Bilde: Swiss Chard Leaves Affected by Cercospora Leaf Spot Disease
Publisert:
Sist oppdatert: 16. april 2026 kl. 19:41:18 UTC
High-resolution close-up image of Swiss chard leaves infected with Cercospora leaf spot, displaying circular tan lesions with dark margins and yellow halos across green foliage.
Swiss Chard Leaves Affected by Cercospora Leaf Spot Disease
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Bildefilene som kan lastes ned nedenfor, er mindre komprimerte og har høyere oppløsning - og dermed høyere kvalitet - enn bildene som er innebygd i artikler og sider på dette nettstedet, som er mer optimalisert med tanke på filstørrelse for å redusere båndbreddeforbruket.
Vanlig størrelse (1,536 x 1,024)
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- Laster fortsatt opp... ;-)
Bildebeskrivelse
A high-resolution landscape photograph shows a dense cluster of Swiss chard plants displaying clear symptoms of Cercospora leaf spot disease. The image focuses on several large, overlapping leaves that dominate the foreground, their surfaces covered with numerous distinct lesions characteristic of the fungal infection. The chard leaves are broad and slightly crinkled with pronounced venation, and their central ribs and branching veins appear in vivid reddish-purple tones that contrast strongly with the mottled green leaf tissue.
Across the leaf surfaces are many circular to irregular spots that vary in size from a few millimeters to larger blotches. Each lesion typically features a pale grayish-tan or light brown center surrounded by a darker brown or purplish border. Many of the spots also display faint yellow halos where the surrounding leaf tissue has begun to discolor. In several areas the lesions have multiplied and merged together, forming larger patches of necrotic tissue that interrupt the otherwise healthy green coloration of the leaves.
The central leaf in the composition is the most prominent and heavily affected. Its surface shows a dense scattering of spots arranged between the raised veins, making the disease symptoms highly visible. The texture of the leaf appears slightly puckered and uneven, with subtle shadows accentuating the natural ridges and folds. The red midrib runs vertically through the leaf and branches outward into smaller veins, providing structure and visual contrast against the speckled pattern of infection.
Additional Swiss chard leaves fill the left and right sides of the frame. These leaves display similar symptoms, though the severity varies slightly from leaf to leaf. Some areas show individual well-defined lesions, while other regions contain clusters of overlapping spots that have expanded and fused together. The combination of green tissue, tan lesions, dark borders, and reddish veins creates a complex mosaic of colors and textures typical of advanced Cercospora infection.
The background consists of additional chard plants and garden foliage that gradually fall out of focus, creating a soft blur that helps emphasize the diseased leaves in the foreground. Despite the shallow depth of field, the red stems and green leaves of neighboring plants remain recognizable, suggesting a cultivated garden or agricultural setting.
Lighting in the scene is bright and even, highlighting the surface details of the leaves without harsh shadows. The illumination enhances the visibility of the lesions, the slight gloss of the leaf cuticle, and the natural color contrasts between healthy and damaged tissue. Overall, the image clearly illustrates the visual symptoms of Cercospora leaf spot on Swiss chard, with sharp focus on the distinctive circular lesions and the characteristic red-veined foliage.
Bildet er relatert til: How to Grow Swiss Chard: A Complete Beginner's Guide