This first appeared as “Spotlight on Ornamentals: A Thousand and One Arabian Rose Trees?” in the IR-4 Newsletter 46(4):4. Plant Information Throughout the world there are more than 1,000 known species of Rhododendron, or “rose trees” as directly translated from ancient Greek. Commonly known in cultivation as azaleas, Rhododendron species are grouped with ericaceous plants […]
Category: Environmental Horticulture Program
Aphid Efficacy Literature Review & Summary – 2015
In the past, IR-4 had conducted Ornamental Horticulture Surveys to poll growers, landscape care operators, researchers, extension personnel and others
Ametoctradin + Dimethomorph Crop Safety – 2015
Orvego, registered with EPA on May 21, 2012 is a combination of ametoctradin (FRAC 45) and dimethomorph (FRAC 40). In 2012, IR-4 started testing Orvego (ametoctradin +
Acibenzolar Crop Safety – 2015
Acibenzolar is an active ingredient that stimulates plant defense systems. In 2002, IR-4 started testing acibenzolar for safety on several ornamental horticulture crops. In 2008, IR-4 continued
Acetic Acid Crop Safety – 2014
From 2010 to 2013, IR-4 completed 38 trials on WeedPharm (acetic acid). The data contained in this report was generated to register uses of active ingredient on and around ornamental
Ammonium Nanonoate Crop Safety – 2014
From 2010 to 2013, IR-4 completed 24 trials on Racer (Ammonium nonanoate). The data contained in this report was generated to register uses of active ingredient on
Crop Vignette: Geraniums and Pelargoniums
This first appeared as "Spotlight on Ornamentals: Geraniums? Pelargoniums? What's the difference?" in the IR-4 Newsletter 45(1):5. Plant Information Geraniums and pelargoniums are often confused with each other. And it is very easy to do since the flower is widely grown as a bedding plant and in containers which are known as 'geranium', but its [...]
Crop Vignette: Bulb and Corm Crops
This article first appeared as "Spotlight on Ornamentals: Time to Think Spring!" in IR-4 Newsletter 44(3):5 Plant Information Crocus and other early spring flowers are the harbingers of warmer days after a cold winter. Easter lilies and hyacinths commonly are given to celebrate the spring holidays. Daffodils, tulips and Frittilaria brighten up an otherwise dull [...]
Crop Vignette: Cyclamen
This first appeared as "Spotlight on Ornamentals: Cyclamen - The Persian Violet" in the IR-4 Newsletter 42(4):10 Plant Information With ethereal blooms hovering above heart-shaped, variegated leaves, cyclamen almost glows in wintry light. Cyclamen, originating in the Mediterranean, is hardy to zone 7, and, although it can be grown outside in some areas of the [...]
Crop Vignette: Chrysanthemums
This first appeared as "Spotlight on Ornamentals: It's Mum Season" in the IR-4 Newsletter 41(4):13. Plant Information Blooming in September through November and with the prevalence of orange, red, gold and yellow cultivars, chrysanthemums are the epitome of fall. As the third largest single ornamental horticulture pot crop (behind orchids and poinsettias), mums possess an [...]