Cucumber smut is a disease that affects the quality and productivity of this crop. In this article from the “WORLD OF PLANTS” website, we shed light on the symptoms of the disease, its causes, and ways to combat it.
Definition of cucumber smut disease
English name: Anthracnose
Scientific name: Colletotrichum orbiculare
Type of disease: fungal
Family: Glomerellaceae
Symptoms of charred cucumber
Smut initially appears as small, water-filled lesions on the leaves. These lesions expand to form circular or irregular spots with brown to dark brown centers and dark edges. The lesions may wrap around the stem of the plant, causing wilting and vertical death. Lesions on fruits begin as sunken, dark spots that can merge and cover large areas.
Causes of charred cucumbers
This disease is caused by the fungus Colletotrichum orbiculare, which produces spores that spread the infection.
Suitable conditions for the spread of charred cucumber
Smut prefers warm (75-85°F), humid, or rainy conditions. The fungus is spread through splashing water, contaminated tools, and airborne spores.
Roasted cucumber cycle
The pathogen thrives in contaminated crop residues and harmful hosts. In the spring, the spores initiate new infections, with multiple disease cycles occurring during the growing season.
Cucumber roasting losses
Smut can cause severe leaf stripping, stem death, and fruit rot, leading to significant yield losses. Losses can reach 100% of the crop under severe conditions.
Strategies to combat cucumber smut
The use of resistant varieties, fungicides, crop rotation, and good hygiene practices are recommended.
Preventive measures for smut of cucumbers
Use disease-free seeds, manage moisture, and eliminate plant debris and harmful hosts.
Organic/chemical control of cucumber smut
Copper-based fungicides can help control smut organically. Traditional options include chlorothalonil, mancozeb, and strobolurin fungicides.
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