Phytopathology (1996) 86, p. S58 (Fuentes-Davila)

Guillermo Fuentes-Davila (1996)
Effect of using high levels of infected wheat seed for sowing, on the natural incidence of karnal bunt (Tilletia indica)
Phytopathology 86 (11 suppl.), S58-S58
Abstract: To determine the effect of sowing infected wheat seed on the natural incidence of kamal bunt, 500, 1000, 2500 and 5000 infected seeds/kg were used in experiments carried out on the same land during 1991-1994, in the Yaqui valley. A healthy treatment was included as a check. In 1991-92 the infected seed mean range per plot was 3906-5658. The greatest number of infected seeds was obtained with the treatment of 5000, while the untreated check plot had 3906. In 1992-93 the range was 238-1016, the check had the greatest number of infected seeds and the treatment with 5000 had the lowest. During 1993-94 disease incidence was very low and no infected seeds could be detected in any of the treatments. In 1994-95, the range was 1603-3048 and the highest number of infected seeds was found in the treatment with 1000, followed by the untreated check plot; the treatment with 5000 had 1603. The results obtained reflect the disease incidence that occurred during the 1991-1994 wheat cycles in the Yaqui valley. It corroborates that, in karnal bunt affected areas of northwestern Mexico, where soil is highly infested, using levels up to 5000 infected seeds/kg of seed does not influence incidence of kamal bunt.
Database assignments for author(s): Guillermo Fuentes-Davila

Research topic(s) for pests/diseases/weeds:
population dynamics/ epidemiology

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Tilletia indica	Wheat (Triticum)	Mexico