Fruiterers (fab word - the knack, ironically like banananana, is knowing when to stop) anyway, is there something specific to being a fruiterer, or do you just have to sell fruit? And why isn't it just fruiter?
No formal qualifications needed to be a fruiterer but you have to be able to carry large loads (as in sacks of potatoes), be good with maths to work out the costs when reselling. Also a knowledge of nutrition would be helpful but not a necessity and some colleges do run courses in all aspects of selling that might help with the job.
As for fruiterer if they were called a fruiter they would be a ship for carrying fruit and not a purveyor of it.