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Background: Groundnut encounters severe infestation of weed especially during the early stages of growth due to less crop canopy which allows higher weeds growth and thus crop becomes more susceptible to weed competition. During rainy season, effective and economical weed control is not possible through manual and mechanical weeding due to unfavorable soil conditions and also the unavailability of costly labours. Herbicides have been accepted as cost effective tool to manage weed menace in groundnut. The current study aims to study the efficancy of different post-emergence and pre-mix combination of post-emergence herbicides on weeds, growth and yield of groundnut. Methods: The field experiment was conducted at AICRP Weed Management field, Department of Agronomy, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola (M.S.) during three consecutive Kharif seasons of 2015- 2017. The experiment was laid out in Randomized Block Design with ten treatments replicated thrice. The treatments comprised of one pre emergence and five different post emergence herbicides and compared with weed free and weedy check. Result: The results revealed that weed free was found most effective to control weeds in groundnut with lowest weed count, weed dry matter of weeds and maximum gross monetary returns (Rs.117641/ha), net monetary returns (Rs.80894/ha). Among the herbicides, application of Imazethapyr + Imazomox 0.10 kg /ha POE 20 DAS produced less weed count and weed dry matter and highest weed control efficiency (80.68%) and lower weed index (6.71% ) as well as maximum growth, yield attributes and pod yield in groundnut over all the other herbicidal treatments viz. plant height (30.25), dry matter accumulation (18.11g), number of pods/plant (32.35) and pod yield (2448 kg/ha) and highest pooled B:C ratio (3.74).

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A systematic survey of 240 soybean growers on adoption of herbicide application practices was conducted in Akola, Buldana, Washim, Amravati, Yavatmal and Wardha districts of Vidarbha during 2013-14 as University Research Review Committee Project. The study revealed that out of 240 selected farmers 221 (92.08%) farmers applied herbicide in soybean crop. Knowledge about the recommended per ha doses of herbicides was not known to 57.08 % farmers. Power spray is never used for spraying of herbicides was not known to 29.17 % farmers in study area. Knowledge about calibration of spray pump was not noted in majority (97.08%) farmers. Use of 500 L water per ha for herbicide application in Soybean crop is not known to more than three fourth (77.50%) per cent farmers. Overall majority 61.25 % farmers have medium level of knowledge about selected 14 herbicide application practices for soybean crop. In selected districts Imazethapyr were more popular among majority (78.28 %) herbicide adopters in soybean crop, followed by 15.85 % farmers used Imazethapyr + Imazamox. Knapsack sprayer used by 61.54% farmers and power sprayer used by 38.46 % farmers for application of herbicides in soybean. Out of the total 85 (38.46%) power sprayer users majority 73 (85.88 %) farmers have not get effective control over weeds in soybean crop. Majority 88.69 % adopter farmers used less than recommended 500 liters of water/ha for herbicide application in soybean. Use of power sprayer and low quantity of water maintained at the time of herbicide application may be the causes of poor results at farmer’s level.

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