Fusarium crown and stem rot of 2023 Sponsors Echeveria

Succulent vegetation proceed to be extremely popular in manufacturing. At
a current greenhouse go to, Echeveria vegetation have been yellowing,
shriveling, and dying from Fusarium an infection.

Usually when particular person vegetation begin dying on greenhouse benches, frequent root pathogens, together with Pythium and Phytophthora, are suspected. When the Echeveria stems and roots have been examined, signs weren’t typical of Pythium an infection, which often causes extra of a “delicate rot” of the crown and roots. The leaves and stem had extra of a “dry rot” look the place the leaves have been yellowed, turned brown to black, shriveled, have been leathery, and stayed intact (Photos 1 and a couple of). Beneath the plant cover on the stem on the soil line, white clusters of Fusarium spores and hyphae might be seen (Picture 3). Fusarium spores are considerably sticky and are simply unfold by water-splashing, wind, and employee exercise on contaminated instruments and fingers. Fusarium is an efficient colonizer of weakened tissues, notably from drought stress. Soils that undergo repeated cycles of extreme drying and re-wetting will stress the roots and foliage, which may be readily contaminated by Fusarium. The species of Fusarium was not decided on this plant pattern. Most frequently, the reason for the stem rot is Fusarium oxysporum. Some F. oxysporum isolates are very host particular; nevertheless, many are usually not.

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