Lettuce
Variety Resistance to downy mildew (Bl) (races) Resistance to Lettuce mosaic virus (LMV) Cropping period Head Recommended plant density (plants per hectare) Features
spring (under cover) spring summer autumn Greenhouses, tunnels
early winter mid-winter early spring
Lollo rossa type
Luberon 1 - 16, 19, 21, 23     +++ +++ +++       open 80000 - 110000 Very nicely dissected leaves of intense red color
Lollo bionda type
Casabella 1 - 16, 19, 21, 23     +++ +++ +++ +++ +++ +++ open 80000 - 100000 Slow bolting, very nice texture
Oakleaf (light) type
Freesol 1 - 24 R   +++   +++ +++     compact 80000 - 90000 Tolerant to necrosis and bolting
Oakleaf (red) type
Vulsini 1 - 25 R +++ +++ +++ +++ +++ +++ +++ closed 90000 - 100000 Good field tolerance to tipburn and bolting during summer
Grand Rapid type
Hugin 1-23, 25 R ++ +++ ++ +++ +++ ++ +++ semi-open 90000 - 100000 Rapid growth, bolting tolerance
Iceberg Specialy type
Frillice 1-5, 7 R +++ +++ +++ +++ +++ +++ +++ open 80000 - 90000 Slow bolting, crisp texture
Iceberg type
Stallion 1 - 23   +++ +++ ++ +++ ++ ++ ++ closed 80000 - 90000 A reliable and proven variety. Excellent taste
Butterhead type
Alanis 1 - 25 IR   +++ +++ +++       closed 80000 - 90000 Bolting tolerance. Excellent taste
 

Note:

LMV - Lettuce mosaic virus.
Bl - downy mildew (Bremia lactucae).