Assessment of the Larvicidal Potency of Bacillus thuringiensis Against the Moth of Spoladea recurvalis on Amaranths Plant

  • * Muhammed, R., Yahaya, O and Machido, D. A.

  • UJMR 2022, 7(1), Pp 114 - 119, DOI:  10.47430/ujmr.2271.017


The control of Spoladeare curvalis, a major pest of amaranth plant, has been through the use of synthetic pesticides which have been reported to have detrimental effects. This study was aimed at assessing the larvicidal potency of B. thuringiensis against the larvae of Spoladea recurvalis on amaranth plant. The assessment of the larvicidal potency of B. thuringiensis isolates from cow range land and refuse dump sites in Zaria metropolis habouringCry1 gene (CR2, CR4, RD1) was carried out by spraying spore crystal mixture of B. thuringiensis isolates on amaranth plants infested with Spoladea recurvalis larvae. The mortality of S. recurvalis larvae, under a screen house were assessed after 24, 48 and 72hours of exposure to the spore crystal mixture of B. thuringiensis isolates. Spore crystal mixtures of B. thuringiensis isolates were effective in causing larvae mortality with more than 60% mean mortality rate of S. recurvalis larvae after 72hours of exposure. The mortality rate of Spoladea rescurvalis increased with increase in exposure period. Spore crystal mixture of Bacillus thuringiensis isolates should be considered as an alternative to synthetic pesticides for the control of Spoladea recurvalis larvae on amaranth plant.

Keywords: Bacillus thuringiensis; spore; larvae; amaranth; larvicidal.

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The Editorial Board of UJMR is glad to have published the Twelfth edition (Volume 7 Number 1, June, 2022). The Journal covers general and Applied Microbiology, Biotechnology, Biological Sciences, Biochemistry, Bioinformatics, Medical, Public Health and Environmental sciences.

This year, UMYU Journal of Microbiology Research (UJMR) has reached its 5th year of publication which started in 2016. Over these years, many changes have been made to the typeface and general formats of the manuscripts, both the print version and online copies, to make the Journal meet the international standard and more visually appealing. From volume 3 (2) onward, all the online copies of UJMR papers on our website have been uploaded with their full colours. In addition, both authors and co-author are issued with e-certificates of publication for their respective published manuscripts.

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