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PEANUT-POD MYCOFLORA AND KERNEL INFECTION

CURTIS R. JACKSON
Plant and Soil
Vol. 23, No. 2 (October 1965), pp. 203-212
Published by: Springer
Stable URL: http://www.jstor.org/stable/42932137
Page Count: 10
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PEANUT-POD MYCOFLORA AND KERNEL INFECTION
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Abstract

The mycoflora in soil clinging to dry pods of peanuts of the Spanish variety Argentine was sampled in 2 experiments by serially washing pods for increasing periods in changes of sterile water. Of the 9 principal fungi found, Aspergillus niger, A. flavus, A. terreus, Rhizopus spp. and Sclerotium bataticola were present initially in relatively small numbers and decreased rapidly in subsequent dilutions. This decrease paralleled a decrease in weight of suspended material and in percentage of soil and organic particles greater than 0.016 mm in size. Penicillium funiculosum, P. rubrum, P. citrinum, and Fusarium spp. were found in large numbers and increased or slowly decreased in numbers in subsequent dilutions. In some instances variations in numbers followed trends of percentages of soil and organic particles less than 0.016 mm in size. When dry pods with this known mycoflora were allowed to hydrate over a 6-day period at 26°, 32°, or 38°C, there was extensive pod penetration and kernel infection by A . niger, A . flavus, S. bataticola and Rhizopus spp. but not by other fungi. The degree of A. flavus and A. niger infection increased with increasing temperatures.

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