บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Development of the sanitary condition of sunflower seeds. Consequences of attacks on the capitula by Phomopsis helianthi and Phoma macdonaldi.

Fayret, J.; Quenin, H.; Perny, A.;

Phytoma Year: 1996 Issue: No. 487 Pages: 37-40 Ref: 10 ref.

1996

บทคัดย่อ

Development of the sanitary condition of sunflower seeds. Consequences of attacks on the capitula by Phomopsis helianthi and Phoma macdonaldi.

The fungi associated with sunflower capitula collected in France in the autumn of 1994 were investigated, together with the sanitary conditions of seeds over a period of 6 months. Mycoflora included predominantly saprophytes Alternaria, Penicillium and Stemphylium (with no effect on seed germination) and pathogens P. helianthi [Diaporthe helianthi] and P. macdonaldi. Analyses of the fungi repeated over the storage period showed both pathogens to be present in husks and kernels from harvesting to the following spring. Both caused rapid necroses on plantlets germinating in vitro. When the seeds germinated in the absence of a nutritive substrate, only Phoma caused necrosis and produced numerous pycnidia. Under the experimental conditions, Phomopsis was not transmitted by contaminated seeds.