Bio-efficacy of Fenazaquin 20 SC against European Red Mite, Panonychus ulmi (Acari: Tetranychidae) on Apple in Kashmir, India

Abstract

Efficacy studies were conducted during June-July in 2017 and 2018 at two locations in district Baramulla of Jammu and Kashmir against the phytophagous mite Panonychus ulmi (Koch) in apple orchards. The test molecule Fenazaquin 20 SC at the dosages of 15, 20 and 25 ml along with standard check Hexythiazox 5.45 EC and Fenazaquin 10 SC at 40 ml per 100 litre of water were evaluated against Panonychus ulmi. After fifteen days of spray, maximum 90.45 and 87.99 per cent ERM mortality of was obtained from Fenazaquin 20 SC @ 25 ml in both the years at location Ferozpura, Rafiabad; whereas, at another location Chitkak (Handwara), Kupwara, highest ERM mortality of 84.95 and 90.18 per cent was recorded during both the respective years. The least mortality of natural enemies Coccinellids (pooled for two years) as 23.32 and 22.91 per cent was recorded with the test chemical Fenazaquin 20 SC @ 15 ml per litre of water; whereas, highest mortality of 32.09 and 30.46 was recorded with test molecule @ 25 ml. in Ferozpura, Rafiabad; and Chitkak (Handwara), Kupwara. Similarly, the least mortality of Amblyseius spp. as 34.50 and 33.38 per cent too was recorded with the Fenazaquin 20 SC @ 15 ml per litre of water. The highest yield of apples was recorded with application of Fenazaquin 20 EC @ 25ml in both the locations.