Author Archives: Neil S. Mattson

About Neil S. Mattson

Neil Mattson is an assistant professor and floriculture Extension specialist in the Department of Horticulture at Cornell University. You can eMail him at

Ethylene In The Greenhouse

Plants exposed to high concentration (> 0.05 ppm) ethylene exhibit a range of familiar symptoms, such as leaf yellowing, epinasty or abscission, and flower senescence (see Figure 1) and abscission. Usually, low concentrations (< 0.05 ppm) of ethylene precede high concentrations. Imagine a slightly malfunctioning heater becoming progressively worse. So, plant symptoms of low concentration