FUMIGATION OF PEANUT SEEDS WITH ACETIC ACID VAPORS FOR CONTROLLING STORAGE FUNGI

Ismail,, Badeaa R.; Abd-EI-Kareem, F.

doi:10.21608/jpp.2004.238680

FUMIGATION OF PEANUT SEEDS WITH ACETIC ACID VAPORS FOR CONTROLLING STORAGE FUNGI

Document Type : Original Article

Authors

Dept. of Plant Pathology, National Research Centre-Dokki- Egypt

10.21608/jpp.2004.238680

Abstract

Isolation from diseased peanut seeds showed that Aspergillus flavus, A
parasiticus and A. ochraceus were the most dominant fungi associated with tested
seeds and the frequency of their occurrence were 63.5.27.4 and 7.9 % respectively.
Acetic acid vapors at 4.0 1-1111 caused complete inhibition for A flavus and A.
parasiticus and, at 6.0 1-1111 for A ochraceus in vitro.
In vivo , under natural infection ,acetic acid vapors at 150 1-1111 completely
inhibit fungi associated with peanut seeds. High reduction in infected seeds was
obtained with acetic acid vapor at 125 and 100 1-1111 ,which reduced the infection
by 85.8 and 73.7 % respectively, as compared with untreated seeds. Moderate
effect was obtained with concentration at 751-11/1 which reduced the natural infection by
61.9%. Peanut seeds were artificially inoculated individually with spore suspension
( ,.' spores/ml) of A flavus, A . parasiticus or A ochraceus, then stored for 7
days. Inoculated seeds were fumigated with different concentrations of acetic acid
vapors, in fumigation chamber. Results indicate that acetic acid vapor at 40.0 1-111111
completely inhibit A. flavus and A. parasiticus infection of peanut seeds and at
50.01-1111 for Aochraceus. Higher reduction was obtained with acetic acid vapor at
30.0 1-1111 lit reduced the artificial infection more than 69.7% for all tested fungi as
compared with unfumigated seeds. While acetic acid vapors at 20.01-1111 has
moderate effect.
It can be suggested that acetic acid vapors might be safely used
commercially for controlling storage fungi of peanut seeds ..

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