Effect of weed management in rice (Oryza sativa) and its carryover effect on succeeding blackgram (Phaseolus mungo) crop
DOI:
https://doi.org/10.59797/ija.v44i3.3539Keywords:
Weed management, Rice, Carryover effect, BlackgramAbstract
An experiment was conducted during rabi and summer seasons of 1993-95 to study the direct and carryover effect of herbicides in rice (Oryza sativa L.)- blackgram (Phaseolus mungo L.) cropping sequence. Two pre-transplanting spray of glyphosate (1.5 kg ailha at each spray) with oxyflourfen (pre-emergence) 0.1 ail ha + handweeding (40 DAT) being statistically on par with two pre-transplant spray of glyphosate 1.5 ailha+ oxyfluorfen (pre-emergence) 0.1 ailha+ 2,4-D sodium salt 0.75 ailha post-emergence (21 DAT) and 2 pre-transplanting of spray of glyphosate + 2 handweedings (20 and 40 DAT) proved significantly superior to any of these 3 . treatments without glyphosate in reducing weed population and their dry weight, - thus resulting in highest rice grain yield (5.6 tlha). Carryover effect of rice herbicides on the succeeding blackgram was not significant in controlling grass and broad- leaved weeds. However, sedge population in blackgram under glyphosate was significantly lower resulting in lesser weed dry weight than that of no glyphosate and gave significantly higher blackgram seed yield (10.1 tlha).References
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Doll, J.D. and Piedrahita, W. 1981. Effect of glyphosate on the sprouting of Cyperus rotundus L. tubers. Weed Research 22 :123-
Mandal, B.K. and Ghorai, A.K. 1986. Relative efficiency of selected herbicides for controlling weeds in transplanted rice. Oryza 23 :242-
Raju, R.A. and Reddy, M.N. 1986. Comparative efficiency of herbicides for weed control in tt-ansplanted rice. Journal of Research, Andhra Pradesh Agricultural University 14 :75-76.
Sharma, A.R. and Reddy, M.D. 1992. Effect of method of sowing and weed control practice on
performance of rice (Oryzasativa)under inter- mediate deep-water condition. Jouml of Ag- ricultural Sciences 62 (1) :24-28.
Singh, G. and Singh, O.P.1993. Chemical weed control in low land transplanted rice under puddled conditions. Annals of Agricultural Research 14 :229-231.
Srivastava, A.S., Vaishya, R.D. and Singh, S.S. 1994. Studies on residues of herbicides in post harvest soil of paddy by bioassay technique. (In)
NBiennial Conference, Indian Society of Weed Science, 9- 10 February 1995, Faculty of Agri- culture, Annamalai University :p. 141.
Zie, R.M., Mahadkar, K.V., Kahmirlkar, S.A., Patil, R.A. and Ramteke, J.R. 1994. Residual effect of nitrogen and herbicides in rice-maize cropping system. (In) N Biennial Conference, Indian Society of Weed Science, 9-10 February 1995, Faculty of Agriculture, Annamalai Uni- versity :p. 149.
