Soil serves as a reservoir for Aspergillus flavus and A. parasiticus, fungi that produce carcinogenic aflatoxins in agricultural commodities. Populations in soil are genetically diverse and individual genotypes show a clustered distribution pattern within fields. Surveys over large geographic regions suggest that climate and crop composition influence species density and aflatoxin-producing pot...

The production of aflatoxins B1 and B2 by Aspergillus tamarii (subgenus Circumdati section Flavi) is reported for the first time. The fungus was isolated from soil collected from a tea (Camellia sinensis) field in Miyazaki Prefecture, Japan. Three single-spore cultures, NRRL 25517, NRRL 25518, and NRRL 25519, were derived from subcultures of the original isolate 19 (MZ2). Each of these single-s...

These studies aimed to identify differences and similarities within the progeny of <i>Rhizoctonia solani</i> AG5, which arose from basidiospores produced by maternal strain ID23. The following characteristics were analyzed: appearance mycelium (color, structure, zonation, presence sclerotia), growth rate (at 10°C, 20°C, 30°C), fungicide sensitivity, hyphal structure. mycelial color ...

In May 2019, mature jackfruit (Artocarpus heterophyllus) fruits were found infected with fan-shaped white mycelia and brown to black sclerotia at the Bangladesh Agricultural Research Institute (BARI), Gazipur, Bangladesh. The fungus was successfully isolated on potato dextrose agar medium. internal transcribed spacer region of rDNA amplified using primer pair ITS1 ITS4. Based morphology molecul...

Cotty, P. J. 1989. Virulence and cultural characteristics of two Aspergillus jlavus strains pathogenic on cotton. Phytopathology 79:808-814. Seventy Aspergillus flavus isolates from Arizona desert valleys were sorted into two distinct strains on the basis of sclerotial size, cultural characteristics, and virulence to cotton. Strain L isolates produced large sclerotia (over 400 /lm in diameter),...