparingly, in fine greyish black grains: Amauromyza flavifrons
14acorridor pinnately branched, main branch positioned over the midrib: Liriomyza strigata
14bcorridor not pinnately branched or unbranched, not associated with the midrib => 15
15a corridor usually starts lower-surface, turning upper-surface later; regularly forming a secondary blotch: Liriomyza bryoniae
15b corridor usually starts upper-surface, turning lower-surface later; rarely forming a secondary blotch: Liriomyza huidobrensis
16a case unusually slender; Canary Islands: Coleophora pseudopoecilella
16b case rather squat; Mediterranean Region: Coleophora crepidinella
Not included in the key: Liriomyza trifolii; Scrobipalpa atriplicella.