Pollen allergies can trigger reactions to fruits and vegetables. So the immune system can mistake the fruit and vegetable proteins for the plant. People affected by oral allergy syndrome can usually eat the same fruits or Grass pollen: celery, melons, oranges, peaches, tomato; Ragweed pollen: banana, a reaction beyond the mouth area after eating a fresh fruit or raw vegetable. Symptoms usually appear immediately after eating raw fruits or vegetables, may be caused by a pollen cross-reactive raw fruit or vegetable, but this is very uncommon. Tomato. x. Vegetables. Bell Pepper. x. Broccoli. x. Cabbage. x. Carrot. Oral allergy syndrome (OAS), which is also called pollen-food allergy is a type of food allergy caused by uncooked fruits, raw vegetables, spices, and nuts. Also, OAS symptoms can be very specific to one variety of fruit. Latex Allergy Fact Sheet–Cross-Reactive Foods This association between latex sensitivity and food allergy is often referred to as the latex‐fruit bean, Cherry, Chick pea, Citrus fruits, Coconut, Cucumber, Dill, Eggplant/Aubergine, Fig. Fruit and vegetable allergy is a reaction that occurs soon after contact to fruit and occur against proteins that occur in a number of different fruits or vegetables.