Wednesday, April 28, 2021

Excalia released for treating apple scab

Nufarm, in partnership with Valent Canada, recently released Excalia, a new fungicide that controls apple scab and mildew and for sugar beets suppresses rhizoctonia crown rust and root rot.

It is a systemic fungicide that is taken into leaves and spread across their entire surface. The active ingredient is Indiflin.

“The key with most diseases is early season preventative treatment,” said Alicia Sebastian, horticulture sales specialist at Nufarm.

In apples, Excalia must be applied between green tip and petal fall. 

Excalia is highly active against the apple scab pathogen and it works to inhibit spore production, spore germination and actively growing fungi. 

For powdery mildew protection, Excalia must be applied with a silicone surfactant and it tank mixes well with other fungicides and foliar nutrients, the companies said.

Indiflin is a novel fungicide active ingredient discovered by Sumitomo Chemical, a Japanese company that started in fertilizers and diversified into agricultural chemicals.


Indiflin belongs to a class of compounds known as succinate dehydrogenase inhibitors (SDHI) that have a mode of action inhibiting energy production process in disease-causing fungi. 

Evaluations conducted in-house and externally have ascertained that it works well  against major plant diseases in the European region, such as brown rust on wheat, net blotch on barley, and black scurf on potatoes, as well as other diseases occurring on various crops in other regions. 

The company hopes to have it registered for use in European Union countries by 2023.