Browsing by Author "L.P. Misra"

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Effect of herbicides on the carbohydrate and nitrogen contents of nutgrass (Cyperus rotundus L.)
(1975) L.P. Misra; L.D. Kapoor; R.S. Choudhri
The effect of four herbicides on the starch and nitrogen contents of the tubers, dry matter production, carbohydrate, amide, amino, ammonium and nitrate nitrogen contents of the foliage of nutgrass (Cyperus rotundus L.) under pot culture conditions was studied. The starch content of the tubers of nutgrass depleted maximum by the Embutox-plus and Tok E-25 when applied as foliar spray and soil placement, respectively. The foliar application of Embutox-plus and Tok E-25 appeared to have maximum reduction in the carbohydrate and different nitrogen contents in the foliage of nutgrass as compared with other herbicides used. Severe reduction in the amide and amino nitrogen was observed as against ammonium or nitrate nitrogen content on the application of herbicides. © 1975 Indian Academy of Sciences.
Studies on the efficacy of some herbicides on the control of weeds in Japanese mint
(1974) L.P. Misra; L.D. Kapoor; R.S. Choudhri
The present investigation was aimed to evaluate the effectiveness of nine herbicides in the control of weeds associated with Japanese mint (Mentha arvensis) crop. The chemical method of weed control used in this investigation was found to be very effective in preventing weed growth in the mint crop. As a result of herbicidal treatment, the weeds underwent a marked reduction in their dry matter accumulation, coupled with a significant increase in the yield of mint herb and mint oil. Of the different herbicides embutox plus applied as post-emergence treatment and tok E-25 applied in the pre-emergence stage were found to be effective weed-killers, contributing a significant increase in mint foliage and oil yields. Telvar was similarly effective on application at the post-emergence stage. Other herbicides, viz., 2, 4-D and bladex-O also yielded useful responses. © 1974 Indian Academy of Sciences.