While trekking, I prefer having fruits in the real form, not dried ones and no pulp or juices.
When carried without being squished fruits like apple, litchi and strawberries don't rot in a couple of days. But thats not the case for say citrus fruits like Orange, Sweet Lemon, Lemon or others like Grapes, Sapodilla, etc.
How would you carry these fruits that can rot over a period of two days?
One can ask a question why carry them? I do understand that you don't want to carry something that can rot. I am more keen about specifically Citrus fruits if not all of them are suitable, since the region I trek in, Oranges and Sweet Lemon are best suited fruits.
This question would typically limit to weather which isn't too extreme. (I agree, extremity differ heavily as we speak about various parts of the world, so I've simply added an ambient temperature range)
Temperature ranges: Maximum of 35 oC (95 oF) during the daylight, Minimum of 20 oC (68 oF) during early hours of the day and an hour before sunset. 7 to 10 oC (45 to 50 oF) during the night.