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Abstract
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Mango (Mangifera indica) trees are infected by a variety of pathogens
that affect all parts of the tree and reduce the yield and quality of
the fruit. Leaf spot pathogens cause serious diseases of tropical fruit
trees and cause economic losses in these hosts (Okigbo & Osuinde,
2003). From June to August 2021, mango leaves affected by necrotic
spots with red margins (Figure 1) were sampled in Siaho in Hormozgan
province and Nikshahr, Ghasreghand, Rask and Konarak in Sistan and
Baluchestan province, Iran. The number of affected trees (a total of 368
trees in 20 gardens) ranged from 25 to 45% in the two provinces. A total
of forty diseased samples were collected from the 20 gardens. After
incubation of the samples on wet filter paper in the dark for 48 hours
at 25◦C, fungal isolates belonging to the genus Beltrania were obtained
from the samples. Colonies of the isolated fungus had a greyish centre
and white margin on potato dextrose agar. Conidia were solitary, 21–
26 µm long and 8–10 µm wide, and a rostrum 4.5–7 µm long (Figure 2)
(Penzig, 1882)
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