low temperatures or sudden fluctuations in temperature. Pythium ultimum mostly occurs at low soil or water temperatures and causes among others cereal…
becomes thick-walled and swollen as a dormant survival structure. Infection mostly occurs before pollination and within one to two days after…
seedling emergence is critical for infection. Soil temperatures below 12 °C are most conducive for this disease and infection does not occur at soil…
the epidemic has not yet been established. Pestalotiopsis clavispora is mostly found in plants that have been weakened by some form of stress, from un
and 26 °C with an optimum between 13 and 15 °C. Germination and infection mostly take place at high soil water content over a prolonged period of…
visible. On the leaves, round and extending lesions may occur. In cucumber, the most important symptom is internal fruit rot, which can only be…
of these conidia. There is no known sexual stage. Ascochyta fungi develop most rapidly at temperatures below 20 °C and the spores require water for…
demarcation line on cucumber roots. The lesions are slightly sunken and are mostly formed around the point of attachment of lateral roots and root…
infection by Triticum tritici and Triticum laevis . Since Triticum controversa mostly attacks the 2-3 leaf stage, this is less effective for this…
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