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Field experiments were conducted for two years at wetland farm, Tamil Nadu Agricultural University, during Kharif seasons of 2014 and 2015 (June to October) to evaluate the penoxsulam (21.7% SC) for weed control in rice. Based on two years data, it was found that pre-emergence application of penoxsulam 22.5 g/ha resulted in significantly lower total weed density, weed dry weight and higher weed control efficiency at all the intervals. Application of penoxsulam could keep the weed density and dry weight below the economic threshold level and increase grain yield of 5.21 and 5.04 t/ha was obtained in 2014 and 2015, respectively. Unweeded control accounted for lower grain yield and higher weed index of 48.7 and 60.8%, respectively.

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Field experiments were conducted at Annamalai University, Annamalai Nagar to study the influence of vermiwash on the growth, yield attributes and nutrient uptake of rice during Navarai 2013 (January to April) and Kuruvai 2013 (June to September). The experiment was laid out in randomized block design with three replications. These were eleven treatments involving panchakavya, fish amino acid and vermiwash sprayed at different concentrations and time. The results of the study revealed that foliar application of vermiwash @ 5% at tillering and flowering stages had resulted in significantly better plant growth in terms of plant height, number of tillers and dry matter production, higher number of yield attributes, grain and straw yield. This was followed by fish amino acid @ 3% at tillering and flowering. Foliar application of vermiwash @ 5% at tillering and flowering resulted in significantly increased nutrient uptake in rice.

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