ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Studies on fungi associated with tomato fruits and effectiveness of some commercial fungicides against three pathogens.

Abdel-Mallek, A. Y.; Hemida, S. K.; Bagy, M. M. K.;

Mycopathologia Year: 1995 Vol: 130 Issue: 2 Pages: 109-116 Ref: 30 ref.

1995

บทคัดย่อ

Among 39 fungal species and 1 variety belonging to 16 genera isolated from 116 healthy tomato fruits collected from markets in Assiut, Egypt, during 1994, Aspergillus niger was the most prevalent (84.6% of samples). Of 11 species recovered from 156 diseased tomatoes, Alternaria alternata, Rhizopus stolonifer and A. niger were the most common (52.7%, 35.9%, and 25.0%, respectively). Experiments for comparison of the effects of medium containing tomato juice with synthetic medium on mycelial growth of 9 fungal species indicated that the tomato juice medium was more suitable for growth of all the fungal species. The effect of 5 commercial fungicides and sodium hypochlorite when applied as postharvest dips after inoculation was studied in the lab. against A. alternata, A. niger and R. stolonifer. At 10 and 100 micro g/ml, none of the fungicides tested caused a noticeable inhibition of Alternaria rot. At 1000 micro g/ml, benomyl (as Benlate), iprodione (as Rovral) and procymidone (as Sumisclex) compl

etely prevented Alternaria and Aspergillus rot, whereas zineb + maneb + copper oxychloride (as Cuprosan) and metalaxyl (as Ridomil) were ineffective against A. niger. Rhizopus rot development was inhibited by >50% with one treatment of iprodione at 1000 micro g/ml. Sodium hypochlorite had good curative properties against fruit rots, especially, A. alternata and A. niger.