Sorghum (NJ-2647), sunflower (NDSH-1012) and rice (NLR-34449) were grown up to physiological maturity and harvested for preparing plant extracts during Kharif 2017 at Sri Venkateswara Agricultural College, Tirupati, Andhra Pradesh. Plant parts of Parthenium hysterophorus, Lantana camera and Cyperus rotundus were collected from the non-cropped area at flowering. The chopped material of above plants were soaked separately in distilled water for 24 hours at room temperature of 210C at a ratio of 1:10 (w/v) and the same was filtered through 10 and 60 mesh sieve separately. A field experiment was conducted during Rabi 2017-18 in a randomized block design with 10 treatments to evaluate the performance of different plant extracts each applied at 15 L/ha at 15 and 30 DAS and rice straw mulch 5 t/ha for weed management in groundnut. The application of rice straw mulch 5 t/ha was found to be the best followed by sunflower extract spray for obtaining higher pod yield and maximum net returns, besides effective control of weeds in groundnut in view of sustainability and reduce the load of herbicides in the soil, however pre-emergence application of pendimethalin 1.0 kg/ha + HW at 30 DAS produced higher pod yield and net returns.