Persistence of Fenazaquin in Apple Fruits and Soil

Persistence of fenazaquin (@100 and 200 g ai ha⁻¹) in apple fruits and ttee basin soil was sonducted at two locations, Mashobra and Nauni for three consecutive years (1999–2001). The persistence of fenazaquin was comparatively higher at Solan than Mashobra during 2000 and 2001. The initial deposits of fenazaquin on apple fruits ranged ffom 0.46–0.65 and 0.78–1.05 mg kg⁻¹ following application @ 100 and 200 g ai ha⁻¹. The residues dissipated with half-life of 1.9–5.3 days at lower dose and 3.6–5.2 days at higher dose. A safe waiting period of 20 days has been suggested. The residues in soil on 0 day ranged from 0.13–0.20 and 0.32–1.0 mg kg⁻¹ at 100 and 200 g ha⁻¹ which dissipated to non-detectable level on 30^th day.