Ebrahim Rais Mohammadi; Hasan Mohammad Alizade; Mohammad Ali Baghestani Meibodi; Mostafa Arab
Volume 13, Issue 1 , August 2011, , Pages 43-54
Abstract
A field experiment was conducted at College of Aburaihan, University of Tehran, Iran in 2007 to evaluate the herbicides efficacy in a marigold nursery to control weeds including annual flowers. Experimental design was a RCBD with total 12 treatments replicated four times. Treatments were trifluralin ...
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A field experiment was conducted at College of Aburaihan, University of Tehran, Iran in 2007 to evaluate the herbicides efficacy in a marigold nursery to control weeds including annual flowers. Experimental design was a RCBD with total 12 treatments replicated four times. Treatments were trifluralin preplant incorporated at two and three Li/ha, trifluralin preplant non incorporated at two and three Li/ha, oxyfluorfen preplant at two and three Li/ha, oxyfluorfen postemergence at two and three Li/ha and cholorothol-dimethyl preplant at 10 Kg/ha, two-times hand weeding, weedy and weed free treatments were also included as control. Application of oxyfluorfen preplant and trifluralin preplant at both rates of two and three Li/ha controlled weeds by 70 percent. This treatment had no phytotoxic effects on marigolds and did not reduce their yields either. Among applied herbicides, application of non-soil incorporated trifluralin treatment compared with treatment of the same soil incorporated with herbicides, due to easier application, indicated its preference and also had no phytotoxic effects on marigold.
Mahmoud Shoor; Yahya Selahvarzi; Sahar Bostani
Volume 12, Issue 2 , November 2010, , Pages 25-35
Abstract
To evaluate the effect of high Co2 concentration on three ornamental plants belong to Asteraceae family, all with different morphological characteristics, namely: Marigold (compound leaves), Floss flower (opposite leaves) and Blanket flower (rosette leaves), an experiment was conducted in 2007 at Ferdosi ...
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To evaluate the effect of high Co2 concentration on three ornamental plants belong to Asteraceae family, all with different morphological characteristics, namely: Marigold (compound leaves), Floss flower (opposite leaves) and Blanket flower (rosette leaves), an experiment was conducted in 2007 at Ferdosi university - Iran. Four levels of Co2 (350 as control, 700, 1050 and 1400 µl/l), as well as three plant genotypes were used as factorial arrangement based on a complete randomized design with three replications. The results showed that all studied traits were affected by Co2, plant genotypes and their interactions. Increasing Co2 concentration to 700 µl/l led to higher stomata density, epidermal cell density, stomata length, and guard cell length in all three plant genotypes. The results also showed that marigold (compound leaves) had the maximum values for stomata density, epidermal cell density, as well as stomatal index. Maximum stomata length occurred in Floss flower (opposite leaves) and maximum length and width of guard cell were observed in Blanket flower (rosette leaves).