Final diagnosis


Pests (aphids, whiteflies) and Sooty mould

Sooty mould on tobacco
Several tobacco leaves have a dull appearance and seem to be covered with soot. Sooty mould
When having a close look one can observe black soot on the leaves, actually it is superficial black mould. (Sooty mould)
Aphids are not very mobile, they are 1.5 to 2.5 mm long, of varying colour depending on the species (green, black, pink), wingless or winged types.
Whiteflies have wings, they are white, 1.2 to 1.5 mm long. Their larvae are flattened, oval and ciliated.
Damage caused by acarians
Damage caused by acarians on a tobacco leaf.
The veins and tissues in the vicinity are covered with a multitude of small silver spots, dotted with black droppings, locally giving a greyish colour to lamina. <b>Thrips damage</b>
Thrips damage
Tiny white lesions scattered on the lamina of Virginia tobacco leaf. Leafhopper damage
Leafhopper damage