Assessment of Cyanobacteria as Biocontrol Agents against the Fall Armyworm, (Spodoptera frugiperda) | ||||
| Egyptian Academic Journal of Biological Sciences, F. Toxicology & Pest Control | ||||
| Volume 17, Issue 2, December 2025, Page 11-19 PDF (624.79 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/eajbsf.2025.442848 | ||||
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| Authors | ||||
| hmed M. Shaker1; Rasha A.A. Sleem2; Abeer M. Mohammad3 | ||||
| 1Sids Agric. Res. Station, Beni Suef, Plant Protection Research Institute, ARC, Giza, Egypt. | ||||
| 2Bioassay Dept., Central Agric., Pesticides Lab. ARC, Dokki, Egypt. | ||||
| 3Plant Protection Research Institute , Agricultural Research Center , Dokki , Giza , Egypt. | ||||
| Abstract | ||||
| The pests' growing resistance to chemical pesticides necessitates the search for alternative pest management strategies. The toxicity of cyanobacterial microalgal strains Nostoc muscorum, Arthrospira, Anabanea fertilissima and Anabanea laxa were examined in in vitro assay as a bio pesticide against 4th instars of fall armyworm (Spodoptera frugiperda) Larvae fed on leaf discs of castor leaf oil painted with several concentrations of algal solution. The mortality percentage of treated 4th instar larvae fed on the 4 algal treatments shows that Arthrospira was the most potent, exhibiting the highest toxicity against the 4th larval instars. Where, its LC50 value was 83.5 ppm while, Anabanea laxa was the least one, its LC50 value was 380.2ppm, the moderate effect 177.8ppm and 243.4ppm for Arthrospira and Anabanea fertilissima respectively all algal treatments show observed effect on carbohydrates hydrolyzing enzymes and biochemical aspects of the pest it was noticed that noticeable decrease in enzymatic activity of invertase, amylase, and trehalase also there was a great disturbance in total carbohydrate, total protein, and total lipid content of larvae which indicate the efficacy of microalgal strains of cyanobacteria as bio pesticide for control fall armyworm. | ||||
| Keywords | ||||
| Fall armyworm; green algae; cyanobacteria; carbohydrate-hydrolyzing enzymes | ||||
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