Effect of aqueous extracts of some indigenous medicinal plants on sheath blight of rice

Abstract

Aqueous extract of some indigenous plant parts were evaluated for its efficacy to control sheath blight of rice. Six treatments were applied, viz. T1-control (water spray), T2-Tulsi (Ocientific tenuiflorum) extract (1:10), T3-Nishinda (Vitex negundu) extract (1:10), T4-Thankuni (Centella asiatica) extracts (1:10), T5-Biskatali (Polygonum hydropiper) extract (1:10) and T6-Proud (Propiconazole @ 0.2%) as a positive control. Effect of these plant extracts on percent tiller infection and percent relative lesion height of sheath blight of rice cultivar BRRI dhan 49 was determined at 55, 75 and 95 day after transplanting (DAT). Number of infected tillers per hill differed significantly among the different treatments. The highest number of infected tillers was observed in control treatment. The lowest and statistically similar number of infected tillers was found in fungicide, Proud (Propiconazole)-and Biskatali-treated plots. Reduced number of infected tillers was observed in Tulsi, Thankuni and Nishinda. Highest percent tiller infection was recorded in control and lowest percent tiller infection was recorded in Proud and Biskatali, which were statistically similar. Nishinda, Tulsi and Thankuni had reduced tiller infection in compare to control. Percent reduction of tiller infection over control was achieved by proud followed by Biskatali. The highest lesion height was observed in control and lowest lesion height was found in Proud followed by Biskatali. The highest percent relative lesion height was recorded in control followed by Thankuni. The lowest percent relative lesion height was recorded in Proud preceded by Biskatali. Highest percent reduction of relative lesion height over control was achieved by proud followed by Biskatali. Thus, plant extracts of Biskatali, Tulsi, Nishinda and Thankuni are effective to control sheath blight of rice. Among the plant extracts, Biskatali showed highest control of sheath blight disease of rice.

Integrated Management of Seed Borne Pathogenic Fungi Of Brri 29 Rice Variety

“…The results of this investigation showed similarity with the findings of Hossain and Mia (19) , Ashrafuzzaman et al (20) , Islam and Monjil (21) , Gohel and Chauhan (22) and Balgade and Gaikwad (23) . Hossain and Mia (19) observed two foliar sprays with Aimcozim, Bavistin, Shincar and Tilt at 0.1% and two top dressing of MP with 40kg/ha caused significant reduction of tiller infection of sheath blight disease.…”

“…The highest yield of rice was recorded in plants with the combined doses. Islam and Monjil (21) detected complete inhibition of sheath blight pathogen when treated with four indigenous medicinal plant extracts i.e. tulsi, nishinda, thankuni and biskatali and also reported germination failure due to fungal infection.…”

“…Lots of researches have been done on rice grain pathogens and its management (8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18) . But information on integrated management of rice seed borne pathogens is insufficient (19)(20)(21)(22)(23)(24) . By keeping in view the above mentioned facts, an integrated programme was aimed to control rice seed borne pathogens.…”

Comparative efficacy of garlic, BAU-biofungicide, Bavistin and Tilt on seed borne fungal flora in chilli

“…It is therefore, judicious to explore less expensive, less risky non chemical methods of pathogen control such as seed treatment. Now a day's research all over the world is much interested to control disease by alternate means such as use of bio-agents or plant extracts or elicitors (Monjil et al, 2014;Islam and Monjil, 2016a). Plant extracts increase seed germination and improves seedling vigour (Hasan et al, 2005).…”

Managing the Imminent Danger of Rice Blast (<i>Pyricularia oryzae</i> Cav.) and Sheath Blight (<i>Rhizoctonia solani</i> Kühn) Disease: A Critical Review Article

“…oryzae) by using both seed treatment and foliar sprays. Islam and Monjil [53] tested 6 plant extracts against sheath blight and found Biskatali (Polygonum hydropiper) at 1:10 ratio of application significantly reduced the sheath blight disease. Likewise, Yadav and Thrimurty [160] also reported the complete inhibition of mycelial growth of Sarocladium oryzae by leaf extracts of Mentha viridis (M. spicata).…”