Proceedings of the Asia regional workshop on the

Pesticide quality analysis
To revise <strong>the</strong> Korean pesticide test guidelines internationally harmonized, many guidelines
were collected and reviewed from o<strong>the</strong>r countries including US/EPA, EU, OECD and Japan. The
result <strong>of</strong> reviewing collections found that <strong>the</strong>re were many guidelines to be amended, which are
stability test and degradation test <strong>of</strong> active substance, storage stability test and so on. Draft test
guideline for physico-chemical properties <strong>of</strong> pesticide active ingredients was made.
To evaluate pesticide product qualities, 100 pesticide technical grade, 923 products in
circulation, 131 products for registration trials, 117 products for registration and 28 products on civil
petition were analyzed. 14 products <strong>of</strong> those were declared inadequate, new <strong>of</strong>ficial analytical
methods <strong>of</strong> newly-registration <strong>of</strong> 11 items (Simeconazole etc.) were fixed and <strong>the</strong> provisional
KOPAC methods <strong>of</strong> Et<strong>of</strong>enprox etc. were modified. This laboratory has participated in <strong>the</strong> CIPAC
collaborative study on Prallethrin analysis and IAEA Coordinated Research Project on elaboration <strong>of</strong>
multi-analytical method for quality control <strong>of</strong> Isoprothiolane and IBP.
Impurities in TGAIs
TGAIs being used for pesticide formulations contain known or unknown toxicants due to <strong>the</strong>
purity, PMA announced <strong>the</strong> recognized toxic impurities which might contaminate in <strong>the</strong> final
pesticide products. All <strong>the</strong> formulators have to inform RDA <strong>of</strong> <strong>the</strong> qualitative data on <strong>the</strong> impurity in
case <strong>the</strong>y manufacture <strong>the</strong> pesticide products. All <strong>the</strong> formulators have to inform RDA <strong>of</strong> <strong>the</strong>
qualitative data on <strong>the</strong> impurity in case <strong>the</strong>y manufacture <strong>the</strong> pesticides using relevant TGAIs. The
announced impurities are as below.
TGAI Announced impurity Violation content
Chlorthalonil Hexachlprbenzene (HCB) 0.05%
Dic<strong>of</strong>ol Compounds related with DDT 0.1%
EDBC (Mancozeb) Ethylene thiourea 0.5%
Maleic hydrazine Hydrazine 1 ppm
Oxyfluorfen Perchlorinate ethylene 200 ppm
Trifluralin Nitrosoamine 0.5 ppm
Re-formulating pesticide products with expired shelf-life on <strong>the</strong> market
Pesticide products on <strong>the</strong> market with expired shelf-life are being collected by formulators
voluntarily, transported to <strong>the</strong>ir factory, and re-formulated in accordance with <strong>the</strong> physicochemical
parameters <strong>of</strong> <strong>the</strong>ir registration pr<strong>of</strong>iles. A remarkable reduction <strong>of</strong> obsolete pesticides on <strong>the</strong> market
was achievable by adopting this system.
Pesticide use survey
Pesticide usage survey was made on leaf vegetables growers and pesticide sellers. Input
amounts per unit on leaf vegetables was surveyed as 3.91 kg/ha on cabbage <strong>of</strong> field cultivation,
2.93 on cabbage <strong>of</strong> greenhouse, 0.76 on lettuce, 0.55 on spinach, 1.34 on perilla leaf, 4.89 on leek
and 0.42 kg/ha (with active ingredient) on young radish, respectively.
Survey on pesticide use pattern is being performed in a four year cycle; rice, orchard fruits,
leafy vegetables and fruit vegetables. Annual input <strong>of</strong> pesticide in arable paddy rice was surveyed in
1999 and 2003. Korea Crop Protection Association (KCPA) publishes pesticide year book which
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