Optimal transport conditions
Blueberries are packed in open boxes or crates on the farm or packhouse in close distance to the farm. Timely transport to the farm or packhouse with pre-cooling facility is necessary as quickly obtaining a low temperature is essential for the keeping quality of blueberries. Pre-cooling of the product, usually to a temperature between 0 and 0.5 ºC, is absolutely necessary before the product enters the refrigerated truck for further transport. Blueberries for distant (export) markets are mainly shipped by sea due to their shelf life of up to 3 months, depending on their ripeness. Blueberries are often sorted and re-packed into smaller packages shortly before retail.
Attention points during loading and transport
Loading at the farmWhen collecting at the farm, the crates or other packages must be carefully stacked and tightened to ensure that they do not shift or fall over during transport. Ideally, the crates fit well between the sides of the truck. For larger trucks and for loads that do not fully occupy the truck floor, tightening must be done by placing (pallet-)edge protectors at the edges of a batch of stacked packages.
Loading after pre-coolingThe loading must be realized preferably from a climate-controlled loading dock via “cold tunnels” into the truck or reefer. This prevents ambient air from entering the pre-cooled reefer container or truck or the climate-controlled loading dock. Aside from maintaining the blueberries at the desired low temperature, this is important in order to avoid condensation, which will occur when warm moisture-laden air enters the reefer container or truck. Higher humidity or condensation may encourage the growth of moulds.
Temperature loggingThe cold chain should not be broken and is best contained in the range of 0 to 0.5 ºC. Lower or higher temperatures can easily result in loss of quality. Cooled blueberries that are re-warmed when the cold chain is broken may have condensation on the fruit. This will increase their susceptibility to fungal decay. Good quality control during transport includes temperature logging.
Unloading at place of destinationUnload carefully to avoid handling damage. The pallets (or other packaging) with blueberries must be moved directly to a cold storage room. It is recommended to sample fruits for inspection at this point. Visual appearance of blueberries, but also of packaging and pallets can be documented by means of photos.