Abstract:
An experiment was carried out at the Department of Plant Husbandry, Swedish University of Agricultural Sciences, Uppasala in 1985 to evaluate the effect of a soil-applied herbicide (atrazine) on rye grass (Lolium multiflorum) under different temperature regimes, i.e., 5-15, 10-20, 15-25, 20-30 and 25-30C. Atrazine was applied to the soil in 0.5 litre plastic pots at rates of O(control), 0.4, 0.8, 1.6, 3.2, 6.4 'and 12.8 mg/kg soil. The pots were placed in growth cabinets at the required temperatures and a suitable light intensity of 6000 lux. Pots were watered frequently to keep the adequate moisture level. The number of days for highest emergence increased with a decrease in temperature but the herbicide doses showed only a slight effect on the time of plant emergence. The percentage of survived plants decreased with an increase in the herbicide dose but an increase in temperature decreased the survival percentage. Increase in the herbicide dose decreased the dry weight of rye grass plants but the dry weight of rye grass decreased with an increase in temperature levels. The dry weight of rye grass as a percentage of the dry weight in the control decreased with an increase in herbicide dose, whereas the dry weight percentage increased with a temperature decrease.
Page(s):
1-5
DOI:
DOI not available
Published:
Journal: Pakistan Journal of Weed Science Research, Volume: 3, Issue: 1, Year: 1990