Biopesticide for Pest Control and Drought Stress in Potato Crop

Juan Manuel Covarrubias-Ramírez, Lourdes Díaz-Jiménez and Victor Manuel Parga-Torres

Journal of Agricultural Science, 2025, vol. 18, issue 1, 30

Abstract: The excessive use of synthetic insecticides and the environmental stress in the crops led us to determine pest control by a biopesticide that induces the concentration of nordiguaracetic acid (NDGA), kaempferol and quercetin as defence activators in the potato crop. A biopesticide was applied to four potato genotypes- Fiana, Silvestre, Norteña and 09-37, under rainfed conditions, the repellent biopesticide was applied to the 16 DAE and the biofungicide to the 27 DAE, the concentration of kaempferol, quercetin and NDGA before applying the biopesticides was made at 14 DAE and the second sample was 37 DAE after applying the doses of the product, it was analyzed by completely random design with 4 treatments and 4 repetitions. The repellency of the potato flea beetle (Epitrix cucumeris), the concentration of ingredients in leaves and the absorption of the biopesticide were determined. The repellency at 27 DAE was 93.5% and at 37 DAE was 97.5%, there was no presence of diseases, at 14 DEA, no incidence of the ingredients was found in the crop, at 37 DAE, the 09-35 genotype had the highest concentration of NDAG with 558.75 mg/kg with 54.09% absorption and kaempferol with 135.92 mg/kg with absorption of 98%, the Silvestre variety with 9404.3 mg/kg with absorption of 64.37%, for the rest of the genotypes are significantly higher. The effect on repellency could be because the insect was not adapted to these ingredients and the absence of diseases to the defence activators and their absorption in the plant, so the plants did not show drought stress.

Date: 2025
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