A note on the relationships between the distance from a point inoculum source, weather variables and the air dispersal of Phaeosphaeria spp. ascospores in warmer and cooler sub-periods of a growing season

摘要

The effect of different distances from the inoculum source on the density of the down-windborne ascospores of Phaeosphaeria spp. was insignificant. Numbers of ascospores near the inoculum source and at a distance as far as 50 m were found to be similar. The air dispersal of ascospores was significantly influenced individually by each of the weather variables (rainfall, relative air humidity, air temperature) as well as by some of their interactions. The rainfall, air temperature, relative air humidity, and second-degree interactions between the weather variables influenced the air dispersal of Phaeosphaeria spp. ascospores, depending on a sub-period of the growing period. Regression models assembled for specific sub-periods were of a reasonable predicting capacity.