Biology and large scale demonstration for management of Orobancheaegyptiaca in mustard

摘要

Field experiments to study the efficacy of neem cake, soil drenching of metalaxyl, post-emergence application of glyphosate at very low concentrations alone and in combination with 1% solution of ammonium sulphate and 125% of recommended fertility, were conducted at village Ganghala (Bhiwani) during Rabi seasons of 2014-15 and village Bidhwan (Bhiwani) during 2015-16. Feasibility of adoption of results of studies conducted earlier on use of glyphosate 25 g/ha at 30 DAS and 50 g/ha at 55 DAS is beingdemonstrated by multi location field trials through farmers participatory approach in different parts of state during 2010-2016. Neem cake 400 kg/ha fb pendimethalin (PPI) at 0.75 kg/ha fb HW at 60 DAS did not prove effective in minimizing density of Orobanche. Post-emergence application of glyphosate at 25 and 50 g/ha at 25 and 55 DAS, respectively showed promising results with 75-95% control of this weed in experimental field and 76.5% on large scale demonstrations at farmers' fields. Biotype from Ganghala (Bhiwani) was found to be most robust biotype with 5840 seeds per capsule.