Studies on variability in Fusarium oxysporum f. sp. lentis causing wilt of lentil and its management
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Date
2021-08-17
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ANDUAT,Kumarganj, Ayodhya
Abstract
The current study, title “Studies on Variability in F. oxysporum f. sp. lentis causing
wilt of lentil and its management”. Was carried out at the student Instructional Farm, in the
Department of Plant Pathology, A.N.D. Uni. of Agri. and Tech., Kumarganj, Ayodhya. Which
is situated in the Indo-Gangetic Plain Zone of Eastern Uttar Pradesh at latitude of 26.470 and
an altitude of 113 meters above sea level. Lentil (Lens culinaris Medik) is a major pulse crop
in Indian and and grown in Rabi season. Among the soil born diseases Fusarium wilt caused
by Fol is a major disease of lentil in all areas growing of the country while it grown after
paddy, for minimizing of integrated disease management along with use of chemicals and bioagents.
The characteristics symptoms of wilt was browning of xylem and phloem when split
open. Three hundred genotypes were screened against Fol following sick plot technique in 0-9
disease rating scale, where 50 genotypes were recorded resistance reaction under natural
condition while under artificial condition none was found immune or resistance against lentil
wilt. In this study five ditricts were surveyed, the disease varies 6.27 to 19.38 per cent where
minimum disease incidence was recorded in banda (6.27%) while maximum disease
incidence was recorded in banda (19.38%). The data on in vitro efficacy of test fungicides and
bio-agents were recorded after 7 days of inoculation. All the treatments reduced significantly
the mycelial growth of F. oxysporum f. sp lentis. Out of four fungicides and five bio-agents
viz., Tebuconazole (94.78%), Mancozeb (94.04%), Carbendazim (92.12%)., Copper
oxychloride (92.18%) and Bacillus sp. (90.70%), followed by P. fluorescence (88.66%), T.
viride (88.08%), T. harzianum (86.40%), T. virens (84.72%) were reduced significantly
mycelial growth of F. oxysporum f. sp lentis. The most effective fungicides and bio-agents
were further tested in vivo against wilt disease of lentil. In case field response the fungicide
and bio-agents, data were recorded at 30, 45 and 60 days after sowing. All treatments
significantly control the disease. The Tebuconazole @ 0.1% (83.69 %), @ 0.1% (83.81 %)
and @ 0.1% (76.87 %) control the disease at 30, 45 and 60 days respectively. while in case
of bio-agents Bacillus sp. @ 10g/kg seed maximum disease control (78.29%), 2019-20 but in
2020-21 maximum disease control (78.31%), was found most effective against fusarium wilt
of lentil.
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