Effects of biochar amendment on sorption, dissipation, and uptake of fenamiphos and cadusafos nematicides in sandy soil

Luigi Lucini, Sherif B Abdel Ghani, Suloiman Al-Rehiayani, Moustafa El Agamy

Risultato della ricerca: Contributo in rivistaArticolo in rivista

3 Citazioni (Scopus)

Abstract

BACKGROUND: The application of biochar to soil is supposed to alter its adsorption/desorption potential toward pesticides, thereby affecting their bioavailability and efficacy. This is particularly relevant in the case of nematicides because these pesticides are directly applied to soil. RESULTS: Biochar was produced from date palm (PB) and eucalyptus (EB) waste at 450 °C and added at a rate of 1% to a sandy soil. The half-life (t½) of fenamiphos was increased from 2.7 to 18.3 and 18.6 days in PB- and EB-amended soils, respectively. By contrast, the half-life of cadusafos was unaffected. Freundlich Kf values increased from 1.22 and 0.39 (μg1–Nf g−1 mLNf) to 4.49 and 6.84 in 1% PB-amended soil, and to 3.49 and 4.62 in 1% EB-amended soil for cadusafos and fenamiphos, respectively. Plant uptake of both nematicides in tomato seedlings was reduced by approximately 97% (cadusafos) and 85% (fenamiphos). Although nematicide efficacy against Meloidogyne incognita was not altered at the recommended dosage, it was negatively affected at a half-dose rate. Under these conditions, it decreased from 43.1% in unamended sandy soil to only 18.3% in 1% PB-amended soil. CONCLUSIONS: Biochar addition increased the sorption capacity of soil. This resulted in a decrease of nematicide bioavailability, together with a reduction of both the dissipation rate and uptake by tomato plants. © 2018 Society of Chemical Industry.
Lingua originaleEnglish
pagine (da-a)2652-2659
Numero di pagine8
RivistaPest Management Science
Volume74
DOI
Stato di pubblicazionePubblicato - 2018

Keywords

  • Adsorption
  • Agronomy and Crop Science
  • Antinematodal Agents
  • Charcoal
  • Environmental Monitoring
  • Eucalyptus
  • Insect Science
  • Lycopersicon esculentum
  • Organophosphorus Compounds
  • Organothiophosphorus Compounds
  • Phoeniceae
  • Soil
  • Soil Pollutants
  • adsorption/desorption
  • biochar
  • bioefficiency
  • dissipation
  • nematicide
  • uptake

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