影像： Corn Leaf with Common Rust Infection
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最後更新： 2026年3月13日 晚上8:38:40 [UTC]
High-resolution close-up image of a corn leaf infected with common rust (Puccinia sorghi), showing numerous orange to reddish-brown pustules scattered across the leaf surface.
Corn Leaf with Common Rust Infection
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圖片說明
This high-resolution landscape photograph presents a detailed close-up of a single corn leaf affected by common rust, a fungal disease caused by Puccinia sorghi. The leaf stretches diagonally across the frame from left to right, occupying the central portion of the image and immediately drawing the viewer’s attention to the disease symptoms scattered across its surface. The leaf itself is vibrant green with visible longitudinal veins that run parallel along its length, creating subtle texture and structure typical of maize foliage. Across this otherwise healthy green background, numerous raised pustules appear in irregular clusters and scattered formations. These pustules vary in size but are generally small, rounded, and slightly elongated, and they exhibit colors ranging from bright orange to deeper reddish-brown tones. Many of the pustules appear ruptured or powdery, suggesting the release of fungal spores typical of rust infections. Around some pustules, faint halos of yellowish discoloration can be seen where the leaf tissue has been stressed or damaged by the pathogen.
The distribution of the rust lesions is uneven, with some sections of the leaf densely populated while others show only a few isolated spots. The pustules protrude slightly from the surface, creating a textured pattern that contrasts with the smooth waxy cuticle of the corn leaf. Fine specks of orange spores are visible around several lesions, reinforcing the sense that the infection is active and spreading. The leaf edges remain largely intact and green, although a few small areas near the margin show mild browning or stress consistent with disease progression.
Behind the leaf, the background is softly blurred with a shallow depth of field, emphasizing the infected leaf in the foreground. Out-of-focus corn plants fill the background, forming vertical green shapes that suggest a dense maize field. On the left side of the frame, a partially visible developing ear of corn with pale green husks and emerging silk adds agricultural context and confirms that the plant is maize. The soft background blur separates the subject from its surroundings, ensuring the rust symptoms remain the focal point.
Natural outdoor lighting illuminates the scene evenly, highlighting the vivid contrast between the healthy green leaf tissue and the warm orange-brown rust pustules. The lighting accentuates the textures of the leaf surface and the raised fungal structures without creating harsh shadows. Overall, the photograph serves as a clear visual example of common rust symptoms on corn, showing the characteristic pustules, their coloration, and their distribution across the leaf surface within the broader context of a maize field.
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