Effect of Eucalyptus camaldolensis allelopathy on Malva sylvestris Physiological Parameters

Banafsheh Heidari Koholi¹ Mohammad Hassan Assareh² Shoukufeh ‎Enteshari³ Anahita Shariat⁴

1) Master of Science, Payame Noor University, Najafabad, Iran ‎‏ ‏‎ Email:
2) Scientific board, Seed and Plant Certification and Registration Institute, Karaj, Iran Email:
3) Scientific board, Payame Noor University, Najafabad, Iran Email:
4) Scientific board, Research Institute of Forests and Rangelands, Tehran, Iran ‎ Email:

Publication : 3rd International Conference on New Research & Achievements in Science, Engineering & Technologies(setbconf.com)
Abstract :
The use of allelochemicals as natural herbicides is a new strategy to mitigate the harmful effects of chemical herbicides on the environment and to prevent weed resistance to them. In this study, the allelopathic effect of Eucalyptus camaldolensis leaves and roots on Festuca ovina was tested in greenhouse conditions in 2008 at the Research Institute of Forests and Rangelands‎. This study was conducted as a completely random design with three repetitions and the means were comparing using Duncan s test at the level of 0.05. The greenhouse stage treatments included the control group and various quantities/doses of dried leaf powder (5, 10, 15 grams), fresh leaf powder (5, 10, 20 grams), ethanolic extract of leaves (3, 6, 12 grams per liter), aqueous extract of dry leaves (at 5%, 10%, and 15% concentrations), aqueous extract of fresh leaves (10% and 20% concentrations), and root secretions. The ethanolic extract of dry leaves (3, 6, 12 g/liter) was sprayed on the leaves of some pots. This study measured dissolved sugar levels, the number, length, and width of stomata on the underside of the leaf, as well as the leaf s upperside. The results from the greenhouse stage indicated that the ethanolic extract had the most inhibitory effect on all the measured traits. Both the fresh and dry leaf aqueous extracts also showed an inhibitory effect, with a corresponding decrease in the measured parameters. The fresh and dry leaf powders served as a covering layer and effectively prevented moisture from escaping. We also studied the impact of root secretions on one-year-old eucalyptus seedlings in pots, and in this instance, the secretions completely prevented seed germination.
Keywords : Allelopathy Eucalyptus camaldolensis Festuca ovina physiological parameters dissolved sugar