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Influence of Soil Characteristics and Formulation on Alachlor Dissipation in Soil

Institute of Natural Resources and Agrobiology (CSIC), Reina Mercedes, 10, Apdo. 1052, 41080-Seville, Spain

View larger version (19K): [in this window] [in a new window]   Fig. 1. Influence of ethylcellulose (EC)/herbicide ratio on the percentage of alachlor released into water after 100 h and remaining in loamy sand soil after 14 d from ethylcellulose microencapsulated (A4, A14, A15, and A22) and commercial (CF) formulations (AT, alachlor technical grade).

View larger version (18K): [in this window] [in a new window]   Fig. 2. Influence of shaking speed and type of ethylcellulose on the percentage of alachlor released into water after 100 h and remained in loamy sand soil after 14 d from ethylcellulose microencapsulated (A14, A17, A18, A22) and commercial (CF) formulations (AT, alachlor technical grade).

View larger version (20K): [in this window] [in a new window]   Fig. 3. Influence of polyethylene glycol (0 or 40%) on the percentage of alachlor released into water after 100 h and remaining in loamy sand soil after 14 d from ethylcellulose microencapsulated (A4, A8, A15, A17) and commercial (CF) formulations (AT, alachlor technical grade).

View larger version (23K): [in this window] [in a new window]   Fig. 4. Alachlor dissipation from ethylcellulose microencapsulated (A14, A18, A22) and commercial (CF) formulations in different soils.