. Studies in experimental screenhouse
Another experiment was performed to study the effect of Artemisia oil on 6-week-old weed plants raised under controlled conditions in experimental screenhouse.
Plants of all the test weeds were raised from the collected seeds in 12cm diameter earthenware pots. Pots were filled with 750 g garden soil (soil:sand:manure: 3:1:1, w/w) and seven seeds of each weed species were sown per pot.
Two-week after emergence, pots were thinned to 5 equal-sized healthy plants per pot. Plants were watered daily and after 3 weeks they were flushed with halfstrength Hoagland nutrient solution (Hoagland and Arnon, 1950).