APPEARANCE OF QUIESCENT FRUIT ROT FUNGI ON RAMBUTAN STORED AT 13°C AND 25°C

Mature rambutan fruits from major growing locations of Thailand : the East and the South, were collected and stored at 13°C and 25°C. Numbers of decayed fruits were recorded and fungal pathogens were isolated at various storing times.
Percentages of infected fruits observed at 13°C were 2.4. 5.9, 11.4, 19, 28.8. 44.2 and 56.6 while those of 25° C were 6.4, 12.9, 28.1, 45.1, 64.3, 84.5 and 98.4, respectively for 3, 5, 7, 9, 11, 14 and 17 days of storage.
That meant the fruits stored at 13° can last at least twice longer time than of 25°C.

Fungi isolated from fruit rot symptoms were Botryoidplodia theobromae, Colletotrichum gloeosporioides, Gliocephalotrichum bulbilium, Pestalotiopsis sp., Phomopsis sp. and the perfect form of Colletotrichum sp., Glomerella sp.
The appearances of B. theobromae, C. gloeosporioides and G. bulbilium were unaffected by storage temperatures.
Populations detected at 13°C and 25°C were 10.3 and 13.5 % for B. theobromae, 42.1 and 43.4 % for C. gloeosporioides, 2.9 and 3.4 % for G. bulbilium, respectively.
Population of Pestalotiopsis sp. detected at 13°C was higher than at 25°C (21.9 and 11.9 %, respectively). But the detected populations of Phomopsis sp. were opposite, they were 22.7 and 30.4% at 13°C and 25°C, respectively.
Severe infection was observed for B. theobromae and C. gloeosporioides.

Frontier in Tropical Fruit Research

U. Farungsang, S. Sangchote, N. Farungsang

https://doi.org/10.17660/ActaHortic.1992.321.115