Infected stems show irregular maturation and patches of brown and green tissue. In the following seasons, these infected plants show a slower…
green after wilting, until they are completely desiccated. Infected stems show long, dark brown streaks. The vascular tissue in the tubers becomes…
Phytophthora are occasionally associated with fungi. Symptoms Affected plants show yellowing in some branches or twigs followed by drooping and drying…
between 10 and 33 °C. Infected seeds can look healthy and do not necessarily show symptoms of infection. Soil temperature during seedling emergence is…
three different symptoms. Small feeder roots rot completely. Small roots may show smooth brown lesions. On older roots, the outer layers become…
(outer tissue layer) to orange-brown to dark brown. Cutting the roots may show the same discolouration of the internal tissues of the main roots. In…
healthy heads. The glumes are opened either on some or on all spikelets, showing the bunt (smut spore) they contain, which is larger than a normal…
and subsequent expansion of the wilt upwards. Cutting the stem at the foot shows whitish ooze with bacteria in the case of C lavibacter infection, but…
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