Compatibility of insecticides with propiconazole against foliar aphid Rhopalosiphum maidis (Fitch) and yellow rust in wheat Jasrotia Poonam1,*, Katare Subhash2 1ICAR-Indian Institute of Wheat and Barley Research (IIWBR), Karnal, 132001 2Regional Research Station, ICAR-Central Potato Research Station (CPRI), Gwalior *Email: poonamjasrotia@gmail.com
Online published on 5 February, 2019. Abstract Occurrence of foliar aphid infestation and yellow rust infection is often simultaneous in wheat growing areas of North-Western Plains Zone (NWPZ). Farmers usually apply insecticides and fungicides separately for their management. Combined application of pesticides can be practiced saving cost, time and labour. Hence, a study was conducted during 2014–15 and 2015–16 to determine efficacy of two insecticides, imidacloprid @ 100 ml/ha and thiamethoxam @ 50 ml/ha, and one fungicide, propiconazole @ 500ml/ha alone as well as in combinations using two spray volumes of 250 and 500 l against foliar aphid and strip rust. The aphid population during 2014–15 after 15 days of spraying was observed to be the least (2.5 aphids/earhead) in sole application of imidacloprid @ 100 ml/ha, while during 2015–16, the least population (1.9 aphids/earhead) was in combination treatment of propiconazole with thiamethoxam @ 50 ml/ha in 250 l of water. The strip rust severity in combination treatments was 5–10% as compared to 40–60% in control plots. Coccinellid population in combination treatments ranged from 13.0–19.6/plot as compared to 39.6–42.3/plot in control plots. The studies indicated that mixing of broad spectrum fungicide, propiconazole did not influence the efficacy of two insecticides against foliar aphid. Top Keywords Wheat, foliar aphid, yellow rust, imidacloprid, thiamethoxam, propiconazole, compatibility, coccinellids, stripe rust. Top |