Use of bentonite and humic acid as modifying agents in alginate-based controlled-release formulations of imidacloprid
Use of bentonite and humic acid as modifying agents in alginate-based controlled-release formulations of imidacloprid
- Pesticide Science, 55(5), p.546-552, 1999 .
In order to prepare a formulation to be used for controlled release, imidacloprid was incorporated into alginate granules by using calcium chloride as gellant. The formulation prepared (alginate-imidacloprid-water)was modified by the addition of different sorbents. The effects on release rate of the addition of natural bentonite desiccated at 105 °C, untreated, acid-treated with sulfuric acid solutions over a concentration range between 0.5 mol dm-3 and 2.5 mol dm-3, and a commercial humic acid, were studied by immersion of the granules in water under static conditions. The time taken for 50
IMIDACLOPRID
CONTROLLED RELEASE
BENTONITE
HUMIC ACID
SORPTION-DESORPTION
In order to prepare a formulation to be used for controlled release, imidacloprid was incorporated into alginate granules by using calcium chloride as gellant. The formulation prepared (alginate-imidacloprid-water)was modified by the addition of different sorbents. The effects on release rate of the addition of natural bentonite desiccated at 105 °C, untreated, acid-treated with sulfuric acid solutions over a concentration range between 0.5 mol dm-3 and 2.5 mol dm-3, and a commercial humic acid, were studied by immersion of the granules in water under static conditions. The time taken for 50
IMIDACLOPRID
CONTROLLED RELEASE
BENTONITE
HUMIC ACID
SORPTION-DESORPTION