Residues of β-Cyfluthrin in Cotton Seed and Cotton Lint

Six applications of β-cyfluthrin (Bulldock 025EC) at 7–10 d interval were made on cotton @ 12.50 and 18.75 ga.i. ha⁻¹ and the residues were estimated in cotton seed and lint using GLC equipped with ⁶³Ni ECD. The interval between last spray and harvest was 10 days. The residues of β-cyfluthrin were detected only in cotton lint samples with average values of 0.30 and 0.40 mg kg⁻¹ following its application at the above two dosages, respectively. Cotton seed samples did not reveal the presence of residues of p-cyfluthrin at the minimum detectability limit of 0.01 mgkg⁻¹.