Final diagnosis


Frost damage

Gele9
Gele11
On these leaves of the crown of a lettuce, one can easily distinguish elongated interveinal alterations, orange in color on the underside of the blade (right leaf). The latter is slightly blistered on the top (left sheet). <b> Frost damage </b>
The epidermis has burst in some places; orange, slightly depressed lesions developed. <b> Cold damage </b>
Gele7
Gele6
Gele8
Gele10
Tissue bursts are also visible along the midrib. <b> Frost damage </b>
This salad has been subjected to temperatures well below 0 ° C. As it thaws, it shows a limp habit and leaves appearing to have been scalded. <b> Frost damage </b>
Gele5
Gele1
Gele2
Gele3
Gele4
Jellies induces lesions in the pivot of this salad, promoting the penetration of secondary bacteria.