| host plant genera | ||||
| Crataegus | Malus | Prunus | Pyrus | Sorbus |
| Crataegus | ||||
| circumanal ring consisting of |
capitate setae on dorsum of caudal plate |
number of capitate setae on margin of forewing bud | ||
 |
 |
 |
C. affinis | |
| one row of pores | present | variable | ||
 |
 |
 |
C. crataegi | |
| one row of pores | absent | > 5 | ||
 |
 |
 |
C. melanoneura | |
| one row of pores | absent | < 5 | ||
 |
 |
 |
C. peregrina | |
| several rows of pores | absent | absent | ||
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| Malus | ||||
| circumanal ring consisting of |
setae on antennal segment | |||
 |
 |
C. melanoneura | ||
| one row of pores | shorter than diameter of segment | |||
 |
 |
C. mali | ||
| several rows of pores | shorter than diameter of segment | |||
 |
 |
C. picta | ||
| one row of pores | apical seta longer than diameter of segment | |||
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| Pyrus | ||||
| number of marginal sectasetae on caudal plate | number of long capitate setae on margin of forewing bud | |||
 |
 |
C. bidens | ||
| 0 | 1-3 | |||
 |
 |
C. pyri | ||
| 0 | 1 | |||
 |
 |
C. pyricola | ||
| 0 | 2-3 | |||
 |
 |
C. pyrisuga | ||
| 3+3 | absent | |||
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| Sorbus | ||||
| circumanal ring consisting of | capitate setae on dorsum of caudal plate | long capitate setae on wing buds | number of marginal sectasetae on caudal plate |
|
 |
 |
 |
 |
C. albipes |
| one row of pores | long | absent | 3+3 | |
 |
 |
 |
 |
C. brevian- tennata |
| one row of pores | long | present | 3+3 | |
 |
 |
 |
 |
C. corcontum |
| one row of pores | short | absent | 0 | |
 |
 |
 |
 |
C. sorbi |
| several rows of pores | absent | absent | 2+2 | |
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Nymphs