2024, Vol. 5, Issue 2, Part D
Effect of biochar on nematode populations and pest dynamics in paddy fields
Author(s): Samuel Markovic
Abstract: The application of biochar, a carbon-rich byproduct derived from pyrolysis of organic biomass, has emerged as a promising soil amendment with multiple ecological benefits. In paddy fields, where soil fertility and pest management are critical for sustaining rice productivity, biochar provides a unique opportunity to simultaneously enhance soil properties and regulate pest populations, particularly plant-parasitic nematodes. This study evaluates the effect of biochar application on nematode communities and pest dynamics in rice agroecosystems. Field trials were conducted across two consecutive growing seasons in a subtropical paddy ecosystem to assess nematode abundance, diversity, and pest incidence under varying biochar application rates (0, 5, 10, and 15 t/ha). Statistical analyses revealed that biochar significantly reduced populations of root-knot nematodes (Meloidogyne spp.) and reniform nematodes (Rotylenchulus spp.), while enhancing populations of free-living nematodes, such as bacterivores and fungivores, that contribute positively to soil food webs. Pest incidence of rice stem borers (Scirpophaga incertulas) and brown planthopper (Nilaparvata lugens) declined in biochar-treated plots, likely due to improved soil health and induced systemic resistance in plants. Results demonstrated a dose-dependent effect, with 10 t/ha emerging as the optimal application rate for balancing nematode suppression, pest reduction, and yield improvement. Biochar addition also improved soil organic carbon, cation exchange capacity, and microbial activity, which correlated with enhanced resilience against biotic stress. These findings underscore the potential of biochar as a sustainable agroecological tool for integrated pest and nematode management in rice systems.
DOI: 10.33545/27080013.2024.v5.i2d.250
Pages: 292-295 | Views: 641 | Downloads: 217
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How to cite this article:
Samuel Markovic. Effect of biochar on nematode populations and pest dynamics in paddy fields. Acta Entomol Zool 2024;5(2):292-295. DOI: 10.33545/27080013.2024.v5.i2d.250
