XDR
What is XDR? (eXtreme Disease Resistance)
- Best in class genetic performance under disease pressure.
- Rigorous, controlled testing for disease resistance in laboratory and field settings.
- Independent verification of testing and results by established authorities in the field.
Realities and expectations of disease resistant genetics
Our breeders at Syngenta Flowers have worked hard for decades to develop tools to combat those diseases and on how to make genetics more resistant to diseases like the ones named above. The fundamental understanding that there is no “silver-bullet” solution, but with the introduction of more resistant genetics we have another tool in the toolbox.
It is important to remember the difference between resistance and immunity. Immunity means that the plant is not subject to attack or infection by a specified pest. Resistant plants are still (lightly) affected by the disease but overcome it and restrict the development of the pest.
The basics of responsible disease management practices
For resistant genetics to thrive, proper use of chemistries is necessary. But it is crucial to understand the pathogens that a crop was specifically bred to resist and that “disease resistance” does not imply a resistance to all diseases it could get infected by.
Plant pathologists emphasize that to properly fight a disease; you must diagnose the specific pathogen first. This practice not only allows you to choose the proper chemical treatment but also the most appropriate genetics to produce.
A place for non-resistant genetics
We must realize that non-resistant genetics will keep having a place in our industry. They offer a wide range of colors, can be grown where the disease pressure is not as severe, and are an economical option for growers.
From packs for garden borders and landscape beds, to hanging baskets for home gardeners, the proper use of fungicides from propagation to finish, are essential to each consumer’s success. And with appropriate rotation tools, non-resistant genetics can still perform in the landscape for many weeks providing consumer satisfaction.
Recognizing the achievements, but always striving for improvements
The Syngenta Flowers Team is proud of large achievements in advanced disease resistant breeding and has gained attention in trials around the globe. Imara® XDR Impatiens first launched in the European market and sold out immediately at retail outlets around the United Kingdom.
Consumers were “taking back the shade” and were delighted to have a garden favorite on the retail shelves again. Imara® XDR Impatiens won the 2019 TASPO Award of the Year for Best Breeding Product and it was awarded for Best Ornamental Plant Introduction—Bedding by Horticulture Week Business Award in London in June 2019. Cora® XDR is currently the industry-leading disease resistant vinca around the globe.
Take Back the Shade!
- The first Impatiens walleriana with a high degree of resistance to downy mildew.*
- Proven landscape performance that fights back with reliable flowering all season long.
- Easy and economical to produce, with a compact branching habit ideal for high-density growing in packs and pots.
- A complete range of core and novelty colors in one disease resistant series.
The Vinca that Fights Back
- Reduced Risk: offers season-long flowering and survival in landscape plantings. Highly resistant to ten of the most virulent isolates of Phytophthora nicotianae that cause Phytophthora blight on annual vinca.*
- Easier to grow: improved branching, uniformity, and floriferousness ideal for premium packs and small to larger pots.
- Higher consumer appeal: large showy flowers in the widest range of solid and high demand bicolor patterns of any disease resistant vinca on the market.
* Confirmed in collaboration with Clemson University; these isolates were found at growers and in landscapes across the southern U.S.
Cora® XDR against Non-Resistant Competitor Varieties
Garden setting with NO fungicides applied to any varieties.
There's None Other Like It
- The only trailing vinca powered by high levels of resistance to multiple strains of aerial Phytophthora.
- The mounded, spreading habit is ideal for summer baskets, mixed containers, and large landscape beds.
- F1 hybrid uniformity and vigor build a premium package not found in other trailing vinca.
- Large, high-quality flowers completely cover plants creating blankets of color lasting all season long.
