Triệu chứng The earliest evidence of infection occurs shortly after pollination of the flowers. Infected spikelets appear greasy with a dark green cast. The seed coat is undamaged, but the inside has been replaced by a black powdery “bunt ball”. These kernels are about the same shape and size as
Common Bunt of Wheat
Nấm
Triệu chứng
The earliest evidence of infection occurs shortly after pollination of the flowers. Infected spikelets appear greasy with a dark green cast. The seed coat is undamaged, but the inside has been replaced by a black powdery “bunt ball”. These kernels are about the same shape and size as usual, but are gray-brown in color. When squeezed, they reveal a mass of black spores that smell like rotting fish. Infected wheat plants may be slightly shorter than healthy plants. Their heads may have shorter awns, or even no awns. Usually, all grains of a spike are affected, but possibly not all spikes on a plant are infected.
