While it's not common for food allergies to cause asthma symptoms, food allergies can cause a severe life-threatening reaction. The most common foods associated with allergic symptoms are:
Shrimp and other shellfish
Salads & fresh fruits
American Academy of Allergy Asthma & Immunology: "What is an Allergy/Asthma Specialist?" American Academy of Family Physicians: "Asthma: Questions to Ask When It Doesn’t Get Better?" Merck Source: "Questions to Ask Your Doctor."