Punjab Agricultural University, Ludhiana
Field studies were conducted at the Punjab Agricultural University, Ludhiana during 1973 and 1974 to find out the critical period of mung-weed competition, so that the crop maybe saved from the damaging effect of weeds by giving hoeing or through the application of chemicals. Weeds offered great competition to mung crop and thus reduced yield by 50 per cent. Only one weeding 2 or 6 weeks after- sowing could not help in improving the yield. Weed free condition after 2 or 4 weeks and weed free throughout the crop season were statistically at par with each other. The conventional method and one weeding at 4 weeks after sowing proved quite effective in controlling weeds thus produced good grain yields. Similar trend was observed in yield contributing characters of the crop. From the two years data, it appeared that the critical period of crop weed competition in this crop was 4th to 6th weeks after sowing.
