Among the five different evaluated locations, samples from Rasht
and Zeybakenar had the most contamination to rice seed-borne fungi,
and the most severity fungi were A. flavus and A. niger (Table 3). Reddy
et al. [27] stated that weather conditions before harvesting could be the
most important factors that led to invasion of fungal species. Mosa-
Nejad et al. [28] reported that the rate of precipitation, daily minimum
humidity, daily maximum temperature and sunshine hours could be
the most important factors affecting the distribution of rice blast in
Guilan province so that suitable climatic conditions could considerably
help to spore population of blast fungi and occurrence of blast
disease in farm during seven to ten days after occurrence of suitable
conditions. Aghili et al. [29] by study on the rice fungal contamination
in Mazandaran province stated that increasing average humidity in
the west of Mazandaran could be the reason for the severity of fungal
contamination of the seeds. Also, the results showed that under high
humidity conditions, fungi of genus Aspergillus had the most severity
which corresponded with the obtained results in this research