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Dissipation and Persistence of Propaquizafop in Soil, Plant and Rhizomes in Turmeric and its Effect on Soil Properties


Affiliations
1 AICRP on Weed Control, ANGRAU, Rajendranagar, Hyderabad-30, India
2 Department of Agronomy, College of Agriculture, Rajendranagar, Hyderabad, India
 

Propaquizafop is a new graminicide herbicide recommended for control of grassy weeds in all dryland and ID crops. A field experiment was conducted during Kharif 2012 at the College Farm, ANGRAU, Hyderabad, on a Alfisol, to study the dissipation and persistence of varying doses of propaquizafop (25, 50, 62.5, 100 and 125g a.i/ha) in soil and turmeric. The influence of the herbicide on soil physical, physico-chemical and fertility properties was also assessed. Residues of the propaquizafop in soil and soybean were estimated on GC-ECD. Recovery of the herbicide in soil was 91.8-92.6%. In the rhizome and plant, the recovery was 88.6-92.1% and 93.6-93.8%, respectively. Limit of quantification was 0.01 mg/kg. No significant changes in physical (texture, bulk density, particle density, pore space, maximum water holding capacity), physico-chemical (pH, EC, CEC, organic carbon) and available nutrient status of the soil (available N, P2O5 and K2O) were noticed in any of the applied doses of the herbicide. Application of propaquizafop @62.5 g/ha resulted in highest bio-efficiency. Propaquizafop dissipation in soil followed a first-order decay process. Half-life of the herbicide in soil increased with increasing dose. At sub-optimal doses, 50.0 g/ha, residues of propaquizafop persisted in the soil upto 15 DAA, (days after application) with a half life (DT50) of 15.12 days. At the recommended dose (62.5 g/ha) half-life of propaquizafop was 17.67 days and residues reached below detectable limit (BDL) beyond 30 DAA. At doses above recommended level (100.0 and 125 g/ha), herbicide residues in the soil persisted for a longer period (45 and 60 DAA respectively) with DT50 of 21.29 and 29.36 DAA, respectively. No detectable residues of propaquizafop were detected in the turmeric rhizomes or plant at the time of harvest.

Keywords

Propaquizafop, Turmeric, Herbicide Persistence, Half-Life, Soil Properties.
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  • APPMA 2013. Andhra Pradesh Pesticide Manufacturer’s Association Herbicide consumption Data.

  • Bernard, A. Keen and Henry Razkowski 1921. The relation between the clay content and certain physical properties of a soil. Journal of Agricultural Sciences, 11: 441-449.

  • EFSA 2008. European Food Safety Authority Scientific Report. Conclusion on the peer review of quizalofop-P, 205: 1-216.

  • EFSA 2012. Reasoned opinion on the modification of the existing MRLs for quizalofop-P in oilseed rape, sunflower, cotton and soybean. EFSA Journal, 10(12): 01-28

  • Hee, K.K., Bong, K.Y., Injin, P. and Yong, T.S. 1996. Fate of herbicide quizalofop in soil. Koren Journal of Environmental Agriculture, 15(4): 488-493.

  • Jackson, M.L. 1973. Soil Chemical Analysis. Prenctice Hall of India Pvt. Ltd., New Delhi.

  • Jiye, Hu., Deng, Z., Chang, L., Zhixin, Z. 2010. Simultaneous analysis of herbicide metribuzin and quizalofop-p-ethyl residues in potato and soil by GC-ECD. Chromatographia, 72: 701-706.

  • Olsen, S.R., Cole, C.V., Watanabe, F.S. and Dean, L.A. 1954. Estimation of available phosphorus in soils by extraction with sodium bicarbonate. Circular of US Dept. of Agriculture, 939.

  • Piper, C.S. 1966. Soil and Plant Analysis. International Science Publishers, New York, 47-49.

  • Richards, L.A. 1954. Diagnosis and improvement of saline and alkali soils. Agricultural Hand Book No. 60. United States Department of Agriculture (USDA), Washington.

  • Roberts, T.R. 1996. Assessing the fate of agrochemicals. Journal of Environmental Science and Health, 31(3): 325-335.

  • Sarkar, S. and Majumdar, B. 2013. Herbicidal effect on weed growth, crop yield and soil microbes in olitorius jute (Corchorus olitorius L.). Journal of Tropical Agriculture, 51(1-2): 23-29.

  • Subbiah, B.V. and Asija, G.L. 1956. A rapid procedure for determination of available nitrogen in rice soils. Current Science, 31: 196.

  • Walkley, A.J. and Black, I.S. 1934. Estimation of organic carbon by chromic acid titration method. Soil Science, 37: 29-38.


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  • Dissipation and Persistence of Propaquizafop in Soil, Plant and Rhizomes in Turmeric and its Effect on Soil Properties

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Authors

T. Ramprakash
AICRP on Weed Control, ANGRAU, Rajendranagar, Hyderabad-30, India
M. Madhavi
Department of Agronomy, College of Agriculture, Rajendranagar, Hyderabad, India
M. Yakadri
AICRP on Weed Control, ANGRAU, Rajendranagar, Hyderabad-30, India

Abstract


Propaquizafop is a new graminicide herbicide recommended for control of grassy weeds in all dryland and ID crops. A field experiment was conducted during Kharif 2012 at the College Farm, ANGRAU, Hyderabad, on a Alfisol, to study the dissipation and persistence of varying doses of propaquizafop (25, 50, 62.5, 100 and 125g a.i/ha) in soil and turmeric. The influence of the herbicide on soil physical, physico-chemical and fertility properties was also assessed. Residues of the propaquizafop in soil and soybean were estimated on GC-ECD. Recovery of the herbicide in soil was 91.8-92.6%. In the rhizome and plant, the recovery was 88.6-92.1% and 93.6-93.8%, respectively. Limit of quantification was 0.01 mg/kg. No significant changes in physical (texture, bulk density, particle density, pore space, maximum water holding capacity), physico-chemical (pH, EC, CEC, organic carbon) and available nutrient status of the soil (available N, P2O5 and K2O) were noticed in any of the applied doses of the herbicide. Application of propaquizafop @62.5 g/ha resulted in highest bio-efficiency. Propaquizafop dissipation in soil followed a first-order decay process. Half-life of the herbicide in soil increased with increasing dose. At sub-optimal doses, 50.0 g/ha, residues of propaquizafop persisted in the soil upto 15 DAA, (days after application) with a half life (DT50) of 15.12 days. At the recommended dose (62.5 g/ha) half-life of propaquizafop was 17.67 days and residues reached below detectable limit (BDL) beyond 30 DAA. At doses above recommended level (100.0 and 125 g/ha), herbicide residues in the soil persisted for a longer period (45 and 60 DAA respectively) with DT50 of 21.29 and 29.36 DAA, respectively. No detectable residues of propaquizafop were detected in the turmeric rhizomes or plant at the time of harvest.

Keywords


Propaquizafop, Turmeric, Herbicide Persistence, Half-Life, Soil Properties.

References