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5. Low Humidity. Light brown spots scattered across fiddle leaf fig leaves can be caused by dry air. If the brown spots in question have a pox-like look instead of being in a single area of the ...
Dark brown lesions are found on leaves, stems, petioles, and bracts. Stem lesions are normally narrow (1-3mm) black streaks that get up to 3 cm long. The pathogen may cause linear spots on stems and water-soaked, sunken lesions on the back of the sunflower head. Some spots could have yellow halo around the spots. [4]
Cercospora leaf spot Cercospora spp. Fe Corynespora leaf spot Corynespora cassiicola: Fb Gray mold Botrytis cinerea: Fe, Fl Phomopsis dieback Diplodia spp. Fb Southern blight Sclerotium rolfsii: Fb, Fe, Fl Verticillium wilt Verticillium albo-atrum: Fb
Mycosphaerella henningsii is a fungal plant pathogen that causes Brown leaf spot (BLS) in cassava).Part It is one of the worst fungal diseases of cassava. BLS disease appears as small brown spots with dark borders on the upper leaf surface. The brown spots form between leaf veins so their size and shape are limited by the veins.
Kudzu bugs are brownish-green with dark brown spots. They are about a quarter of an inch large. ... In nature, they hibernate in leaf litter and under bark. “In the spring, however, they will ...
The spots appear to have rings of brown with a purple margin, thus giving it its frogeye appearance. The spots can then produce pycnidia which can separate this species of fungus from other possible leaf fungi. [1] Canker. On twigs, branches and trunks B. obtusa can infect where there has been a winter injury or fire blight cankers. Slightly ...
There are several different strains of the fungus that exist to infect different banana varieties around the globe. Symptoms include yellowing of the tissue and formation of small dark brown spots on the leaves and fruit. Within the spots, conidia or pycnidia can be found. Banana freckle is easily propagated and spread from plant to plant by ...
On leaves, lesions begin as chlorotic (yellow) spots that expand to become deep brown and necrotic on the upper leaf surface. [3] These spots often have a discolored, light center where sporulation can occur, and many have a yellow "halo" around the margins. This halo is caused by the toxin cercosporin, produced by Cercospora species. [1]