Management residues of chlorpyrifos insecticides on shallot cropping through remediations technology

Abstract

Chlorpyrifos is a broad-spectrum insecticide and is widely used to Organism Pests Management (OPM). The remediation technology for polluted land is needed to reduce the risk of continuous impacts. The research aimed to reduce chlorpyrifos insecticide residues in shallot agriculture through remediation technology. The research was carried out in Naru Village, Sape Sub-District, Bima Regency (NTB) in June-August 2018. The experiment was designed in a randomized block design (RBD), three replications, and six treatments: (T1) farmers method, (T2) urea fertilizer-coated biochar, (T3) urea fertilizer-coated biochar enriched with consortia microbes, (T4) consortium microbes 2 L ha-1, (T5) urea fertilizer-coated nano biochar, and (T6) urea fertilizer-coated nano biochar enriched with consortia microbes. Remediation agents containing carbon, such as biochar and manure and some microbes can help accelerate the degradation of insecticides in the environment. Decreased chlorpyrifos residue from highest to low, respectively: urea fertilizer coated nano biochar>urea fertilizer coated nano biochar with enriched consortium microbes>urea fertilizer coated biochar>urea fertilizer coated biochar with enriched consortium microbes>consortium microbes 2 L ha-1. Treatment of urea fertilizer coated nano biochar and urea fertilizer coated nano biochar with enriched consortium microbes can be applied as a chlorpyrifos remediation technology in the shallot agriculture in silt texture soils.