Reference

Pesticide multiresidue analysis in Panax ginseng (C

All Rights Reserved. Pesticide multiresidue analysis in Panax ginseng (C. A. Meyer) by solid-phase extraction and gas chromatography with electron capture and nitrogen-phosphorus detection. Park, Young-Seok; Abd El-Aty, A. M.; Choi, Jeong-Heui; Cho, Soon-Kil; Shin, Dong-Hah; Shim, Jae-Han (Natural Products Chemistry Laboratory, Institute of Agricultural Science and Technology, Chonnam National University, Gwangju 500-757, S. Korea). Biomedical Chromatography, 21(1), 29-39 (English) 2007 John Wiley & Sons Ltd. CODEN: BICHE2. ISSN: 0269-3879. DOCUMENT TYPE: Journal CA Section: 64 (Pharmaceutical Analysis) Section cross-reference(s): 5 An anal. multi-residue method using gas chromatog. coupled with electron capture and a nitrogen-phosphorus detector was investigated for the simultaneous detn. of 18 commonly used insecticides and fungicides in Korean ginseng (Panax ginseng C. A. Meyer). Samples were previously extd. with an acetonitrile and cleaned up by solid-phase extn. (SPE).Several substances with their cas registry numbers 66332-96-5 and 95465-99-9 may be metioned in this study. The calibration curves were linear, with detn. coeffs. > 0.989. Recoveries at concns. between 0.01 and 14.9 ppm ranged from 72.3 to 117.2%, with precision, which was expressed as relative std. deviation (RSD), at values lower than 5%. The proposed method was applied to the detn. of pesticide levels from 12 ginseng samples, taken from 4 different agricultural areas of Jeonnam province, where several insecticides and fungicides were applied. Except in 1 sample, tolclofos-m was the only pesticide contained at a level lower than the max. residue limits (MRL) authorized by the Korea Food and Drug Administration (KFDA) in real ginseng samples grown for 4, 5 and 6 years. .

Imidacloprid can reduce the impact of the whitegrub Antitrogus parvulus on Australian sugarcane

Imidacloprid can reduce the impact of the whitegrub Antitrogus parvulus on Australian sugarcane. McGill, N. G.; Bade, G. S.; Vitelli, R. A.; Allsopp, P. G. (BSES Ltd., Bundaberg DC 4670, Australia). Crop Protection, 22(10), 1169-1176 (English) 2003 Elsevier Science B.V. CODEN: CRPTD6. ISSN: 0261-2194. DOCUMENT TYPE: Journal CA Section: 5 (Agrochemical Bioregulators) Management of Childers canegrubs, Antitrogus parvulus , is heavily dependant on organophosphate insecticides.Several substances with their cas registry numbers 95465-99-9 and 138261-41-3 may be metioned in this study. The potential of imidacloprid to control existing infestations of third-instar larvae in sugarcane was tested. Two SC and one WG formulation of imidacloprid (Confidor) were tested in 11 trials near Bundaberg or Childers in southern Queensland. These defined useful application rates for the formulations, compared the efficacy of formulations, tested surface and subsurface placement, tested different spacings of the coulters behind which the insecticide was applied, and compared the efficacy of early and late applications of the insecticide. Comparisons were made with cadusafos (Rugby 100 G). Kill of larvae was not as rapid or great as following treatment with cadusafos, but surviving larvae appeared not to be feeding as much. Both SC formulations at rates of at least 3.75 g active ingredient/100 m of row applied into the soil behind coulters placed either side of the stool gave similar gains in cane yield to applications of cadusafos. The WG formulation showed some responses, but was not tested extensively. Application to the soil surface was not as effective as injection into the soil behind coulters. Efficacy seemed to be largely unaffected by the spacing between the coulters. Early applications appear to be more effective than later applications, and lead to larger yield responses. Imidacloprid provides a way of treating infested ratoon crops, does not degrade in high-pH soils, and can be used in rotation with the organophosphate-based cadusafos and chlorpyrifos (suSCon Blue) to minimize the development of insecticide resistance. .