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Dr. P. Mukherjee, FBS
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Department of Botany
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The Biobrio 2(1&2), 2015

STUDIES ON EFFICACY OF DIFFERENT CHEMICAL TREATMENTS AGAINST BACTERIAL LEAF BLIGHT OF RICE IN BIHAR

Swati, Arvind Kumar, S. P. Roy and Puja Kumari

ABSTRACT:

Bacterial leaf blight (BLB) of rice caused by Xanthomonas oryzae pv oryzae is emerging as serious threat to rice production worldwide, including India & its state of Bihar. Keeping in view enormous losses caused by this disease an attempt has been made to control this disease through chemicals. The present study was aimed to find out the best chemical control of Bacterial Leaf Blight disease of rice. Five chemicals i.e. Tricyclazole 75 WP (Beam), Propiconazole 25 EC (Tilt), Kresoxim methyl (Ergon 44.3 SC), Azoxystrobin 25 SC (Amistar) and Carbendazim 50 WP (Bavistin) were tested for this purpose. While observing the effect of different chemicals on growth of Xanthomonas oryzae pv. oryzae in vitro maximum zone of inhibition was recorded in case of Tricyclazole 75 WP (Beam). Among five seed dressing chemicals Tricyclazole 75 WP (Beam) proved to be the most effective seed dressing bactericide in minimizing the disease intensity and maximizing the grain yield. Bactericides were sprayed as foliar sprayer, treatment wise. Seed treatment with Tricyclazole @ 3 g/kg and 3 sprays with Tricyclazole @ 0.06 % (tillering, boot and flowering stages) proved to be the most effective treatment in which the least disease intensity and highest yield was recorded.

Keywords:    Xanthomonas oryzae pv oryzae, Rice (Oryza sativa), Bacterial Leaf Blight (BLB)



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