Evaluation of Herbicidal Potential of Eucalyptus spp for Biological Control of Dactyloctenium aegyptium L.
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Dactyloctenium Aegyptium L., Eucalyptus, Herbicidal, Biological Control
Abstract
Pots culture experiment was conducted to evaluate the herbicidal potential of Eucalyptus spp. (aceae) on the growth of Dactyloctenium aegyptium L. (Poaceae). Leaves extracted with concentrations of 10, 20, and 40% of Eucalyptus plant were applied as soil and foliar application to seeds and seedlings of D. aegyptium species. The result indicated that the application of Eucalyptus leaves extracts caused a significant reduction in germination traits, root and shoot length, and seedling fresh and dry weights. Also, the result revealed that the inhibitory effect of eucalyptus extract on D. aegyptium L was more noticeable in plant growth traits than on germination traits. Results show that among the different concentrations of Eucalyptus leaf extracts used in this study, 40% was the most toxic and caused the significant effect on germination and growth traits of Dactyloctenium aegyptium. Application of 40% of eucalyptus leaf extract decreased germination percentage by 30%, mean daily germination by 45%, and shoot length by 38%. root length by 54%, number of branches by 61%, number of leaves by 59%, seedling fresh weights by 23%, seedling dry weights by 62%, and seedling vigor index by 60%. The results of this study concluded that the use of Eucalyptus plants has the potential to be developed further as a bio-herbicide system to control weeds such as Dactyloctenium aegyptium L. However, more research is needed to evaluate the negative impact of eucalyptus on crop growth.
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References
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