Remediation Potential of Insecticide Residue in Shallot as Mitigation of Climate Change Impact

Climate change has triggered an explosion of pests and diseases in shallot plants. Farmers anticipate this condition by increasing the intensity and dose of pesticide use, which impacts the contamination of residues in soil, water, and shallot plants. This study aims to remediate soil, water, and shallot products using compost, biochar, activated charcoal from agricultural waste, indigenous bacteria, and post-harvest processing techniques of shallots. The research was conducted on a laboratory scale. Soil, water, and shallots from Brebes District were spiked with 0.5 ppm pesticides with active ingredients organophosphate (chlorpyrifos, diazinon, profenofos) and organochlorine (aldrin, dieldrin, DDT, endosulfan, lindane). The polluted soil is then added with 40 tons/ha of compost, 10 tons/ha of biochar, and 2 l/ha indigenous bacteria and irrigated like shallots for 60 days. Irrigation water is filtered using activated charcoal. The well water is boiled until boiling for 10 min. Shallots are sliced and then processed by steaming and frying. The results showed that remediation of soil, irrigation water, well water, and shallot products on pesticide contamination could be reduced by 73.07%, 76.40%, 100%, and 71.82–98.22% for organophosphates and 92.88%, 100.0%, 99.95%, and 99.40–100.0% for organochlorines, respectively. Remediation techniques through biochar-compost, water filters, and treatment processes can reduce the impact of pesticides on farmers and the environment of intensive shallot farming.