Final diagnosis


Candidatus Phytoplasma spp. (stolbur)

This plant affected by <b> <i> Candidatus </i> Phytoplasma solani </b> shows a very particular apex and habit. (stolbur)
Reduction in the size of new leaflets with curving edges. <b> <i> Candidatus </i> Phytoplasma solani </b> (stolbur)
The tips of this plant show a stiff, thick stem and very short internodes. The leaflets are small and spoon-shaped. <b> <i> Candidatus </i> Phytoplasma solani </b> (stolbur)
Yellowing and reduction in size of young leaflets. <b> <i> Candidatus </i> Phytoplasma solani </b> (stolbur)
In addition to being small in size, the leaflets are also chlorotic and coiled. <b> <i> Candidatus </i> Phytoplasma solani </b> (stolbur)
This plant tip is stunted, yellowish, and begins to anthocyaninate. <b> <i> Candidatus </i> Phytoplasma solani </b> (stolbur)
Under certain conditions, the tissues of infected organs take on a purple tint (anthocyanin colouration). In addition, the leaflets are also chlorotic. <b> <i> Candidatus </i> Phytoplasma solani </b> (stolbur)
Stolbur2
Sometimes the leaflets can be tiny and very chlorotic; this symptom could be caused by a particular strain of <b> phytoplasma </b> responsible for the said disease; small leaves. <b> <i> Candidatus </i> Phytoplasma solani </b> (stolbur)
We observe the proliferation of axillary branches more or less purplish and stiff in appearance. <b> <i> Candidatus </i> Phytoplasma solani </b> (stolbur)
On this plant, the affected tissues are particularly purplish (anthocyanin colouration); as well on the leaflets as on the few atrophied flowers. <b> <i> Candidatus </i> Phytoplasma solani </b> (stolbur)
These sterile flowers, devoid of petals, contrast a lot with normal flowers. The enlarged petioles give them an erect habit. Note the absence of petals and reproductive organs. <b> <i> Candidatus </i> Phytoplasma solani </b> (stolbur)
Huge sepals, small green petals. <b> <i> Candidatus </i> Phytoplasma solani </b> (stolbur)
These rather purplish tomato flowers have an enlarged calyx giving them the appearance of a skin. <b> <i> Candidatus </i> Phytoplasma solani </b> (stolbur)
Stolbur1
Several more or less spherical structures characterize the presence of the phytoplasma in the vessels of the phloem. <b> <i> Candidatus </i> Phytoplasma solani </b> (group of aster yellows)