FORECAST OF FIRST DAY WHITE BIRCH POLLEN RELEASE WITHOUT TOOLS FOR OBSERVATION OF THE WHITE BIRCH

• Published in: JIBI INKOKA TEMBO Vol. 44; no. 6; pp. 471 - 475
• Main Author: Nishizawa, Shinji
• Format: Journal Article
• Language: Japanese
• Published: Society of Oto-rhino-laryngology Tokyo 2001
• Subjects: first day; forecast; leaves; pollen releasing; white birch

To forecast the first day of white birch (Betula platyphylla var Japonica) pollen release without tools, we examined the daily growth of leaves in addition to observing the trees at a distance, e.g. from a car or bus. Release began 3 days after leaves could be identified from sprouts. It also began...