FOOD SCIENCE ›› 2013, Vol. 34 ›› Issue (11): 41-44.doi: 10.7506/spkx1002-6630-201311010

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Degradation Kinetics of 5 Pyrethroid Pesticide Residues in Pleurotus ostreatus and Growing Medium

FAN Zhong-chen,TANG Jun,CAO Hai-qun,WU Xiang-wei,HUA Ri-mao,TANG Feng,YUE Yong-de   

  1. 1. Key Laboratory of Agri-food Safety of Anhui Province, College of Plant Protection, Anhui Agricultural University, Hefei 230036, China;2. Key Laboratory of Agri-food Safety of Anhui Province, College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China;3. International Centre for Bamboo and Rattan, Beijing 100080, China
  • Received:2012-03-12 Revised:2013-03-15 Online:2013-06-15 Published:2013-06-03
  • Contact: Hai-Qun CAO E-mail:caohq@vip.163.com

Abstract:

The degradation kinetics of 5 pyrethroid pesticides in Pleurotus ostreatus and growing medium was studied by
using the validated analytical methods. The results indicated that the half-lives of five pyrethroids in Pleurotus ostreatus
and growing medium were 3.01-5.06 d and 25.48-54.59 d, respectively. Sterilization remarkably reduced pyrethroid
pesticide residues in the growing medium with degradation rate ranging from 18.80% to 61.16%. Pyrethroid pesticide
residues in the growing medium remained high after the mushroom was cultivated for 42, 62, 83 d and 103 d, which
were 1.29-7.40, 1.55-6.8, 0.32-1.78 mg/kg and 0.14-1.76 mg/kg, respectively. In contrast, no pyrethroid pesticide
residues were detected in Pleurotus ostreatus harvested at the same time points. Consequently, our findings suggest that
potential pyrethroid pesticide residues cannot be transferred to Pleurotus ostreatus fruitbodies, and thus have little impact
on the quality and safety of the edible fungus.

Key words: Pleurotus ostreatus, growing medium, pyrethroids, degradation kinetics, half-life

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