Effects of Temperature and Bio-product Prototype from Antagonistic Bacteria <I> Bacillus siamensis </I> RFCD306 on Quality and Storage Life of Longan Fruit cv. Daw
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Abstract
The objective of this research was to examine the effects of temperature and bio - product (rice starch - 2 formulation) from Bacillus siamensis isolate RFCD306 (rate 0.5 g / 100 ml) on quality and storage life of longan fruit cv. Daw. The experimental design was a completely randomized design (CRD) with 6 treatments:T1) fruits were neither sprayed with water nor biocontrol product and stored at ambient temperature (29.75 ± 0.67 ºC, 66.75 ± 0.82 %RH), T2) fruits were sprayed with water and stored at ambient temperature (29.75 ± 0.67 ºC, 66.75 ± 0.82 %RH), T3) fruits were sprayed with biocontrol product and stored at ambient temperature (29.75 ± 0.67 ºC, 66.75 ± 0.82 %RH), T4) fruits were neither sprayed with water nor biocontrol product and stored at 15 ºC and 75 %RH (15.06 ± 0.09 ºC, 73.38 ± 1.21 %RH), T5) fruits were sprayed with water and stored at 15 ºC and 75 %RH (15.06 ± 0.09 ºC, 73.38 ± 1.21 %RH), and T6) fruits were sprayed with bio - product and stored at 15 °C and 75 %RH (15.06 ± 0.09 ºC, 73.38 ± 1.21 %RH) for 2 days. The results showed that longan sprayed with biocontrol product and stored at 15 ºC and 75%RH could reduce fresh weight and pulp dry weight loss. Moreover, the treatment could slow down the off-odor, discoloration of peel, and vitamin C contents. In addition, fruits sprayed with biocontrol product and stored at 15 ºC and 75 %RH had the highest overall acceptability resulting in the longest shelf life of 13.20 ± 0.49 days. However, biocontrol product and storage temperature had no effect on peel dry weight and total soluble solids of longan fruit.
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