Bioefficacy of fenpyroximate 5EC against european red Mite, Panonychus Ulmi koch. infesting apple

Field trials were laid out to test the effectiveness of newer acaricide i.e. fenpyroximate (Pyromite) 5 EC against European red mite, Panonychus ulmi Koch, infesting apple in Harsil area of Uttarkashi district of Uttarakhand. The experiment was conducted on 12–15 years old apple trees cv. Golden delicious under randomized block design with three replications. Various dosage viz. 0.25, 0.5, 0.75, 1.0 and 2.0 ml/l of fenpyroximate were compared with conventional acaricides viz fenazaquin 10 EC (0.5 ml/l), sulfer (0.5 ml/l) and water spray against P. ulmi during 2010 and 2011. At highest dosage (2.0 ml/l), there was 83.88 and 85.67% reduction of mite population on first day after spray (DAS) which increased 97.33 and 98.33% on 10th DAS during 2010 and 2011, respectively. This was significantly superior with fenazaquin 10 EC (0.5 ml/l) and sulfer (0.5 ml/l) where 82.30 and 80.00; 82.30 and 78.60% reduction was recorded during two consecutive years, respectively. However, sulfur was found to be at par with fenazaquin. Significantly, highest yield (171.33 and 158.25 kg/tree) was recorded with highest dosage of fenpyroximate (2.0 ml/l) which was at par with lower dosage (1.0 ml/l) of fenpyroximate (170.25 and 155.25 kg/tree) (p 0.05 = 6.428 and 5.810) during two consecutive years. At 0.5 ml/l dosage, fenazaquin 10 EC (150.25 & 143.75 kg/tree) proved to be at par with fenpyroximate (155.75 & 148.25 kg/tree) (p 0.05= 6.4298 & 5.810).