Black spot of rose

Black spot disease is serious threat to rose production in India. Black spot of rose caused by Marssonina rosae (Lib.) Lind. with its perfect stage Diplocarpon rosae (Wolf) causes heavy losses to roses worldwide. Therefore preliminary investigations were undertaken with the objective to record the outbreak of black spot of rose in Solan and Sirmour districts of Himachal Pradesh, India.

3p angicungduoc8 07-11-2020 15 2   Download

The phylloplane and rhizosphere microbes of rose cv. Edward was isolated and nine bacteria were selected to observe their antagonistic efficacy against Diplocarpon rosae causing blackspot disease in rose. The per cent inhibition of mycelial growth of the fungi by bacterial isolates was observed. The bacterial isolates PB1 and PB2 recorded 100 per cent inhibition followed by SB1, PB2 and SB2 isolates.

10p caygaocaolon6 30-07-2020 19 1   Download