Effect of ammonium carbonate and sodium bicarbonate on anthracnose of papaya |
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Authors: | Email author" target="_blank">D?SivakumarEmail author N?K?Hewarathgamagae R?S?Wilson Wijeratnam R?L?C?Wijesundera |
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Institution: | (1) Postharvest Technology Group, Industrial Technology Institute, Colombo 7, Sri Lanka;(2) Dept. of Botany, University of Colombo, Colombo 3, Sri Lanka |
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Abstract: | Colletotrichum gloeosporioides is the causal organism of anthracnose inCarica papaya L. (papaya, papaw). The effect of ammonium carbonate (3%) or sodium bicarbonate (2%) in aqueous solution or when incorporated
into a wax formulation on anthracnose severity in inoculated or naturally infected fruits was examined. Both salts had significant
effects, but that of ammonium carbonate was greater than that of sodium bicarbonate in controlling anthracnose. Ammonium carbonate
(3%) incorporated into the wax formulation effectively reduced anthracnose incidence by 70% in naturally infected papaya and
extended the storage life by maintaining the firmness, color and overall quality of the fruit in low temperature storage (13.5°C)
and 95% r.h. for 21 days followed by 2 days under marketing conditions. The mode of action of ammonium carbonate on the control
of anthroacnose appears to bevia complete inhibition of radial mycelial growth and conidia germination.
http://www.phytoparasitica.org posting Aug. 14, 2002. |
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Keywords: | Colletotrichum gloeosporioides anthracnose ammonium carbonate sodium bicarbonate Carica papaya papaya papaw |
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