AbstractResidues of tri‐allate in triticale (XTriticosecaleWittmack) were determined, after both preplant and pre‐emergence soil‐incorporated applications of tri‐allate at 1.4 kg ha−1, at the following crop stages: 2–3‐leaf, 5–6‐leaf, fully headed and mature (straw and grain). Tri‐allate residues were detected only in green tissue samples from the 2–3‐leaf stage of the crop. Recoveries of tri‐allate were in the order of 90 and 85%from the green tissue and grain at the 100 and 50 μg kg−1fortif