The present investigation was conducted to evaluate the efficacy of herbicides on yield and economics of summer groundnut as well as residual effect on succeeding crops during two consecutive summer season of 2018 and 2019 at College of Agriculture, Anand Agricultural University, Jabugam, Gujarat Oxyfluorfen, quizalofop-ethyl, imazethapyr, imazethapyr + imazamox (premix) and fluazifop-p-butyl + fomesafen (premix) were tested as alone, with integration as well as sequential application in comparison with IC fb HW at 20 and 40 DAS and weedy check in randomized block design with three replications. All the weed management practices significantly reduced the density and dry biomass of weeds and increased the pod yield of groundnut. Results revealed that Oxyfluorfen 180 g/ha PE fb IC + HW at 40 DAS provide effective control of weeds at all the intervals with higher pod and haulm yields as well as net return and BC ratio of groundnut followed by Oxyfluorfen 180 g/ha PE fb Imazethapyr 100 g/ha PoE, IC fb HW at 20 and 40 DAS, oxyfluorfen 180 g/ha PE fb Imazethapyr + Imazamox 70 g/ha PoE (premix) and fluazifop-p-butyl + fomesafen 250 g/ha EPoE (premix) fb IC + HW at 40 DAS. The plant stand, plant height and dry matter production of cotton, maize and green gram were not affected by the application of any herbicides in applied in preceding summer groundnut.

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An experiment was conducted at AICRP on Weed Management Farm, B. A. College of Agriculture, Anand Agricultural University, Anand, Gujarat during two consecutive Kharif season of the year 2017-18 and 2018-19 on loamy sand soil. Results indicated that maximum seed yield (2.73 t/ha) and gross realization of Rs. 90145/ha was achieved under IC fb HW at 20 and 40 DAS while net realization of Rs. 51212/ha and BC ratio of 2.51 was recorded under application of propaquizafop + imazethapyr 125 g/ha PoE (PM) closely followed by imazethapyr 100 g/ha PoE fb IC +HW at 30 DAS and fluazifop-p-butyl + fomesafen 250 g/ha PoE (PM). The plant stand, plant height and dry matter production of wheat, chickpea and mustard were not affected by the application of different herbicides in preceding soybean.

An experiment was carried out for two consecutive rabi season of the year 2017-18 and 2018-19 to investigate the "Effect of herbicide combinations on growth, yield and nutrient uptake by weeds in irrigated wheat. Results showed that post emergence application of pre-mix herbicides sulfosulfuron + metsulfuron 30 + 2 g/ha, clodinafop + metsulfuron 60 + 4 g/ha and mesosulfuron + iodosulfuron 12 + 2.4 g/ha recorded significantly lower density and dry biomass of weeds, improve the promising yield attributing viz., number of effective tillers/m 2 , number of total tillers/m 2 , tiller conversion index and grain yield as well as straw yield with minimum nutrient uptake by weeds than other treatments. Sequential application of pendimethalin (PE) 500 g/ha fb sulfosulfuron (PoE) 18 g/ha, twice hand weeding at 20 and 40 DAS and tank mix formulation of sulfosulfuron + 2,4-D (SS) (PoE) 25 + 250 g/ha was stood second best treatment during both the years.

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