The survival of teliospores of Puccinia carthami Cda. present in a field which had been planted with safflower for three years was studied in the laboratory. Soil samples were collected monthly from November 1988 to November 1989 and the viability of soil-borne inoculum of P.carthami was estimated as the percentage of infected seedlings. Also, rainfall minimum amd maximum temperatures and relative humidity were recorded monthly. The incidence and severity of rust was high during the first four months immediately after harvest of the safflower crop and progressively decreased with time. Although rust was not completely eliminated, it was markedly lower after a year. Probably control of rust results from unfavourable effects of environmental conditions on the viability of teliospores present in soil and on the safflower debris of the previous crop.
Effect of environmental conditions on survival of soil-borne inoculum of Puccinia carthami CDA
ZAZZERINI, Antonio;TOSI, Laura
1992
Abstract
The survival of teliospores of Puccinia carthami Cda. present in a field which had been planted with safflower for three years was studied in the laboratory. Soil samples were collected monthly from November 1988 to November 1989 and the viability of soil-borne inoculum of P.carthami was estimated as the percentage of infected seedlings. Also, rainfall minimum amd maximum temperatures and relative humidity were recorded monthly. The incidence and severity of rust was high during the first four months immediately after harvest of the safflower crop and progressively decreased with time. Although rust was not completely eliminated, it was markedly lower after a year. Probably control of rust results from unfavourable effects of environmental conditions on the viability of teliospores present in soil and on the safflower debris of the previous crop.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
