Articles
EFFECT OF EXCESS WATER ON THE INCIDENCE OF TRANSLUCENT FLESH DISORDER IN MANGOSTEEN (GARCINIA MANGOSTANA L.)
Article number
575_96
Pages
813 – 820
Language
English
Abstract
A problem limiting profitable mangosteen production in southern Thailand is the occurrence of translucent flesh disorder (TFD), caused by heavy-rainfall during pre-harvest.
To investigate this impact, an experiment was conducted under field conditions.
Four treatments were arranged as follows: 1. rewatering to field capacity by sprinkler system when soil water potential fell to -100 kPa (T1), 2. daily sprinkler irrigation (30 L hr-1) for 10 hours (T2), 3. heavy rain simulation by daily sprinkling (60 L hr-1) above and inside the tree canopy for 10 hours (T3), and 4. control, where the trees were exposed to naturally occurring rainfall conditions (T4). With 4 replicates in each treatment, 16 trees aged 13-years were used.
Trees in T1, T2 and T3 were under a wooden structure that was roofed with transparent plastic sheeting.
The treatments were started at 9 weeks after blooming.
The results showed that the highest percentage of translucent flesh disorder fruits occurred in T3 (60.5%), and this result was significantly different from T2 (23.7%), T4 (7.0%) and T1 (0%), respectively.
Under severe conditions of excess water in T3, fruit cracking was concurrently found in fruits with translucent flesh disorder.
Although there was no translucent flesh disorder fruits in T1, 87.7% of the harvested fruits suffered from gamboge disorder (GD), which may have been due to sudden increase in soil moisture.
To investigate this impact, an experiment was conducted under field conditions.
Four treatments were arranged as follows: 1. rewatering to field capacity by sprinkler system when soil water potential fell to -100 kPa (T1), 2. daily sprinkler irrigation (30 L hr-1) for 10 hours (T2), 3. heavy rain simulation by daily sprinkling (60 L hr-1) above and inside the tree canopy for 10 hours (T3), and 4. control, where the trees were exposed to naturally occurring rainfall conditions (T4). With 4 replicates in each treatment, 16 trees aged 13-years were used.
Trees in T1, T2 and T3 were under a wooden structure that was roofed with transparent plastic sheeting.
The treatments were started at 9 weeks after blooming.
The results showed that the highest percentage of translucent flesh disorder fruits occurred in T3 (60.5%), and this result was significantly different from T2 (23.7%), T4 (7.0%) and T1 (0%), respectively.
Under severe conditions of excess water in T3, fruit cracking was concurrently found in fruits with translucent flesh disorder.
Although there was no translucent flesh disorder fruits in T1, 87.7% of the harvested fruits suffered from gamboge disorder (GD), which may have been due to sudden increase in soil moisture.
Authors
S. Sdoodee, S. Limpun-Udom
Keywords
Mangosteen (Garcinia mangostana L.), pre-harvest, rainfall, fruit crack, gamboge disorder, translucent flesh disorder
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