Onyemachi, Felix C .
Post-Harvest Deterioration of Seeds of Tropical Crops.
When seasonally grown crops are needed for all year round consumption, their seeds have to be properly protected against deterioration during storage in the interval between two cropping seasons.
Storage deterioration is brought about by endogenous physiological processes or by attack of specially fungi and bacteria encouraged by high moisture content both of which may be aggravated by physical damage due to the delicate nature of their external covering. It is well documented that seeds are invariably infected by fungi while in the field, and these contaminants are carried into storage. This group of myco-flora is referred to as field fungi.
Many of the field fungi will persist in the stored products and inflict considerable damage. The destruction they cause is aggravated by the action of fungi, which invade the products after harvesting. This second group of contaminants is called storage fungi.
The degree of occurrence of any fungal species throughout the storage period is determined by the nature of the substrates, the environmental conditions and interaction among the invading species.
A major problem in using the seeds of many tropical trees in planting is the short storage life of their seeds. Sometimes it is not even possible to store seeds from harvest until the next sowing season. Indeed, for some it is hardly possible to maintain viability during collection and transportation. Improved methods for short- or medium- term storage and for handling are required to enable the use of these species between two cropping seasons.
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1 - university of the Gambia, Agricultural and Biological Sciences, P.o.Box 3530, P.box.3530, Banjul, Banjul, 00220, The GAMBIA
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B U S Y.
Presentation Type: Oral Paper:Papers for Sections
Location: Lake Erie/Hilton
Date: Tuesday, July 10th, 2007
Time: 4:45 PM