Paper Details

Bio-control of  velvet leaf (Abutilon theophrastii)  and  field bindweed (Convolvulus arvensis)  by essential oil of  sweet bay (Laurus nobilis) as an inhibitor of seed germination

Ghader Asgharian, Bahram Mirshekari, Ebrahim Khalilvand Behrouzyar

DOI: https://dx.doi.org/10.12692/ijb/4.8.71-77

Int. J. Biosci. 4(8), 71-77. April, 2014. (PDF)

Abstract:

In order to study bio-controlling posibility of velvetleaf (Abutilon theophrastii) and field bindweed (Convolvulus arvensis) by essential oil of sweet bay (Laurus nobilis) two laboratory and greenhouse experiments were conducted in Tabriz, Iran during 2013. Studied treatments in this part of our experiment were essence concentrations of (Laurus nobilis) as 0, 100, 200, 300 and 400 ppm. The stepwise regression analysis carried out for the data obtained to test the significance of the independent variables affecting the seedling vigor index. Mean comparisons indicated that 10 days after beginning of experiment 69% of field bindweed seeds germinated, but only 66.8% from velvetleaf seeds. With increasing of essential oil concentration more than 200 ppm as well as control one leaves number per plant reduced 17.5%. Leaf area per plant ranged from 13.5 cm2 in 200 ppm essential oil concentration to 9.7 cm2 in means of 300 ppm and 400 ppm. With increasing of essence concentration from 200 ppm seedling biomass reduced significantly. We concluded that higher studied concentrations of Laurus nobilis essential oil had high potential in controlling of velvetleaf (Abutilon theophrastii) and field bindweed (Convolvulus arvensis). The stepwise regression analysis verified that the final germination percentage, seedling biomass and leaf area per plant of both weeds had a marked increasing effect on their seedling vigor index.