How to Treat Karnal Bunt of Wheat | Karnal Bunt | What is Karnal bunt? Karnal bunt (Tilletia indica) is a fungus affecting grains of wheat, durum and triticale. It reduces grain quality through the production of masses of powdery spores that discolour the grain and grain products. It is recognised by a ‘dead fish’ smell. If Karnal bunt was detected in Australia, grain export markets would be affected, as many countries have import restrictions for this pest. Therefore, this fungus poses a major