SCREENING OF BLACKGRAM & GREENGRAM GERMPLASM AND COMBINED EFFECT OF Baciillllus tthuriingiiensiis ((Berlliiner)) WITH SOME SECONDARY PLANT METABOLITES AGAINST Spodopttera lliittura ((Fabriiciius))
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Date
2022-08
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G. B. Pant University of Agriculture & Technology, Pantnagar-263145
Abstract
The present investigations were carried out to study the screening of blackgram
and greengram germplasm under field conditions at the Norman E. Borlaug Crop Research
Centre during the kharif season of 2021. Compatibility of B. thuringiensis with some
secondary plant metabolites and combined effect of B. thuringiensis with some secondary
plant metabolites against S. litura (Fab.) infesting blackgram and greengram were
conducted in PGR Lab, Department of Entomology, College of Agriculture, G. B. Pant
University of Agriculture and Technology, Pantnagar, Uttrakhand.
On the basis of data recorded among various entries DAFTRI 471 & JLPU 819-18
were found superior against whitefly and IPU 2-43, RVSTU 21-1& RUG 59 were found
tolerant against M. distalis & Jassids respectively, whereas PU 1706 found superior
against defoliators in blackgram.
In case of greengram MH 1468, MH 1857, PUSA M 21-71 were found superior
against jassid & thrips, whitefly, defoliators respectively.
Compatibility study of B. thuringiensis with different secondary plant metabolites
indicated that α- pinene, saponin, maleic acid and oxalic acid were found compatible with
B. thuringiensis at all the concentration, while quercetin was found incompatible.
Bio assay study was carried out to evaluate the combined effect of B. thuringiensis
with some secondary plant metabolites against 6 days old larvae of S. litura (Fab.). All the
combinations showed higher dose-mortality response than the sole treatment of B.
thuringiensis or the secondary plant metabolites. The combination of the secondary plant
metabolites with B. thuringiensis showed 1.06–1.30 fold increase in toxicity of secondary
plant metabolites over sole treatment.
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Theses of M.Sc.