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Effects of Granule Size Ranges on Dazomet Degradation and Its Persistence with Different Environmental Factors

Author

Listed:
  • Lirui Ren

    (Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China)

  • Wenjing Li

    (Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China)

  • Qingjie Li

    (Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China)

  • Daqi Zhang

    (Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China)

  • Wensheng Fang

    (Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China)

  • Yuan Li

    (Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China)

  • Qiuxia Wang

    (Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China)

  • Xi Jin

    (Hebei Technology Innovation Center for Soil-borne Diseases Green Management, Baoding 071000, China)

  • Dongdong Yan

    (Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China)

  • Aocheng Cao

    (Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
    Hebei Technology Innovation Center for Soil-borne Diseases Green Management, Baoding 071000, China
    Beijing Innovation Consortium of Agriculture Research System, Beijing 100193, China)

Abstract

Pesticides are considered the most effective way to protect crops. However, irrational use has caused resources waste and environmental pollution. Dazomet (DZ) is a soil fumigant that has been used in many countries for decades, although it has caused occasional crop damage or insufficient control efficacy in some circumstances. In this study, the effects of DZ’s granule size and exposure to various environmental conditions on DZ degradation when used as a fumigant were demonstrated. The degradation rate of DZ was closely related to granule size. The half-life of larger DZ granules was longer than smaller granules with all studied environmental factors. The degradation rate decreased as the DZ usage (90–360 mg/kg) increased and different granule sizes showed the same variation trend. The half-life in each of the five granule size ranges tested decreased significantly as the temperature increased. DZ half-life decreased by 4.67–6.59 times as the temperature increased from 4 to 35 °C. Moreover, DZ usage and temperature affected the half-life of granules >400 and 300–400 μm in diameter significantly more than <100 μm granules. The half-life of all DZ granule sizes was reduced by 13.9–47.4% in alkaline compared to acidic conditions (pH from 9 to 5). Moreover, elevated temperatures could not only promote the production of methyl isothiocyanate (MITC) but accelerate its dissipation. The interactions between DZ granule size, dosage, temperature, and pH provide practical guidance on methods to improve DZ’s efficacy against pests and reduce the risk of phytotoxicity.

Suggested Citation

  • Lirui Ren & Wenjing Li & Qingjie Li & Daqi Zhang & Wensheng Fang & Yuan Li & Qiuxia Wang & Xi Jin & Dongdong Yan & Aocheng Cao, 2022. "Effects of Granule Size Ranges on Dazomet Degradation and Its Persistence with Different Environmental Factors," Agriculture, MDPI, vol. 12(5), pages 1-11, May.
  • Handle: RePEc:gam:jagris:v:12:y:2022:i:5:p:674-:d:811698
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    Cited by:

    1. Daqi Zhang & Lirui Ren & Wenjing Li & Qing Wang & Shenyan Liu & Xi Jin & Wensheng Fang & Dongdong Yan & Yuan Li & Qiuxia Wang & Qingli Han & Lin He & Aocheng Cao, 2022. "The Appropriate Particle Size of Dazomet Can Ensure the Soil Fumigation Effect from the Source," Agriculture, MDPI, vol. 12(11), pages 1-15, November.

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