@entity579 brown spot is one of the important diseases in the world including Iran. 91 samples of the infected plants such as leaves and panicles were collected from different locations of Guilan province, North of Iran and the fungi isolated and studied for pathogenicity. Three species of Bipolaris (B. oryzae, Bipolaris sp. and B. cf. victoriae) were isolated more than other species with serious effects on the plants respectively. Reactions of 8 cultivars of @entity579 , Neda, Nemat, Sepeed-rood, Bejar, Khazar, Domsephid, Hassan-saraee and Binam were studied in greenhouse to Bipolaris sp. and B. cf. victoriae in two stages of growth, on leaves and panicles, respectively. The results showed that in seedling stage on leaf there was no significant difference between these cultivars in case of @entity281 rates. In heading stage, although there was no significant difference according to variance analysis, but according to Duncan test (5%) they could be divided into 3 groups. Neda, Sepeed-rood, Khazar and Binam, with the lowest @entity281 rate, were in the first group Bejar, Domsephid and Hassan-saraee were classified into the second group and Nemat was in the third one. Curvularia sp., Nigrospora sp., @entity9456 and Alternaria sp. were with minor prevalence in @entity281 of the plants.

XXXX brown spot and susceptibility of some cultivars in north of Iran.

@entity281 :: ('MESH:D007239', 'Disease') :: ['infection'] @entity9456 :: ('148305', 'Species') :: ['Pyricularia grisea'] @entity579 :: ('4530', 'Species') :: ['rice', 'Rice']
@entity579 :: (4530,Species) :: ['Rice']
