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Showing posts from September, 2022

Harvesting and using fallen apples and other produce - can it be done safely?

Annalisa Hultberg, Extension Educator, food safety Can you safely use apples and other crops that might fall to the ground before or during harvest? Is it safe to just wash off and then sell these crops? While it might be tempting to want to use the products so that they do not go to waste, produce that is dropped prior to or during harvest should not be distributed to the public for fresh eating, baking or in juice cider production due to the potential for the presence of patulin (in apples), and the risk of damage and internalized contamination in other produce. What happens when produce is dropped? When produce falls to the ground, damage such as cracks, bruises and other sometimes undetectable breaks in the surface of the produce skin or rind can occur. These cracks can cause the produce to be much more susceptible to infiltration during the washing step, such as with this cantaloupe pictured below. Dye was put into the water that the melon was submerged into.  You can see wher...

Grape harvest decisions ahead of frost or freeze

Author: Annie Klodd, Extension Educator - Fruit and Vegetable Production. kloddann@umn.edu Some areas of Minnesota are forecast to experience a frost or freeze tonight. This leaves grape growers debating whether to harvest today or leave the fruit on the vines. The goal of this article is to provide growers with information that they may use to help make their decision. University of Minnesota Extension is not responsible for an individual farm's decision - this information is for educational purposes only. A conservative estimate from Jorgensen et al. (1996) suggests that frost damage can be expected when temperatures dip below 31 degrees F.We do not have definitive data showing whether the berries of MN-bred grape varieties can withstand lower temperatures than other varieties. Therefore I am using this general, conservative threshold. There are two different types of frosts, advection and radiation. Just because a frost is predicted for a certain region of the state, that does n...