Final diagnosis


Bacterial wilt (Ralstonia solanacearum)

Several contiguous tomato plants showed reduced growth, weak vegetation and suddenly withered. <b><i>Ralstonia solanacearum</i></b> (bacterial wilt).
Rapid and irreversible wilting of a tomato plant grown under cover. Note the absence of symptoms on the contiguous feet. <b><i>Ralstonia solanacearum</i></b> (bacterial wilt, bacterial wilt).
Rapid and early wilting of a young tomato plant produced in the field. this is irreversible, some leaflets have yellowed and become necrotic. <b><i>Ralstonia solanacearum</i></b> (bacterial wilt).
Partial wilting of a fruit-bearing plant grown in the open field. <b><i>Ralstonia solanacearum</i></b> (bacterial wilt)
Rapid and early wilting of a young plant grown in soil under shelter. <b><i>Ralstonia solanacearum</i></b> (bacterial wilt)
The vessels of the lower part of the stem of this young plant gradually turn brown. <b><i>Ralstonia solanacearum</i></b> (bacterial wilt)
After cutting the stem longitudinally, the vessels show a slight brown tint in places. <b><i>Ralstonia solanacearum</i></b> (bacterial wilt)
In addition to the vessels, the marrow is also affected sometimes: it becomes moist and browns locally. <b><i>Ralstonia solanacearum</i></b> (bacterial wilt)
Piment-Plante
Partial wilting of a pepper plant grown in the field. <b><i>Ralstonia solanacearum</i></b> (bacterial wilt))
Observed after a longitudinal section, locally the vessels of this pepper plant sometimes appear locally very brown. <b><i>Ralstonia solanacearum</i></b> (bacterial wilt)
A superficial and longitudinal section made in the lower part of the stem of this pepper shows that the vessels are more or less brown. <b><i>Ralstonia solanacearum</i></b> (bacterial wilt)
Sudden withering of the leaves of a branch of this aubergine plant. <b><i>Ralstonia solanacearum</i></b> (bacterial wilt)
Eggplant completely withered. <b><i>Ralstonia solanacearum</i></b> (Bacterial wilt)
Ralstonia-Aubergine4
Ralstonia-Aubergine6
The withering of a branch of this eggplant plant is irreversible, many leaves are dried out. <b><i>Ralstonia solanacearum</i></b> (bacterial wilt)
Ralstonia-Aubergine9
The withering of this eggplant plant is irreversible, many withered leaves have turned yellow and are beginning to dry out. <b><i>Ralstonia solanacearum</i></b> (bacterial wilt)
Wilting and yellowing of a section of the leaf blade of this eggplant leaf. <b><i>Ralstonia solanacearum</i></b> (bacterial wilt)
Partially wilted and dried eggplant leaf, it is called unilateral wilt. <b><i>Ralstonia solanacearum</i></b> (bacterial wilt)
Wilting, yellowing and unilateral drying of an eggplant leaf; this is a very typical symptom of a vascular disease. <b><i>Ralstonia solanacearum</i></b> (bacterial wilt)
Several eggplant leaves show more or less advanced sectoral wilting, characteristic of a disease affecting the vessels. <b><i>Ralstonia solanacearum</i></b> (bacterial wilt)
Ralstonia-Aubergine13
Ralstonia-Aubergine5
Ralstonia-Aubergine2
A superficial and longitudinal section made in the lower part of the stem shows that the vessels are more or less brown. <b><i>Ralstonia solanacearum</i></b> (bacterial wilt)
Observed after a longitudinal section, the vessels of aubergine stems invaded by <b><i>Ralstonia solanacearum</i></b> sometimes appear locally very brown. (bacterial wilt)
Several potato plants reveal rolled up, even withered leaflets. <i><b>Ralstonia solanacearum</i></b> (bacterial wilt)
On this potato plant, the leaflets of certain leaves are rolled up, on the lowest leaf, they are withered or even dried out. <i><b>Ralstonia solanacearum</i></b> (bacterial wilt)
A potato plant is completely withered on this plantation row. <i><b>Ralstonia solanacearum</i></b> (bacterial wilt)
Different stages of leaf wilting and desiccation on two potato stems. <i><b>Ralstonia solanacearum</i></b> (bacterial wilt)
More or less extensive browning appearing on the tubers. <i><b>Ralstonia solanacearum</i></b> (bacterial wilt)
Reddish-brown browning spreading more or less around the vascular ring observed on potato tuber cut in half. <i><b>Ralstonia solanacearum</i></b> (bacterial wilt)
In addition to a browning of the vascular ring manifesting itself in the tubers, whitish mucous bacterial exudates may develop there. <i><b>Ralstonia solanacearum</i></b> (bacterial wilt)
Withering of a cucumber stalk: <i><b>Ralstonia solanacearum</i></b>
Withering of a cucumber stalk: <i><b>Ralstonia solanacearum</i></b>
Withering of a cucumber stalk: <i><b>Ralstonia solanacearum</b></i>
Slight browning of cucumber vascular tissue: <i><b>Ralstonia solanacearum</i></b>
Several plants are wilting in a patch of zucchini in the open field: <i><b>Ralstonia solanacearum</b></i>
Withering of a zucchini stalk: <i><b>Ralstonia solanacearum</b></i>
Wilting of 3 courgettes in a planting line: <i><b>Ralstonia solanacearum</i></b>
Melon
Melon plant completely withered following an attack by <b><i>Ralstonia solanacearum</i></b>
Microscopie1.jpg
Like a “water glass test” to exude viscous bacterial threads from the vessels. (<i>Ralstonia solanacearum</i> - Bacterial wilt)
Looks like a "water glass test" for exuding viscous bacterial threads from the vessels of a potato stem. (<i><b>Ralstonia solanacearum</b></i> - Bacterial wilt)