Page Banner

United States Department of Agriculture

Agricultural Research Service

Title: Prevention of Fungal Colonization on Wounds of Almond and Pistachio Nut-Fruits by Yeast in Orchards

Authors
item Hua, Sui Sheng
item Sarreal, Siov
item Fang, Li Tai - WRRC, STUDENT VOLUNTEER
item Chen, Tom - WRRC, STUDENT VOLUNTEER
item Cancio, Christina - WRRC, STUDENT VOLUNTEER
item Singh, Harpree - WRRC, STUDENT VOLUNTEER

Submitted to: Aflatoxin Workshop
Publication Type: Abstract Only
Publication Acceptance Date: October 25, 2004
Publication Date: N/A

Technical Abstract: Colonization of A. flavus on wounded nut-fruits was 27.1% for the control and 5.1% for the yeast treated nut-fruits respectively. The colony forming unit (CFU) of A. flavus from each infected nut-fruit was enumerated. Average spore production of A. flavus from infected nuts was 5.6x106 and 1.3x106 respectively for the control and yeast sprayed. The total number of A. flavus spores from all infected nut-fruits of the control group was 1.2x108. In contrast the total number of A. flavus spores from the yeast sprayed nut-fruits was only 6.2x106. The results clearly demonstrated that P. anomala prevented colonization of A. flavus on wounds and modulate spore production on infected wounds. A reduction of fungal colonization was observed for the almond nut-fruits sprayed with yeast cells. One can anticipate that field spraying of this effective yeast to tree-nuts may decrease the population of A. flavus in orchard environments. Thus, P. anomala is likely to provide an economical means of managing aflatoxin contamination.

Last Modified: 7/31/2014