Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2019, Vol. 35 ›› Issue (21): 159-164.doi: 10.11924/j.issn.1000-6850.casb18020073

Special Issue: 小麦

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Pyraclostrobin: Control Efficacy Against Fusarium Head Blight and Its Residue in Wheat Grain

  

  • Received:2018-02-23 Revised:2018-04-19 Accepted:2018-05-15 Online:2019-08-13 Published:2019-08-13

Abstract: In order to clarify the feasibility and safety of using pyraclostrobin against Fusarium head blight, the indoor toxicity test, field control efficacy test and residual detection were carried. The results showed that: except for the toxicity of pyraclostrobin against mycelial growth were lower than carbendazim in Shandong province, pyraclostrobin against conidial germination in Shandong and Anhui province and against mycelial growth in Anhui province were all higher than carbendazim. The control efficacy of pyraclostrobin aganist Fusarium head blight was above 78.33% both in Shandong and Anhui province, and the control efficacy of pyraclostrobin was higher than carbendazim in Anhui province. The yield of wheat treated with pyraclostrobin at 150 g a.i..hm-2 and 225 g a.i..hm-2 were all above 0.69 kg.m-2 and were higher than carbendazim. The pyraclostrobin residue quantity in harvested wheat grain was 0.0310~0.0647 mg.kg-1, less than 0.2 mg.kg-1 formulated by the Codex Alimentarius Commission. The half-life of pyraclostrobin in wheat plants was shorter than 11.3 days in Shandong and Anhui province, and the half-life in soil was shorter than 9.9 d, which was easy to degrade. So pyraclostrobin can be used to effectively control fusarium head blight, meanwhile be safe for the human body.