Broadform™ Fungicide Consistently Demonstrates Strong Control of Botrytis and Other Diseases

Broadform fungicide consistently demonstrates strong control of Botrytis and other diseases important to the greenhouse industry – including leaf spots, powdery mildew, and black spot of rose – in both internal trials and trials conducted with university cooperators. 

The dual modes of action in Broadform, provided by the combination of fluopyram, an SDHI, and trifloxystrobin, a QOI, deliver long-lasting disease management and act quickly to control disease preventively. Due to its concentrated formulation, trials have shown that rates of Broadform as low as 4 oz./100 gal. provide excellent Botrytis control (Fig. 1. Botrytis trial on Geranium).


Fig. 1 Botrytis trial on Geranium. 
Left – Untreated; Right – Broadform 4 oz./100 gal. 
Photo Courtesy of Chase Agricultural Consulting, 2018

Fig. 2 Anthracnose trial on Cyclamen. 
Left – Untreated; Right – Broadform 4 oz./100 gal. 
Photo Courtesy of Chase Agricultural Consulting, 2018

In trials side-by-side with key competitors the Botrytis activity provided by fluopyram is particularly apparent (Graph 1), with even the lowest label rate of Broadform providing nearly 100% control. 

Beyond overall disease control, Broadform also reduces sporulation from active lesions (Graph 2), which can prevent spread of the pathogen throughout the greenhouse. 

The fluopyram component of Broadform has a unique structure compared to other SDHIs, and multiple peer-reviewed studies have demonstrated that strains of the Botrytis pathogen resistant to one or more SDHI chemistries maintain sensitivity to fluopyram. While it is still a member of FRAC group 7 and should be rotated with chemistries from other FRAC groups, this means that Broadform is a potential solution in situations where other SDHIs no longer provide effective suppression of Botrytis. 

Beyond Botrytis, Broadform has performed very well in trials against powdery mildew black spot of rose, anthracnose (Graph 3; Fig. 2. Anthracnose Trial on Cyclamen), Rhizoctonia stem rot, and leaf spots caused by species of Septoria and Alternata. With this spectrum of activity and the introduction of a new active ingredient to the industry with fluopyram, Broadform will be an excellent new disease management option for greenhouse ornamentals production. 

 How it performs

 Graph 1: Botrytis on Geranium

A. R. Chase – Chase Agricultural Consulting; 2018, 14d spray interval 
Area under the disease progress curve (AUDPC) measures disease across the duration of a trial.

 Graph 2: Botrytis on Geranium

Janna Beckerman – Purdue University; 2017 
7d spray interval

 Graph 3: Anthracnose on Cyclamen

A. R. Chase – Chase Agricultural Consulting, LLC.


Renee Rioux

by Renee Rioux , Ph.D., Product Development Manager, ES

Tuesday, June 12, 2018