Document Type : Original Article
Author
Plant Protection Research Institute, ARC
Abstract
Maize belongs to the most important crop in Egypt. All parts of the crop can be used for food and non-food products. Maize is largely used as livestock feed and as a raw material for industrial products. The maize is infested with weeds. The chloroacetamide herbicide acetochlor is used for pre-emergence control of annual grasses and broadleaf weeds in maize. The experiment was carried out at the private farm Abukabier districts, Sharkia Governorate, Egypt, during April 2020 summer season. The soil samples were taken from the soil, thenceforth transferred to the laboratory experiments, at plant protection research station, Qaha, Qaliobia Governorate, to extraction and clean-up procedures. The residues were determined using HPLC. The purpose of this work wastomonitor acetochlor herbicide residues in soil under maize at Sharkia Governorate, Egypt. The results showed residues of acetochlor in the soil after 24 hrs of spray, 5,10,15,20,25 and 30 days, respectively. The data illustrated that acetochlor residues recorded 0.12 ppm after 24 hrs such amount decreased gradually by time, recorded 0.1, 0.04, 0.03, 0.02, 0.01 and 0.005 after 5, 10, 15, 20, 25 and 30 days, respectively. Dissipation percentages of acetochlor were recorded at 16.66 % after 5 days. while after 10,15,20, 25 and 30 days recorded 66.7 % ,75.00 %, 83.3 %, 91.7 and 95.8 dissipation % , respectively. the highest dissipation percentages were noticed in the 20th 25th and 30th days from the spray. Also, the results showed that the slope of acetochlor was 0.04, the rate of degradation was 0.09 and the half-life of acetochlor was recorded 7.7 days after spray.
Keywords
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