Herbicidal Effect of Imazethapyr and Its Ready-mix With Imazemox on Performance of Green Gram (Vigna Radiata L.) and Associated Weeds

Abstract

A field experiment was conducted during Kharif season of 20 I 5 at Crop Research Centre Chirauri, Sardar Vallabhbhai Patel lJnivcrsity of Agriculture and Technology, Meerut (lJ.P.) The experimental soil was low in organic carbon, nitrogen and • • • medium in available P and K. The experiment was conducted in RBD with three replications comprising fifteen weed management practices viz. Jmazethapyr (cg, 70 g ha-1 as pre plant incorporation, Imazethapyr @ 80 g ha·1 as pre plant incorporation, Imazcthapyr @ 70 g ha·' as pre etnergence, lmazethapyr @80 g ha-1 as pre emergence, Imazethapyr ® 70 g ha-1 at 3-4 I leaf Stage, Imazethapyr ® 80 g ha·' at 3-4 leaf Stage, Jmazethapyr +imazcmox (RM)@ 70 g ha-1 as pre emergence, Imazethapyr +imazemox (f{M) ® 80 g ha-1 as pre emergence, Imazethapyr +iJnazetnox (RM) @ 70 g ha·' at 3-4 leaf Stage, Imazcthapyr +imaze1nox (RM) (qJ 80 g ha-' at 3-4 leaf Stage, Pendimethalin (i9 I 000 g ha·' as pre emergence, Jmazcthapyr + PendiJnethalin (RM)@ 1000 g ha·' as pre emergence, Hand weeding at 20&40 I) AS, Weed free and Weedy check . 1 he result indicate that che1nical method of weed control significantly reduced the weed population and dry weight effectively over weedy check. 1 he tallest plants, higher number of branches planf1, dry matter accu1nulation, weed control efficiency, nutrient uptake and grain yield ( 1020 kg ha-1 ) was recorded with the POE application of imazethapyr + i1nazcmox@ 80 g ha·' followed by POE application of imazethapyr + imazemox@ 70 g ha·' (928 kg ha-l), which established its superiority over rest of the herbicides. Sin1iJarly, POE application of irnazethapyr + iJnazeJnox @ 80 and 70 g ha-1 resulted into higher gross return net return and B: C ratio. l''he total nitrogen, phosphorus and potassiun1 uptake by green gran1 crop were recorded higher under POE application of irnazcthapyr + itnaz~rnox @ 80 g ha'" ', respectively.