Allergic rhinitis region to region; in general, the tiny, hardly visible pollens of wind-pollinated plants are the predominant cause. Pollens of insect-pollinated plants are too large to remain airborne and pose no risk. Examples of plants commonly responsible for hay fever include: Allergic rhinitis may also be caused by allergy to Balsam of Peru, which is in various fragrances and other products. Allergy testing may reveal the specific allergens to which an individual is sensitive. Skin testing is the most common method of allergy testing. This may include a patch test to determine if a particular substance is causing the rhinitis, or
Double Allergic space. Powderfinger spent less money producing "Double Allergic" than on their previous works. Previously, the band had worked with Tony Cohen, whom Fanning stated was expensive due to his success in the industry. For "Double Allergic" the band chose Tim Whitten, a less well known producer, and because the band knew what they intended to do as they entered the studio they managed to spend less despite the improved sound. Middleton commented on Whitten's capabilities in the recording studio, saying "He's what a band looks for in a producer/engineer, because he's got his own ideas", but stating that Whitten would