INVESTIGADORES
SENDIN Lorena Noelia
congresos y reuniones científicas
Título:
Use Of Methanolic Extracts Obtained Of Strawberry Leaves For The Control Of Postharvest Diseases In Lemons
Autor/es:
SENDÍN LORENA; MAMANÍ DE MARCHESSE ALICIA; FILIPPONE PAULA; TORRES LEAL GUILLERMO; CASTAGNARO ATILIO; DÍAZ RICCI JUAN
Lugar:
Agadir Morocco
Reunión:
Congreso; 10th International Citrus Congress; 2004
Institución organizadora:
International Society of Citriculture
Resumen:
The economic losses caused for the postharvest decay represent one of the major
problems of the citriculture worldwide. The control of these diseases is carried out mainly
with synthetic fungicides which cause accumulation of toxic wastes and environment
contamination problems. One plausible environmentally safe alternative would be the use
of natural antimicrobial compounds. The objective of the present study is to utilize
methanolic extracts of strawberry leaves with antifungal activity for to explore their
possible application on postharvest decay of citrus.
Leaves of commercial and wild species of strawberries were lyophilized, ground
and homogenized in methanol 80% for 24hs. The extracts were then filtered, dried and
suspended in water. In vitro assays against Pennicilium digitatum carried out with a
conidial suspension (1.5x105 conidia/ml) in soft potato-dextrose-broth medium at 28ºC for
24hs, indicated that the extract from the cv. Camarosa was the most active, therefore it was
used for in vivo experiments with lemons. Fruits were pretreated with hypochloride 1% and
inoculated with a suspension of P. digitatum (105 conidia/ml) by puncture-wounding. After
24hs lemons were sprayed with the Camarosa extract at 10 and 20% and incubated 21 days
at 25ºC and 90% RH. Lemons treated with Imazalil (0.2%) were used as the positive
control. Results showed that lemons treated with the extract of Camarosa at 20% did not
present disease symptoms and the extract at 10% produced a substantial decrease of the rot
in comparison with the controls without treatment. These outcomes suggest that it is
possible to use methanolic extracts of strawberry leaves for the postharvest decay in
lemons; with the consequent economic advantage and the protection to environment.