Pyrenochaeta lycopersici mainly attacks the root system of the tomato. The particularly sensitive rootlets turn brown, degrade quickly and disappear (Figures 1 and 2). The roots locally show brown and smooth alterations at first (figure 3). On the largest of them, we observe superficially corky lesions on the cortex, gradually surrounding the roots which eventually present more or less swollen, cracked and dry-looking sleeves (figures 4 to 6). Such corky sleeves are observed both on the taproot and on the secondary roots. In general, the plants attacked see the size of their root system more or less limited.

Notons home champignon east FAQ accompagné a cortège of ' invaders secondaires peu comme spécifiques Rhizoctonia solani , des Fusarium spp., Or spécialisés solanacées sur, comme Colletotrichum coccodes (syn. C. atramentarium ).

Root damage results in limiting the development of plants, which become more or less stunted. The lower leaves may be chlorotic and wilt during hot parts of the day, but may regain their turgor at night. In the most severe cases, leaf drying and leaf drop may be observed.

Last change : 04/13/21