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The Quantitative Effect of Tree Locust (Anacridiumm m. melanorhodon) Infestation and Artificial Defoliation on Gum Arabic Production
Current Issue
Volume 4, 2017
Issue 5 (October)
Pages: 46-51   |   Vol. 4, No. 5, October 2017   |   Follow on         
Paper in PDF Downloads: 30   Since Sep. 24, 2017 Views: 1166   Since Sep. 24, 2017
Authors
[1]
Ahmed Ismail Ahmed Safi, Institute of Gum Arabic Research and Desertification Studies, University of Kordofan, Elobied, Sudan.
[2]
El Sayed El Bashir Mohamed, Crop Protection Department, Faculty of Agriculture, University of Khartoum, Khartoum, Sudan.
[3]
Ammna Ahmed Hamid, Remote Sensing and Seismology Authority, National Center for Research, Khartoum, Sudan.
Abstract
The present study was conducted in two locations in Acacia Agricultural Company (Nawa and Elrahad locations) for three successive seasons; (2007/2008, 2008/2009 and 2009/2010), 37 km south east El obied city, North Kordofan State. The objective is to access the effect of tree locust infestation and artificial defoliation on gum Arabic production. Experiments were conducted, where four blocks were chosen randomly, and the following treatments were arranged in a randomized complete block design: control (no defoliation), light natural defoliation, moderate natural defoliation, high natural defoliation, light artificial defoliation, moderate artificial defoliation and high artificial defoliation. Natural defoliation is done by tree locust while artificial defoliation is done by spraying with ethereal. The control and the trees in other treatments which were not naturally or artificially defoliated were sprayed weekly using neem seed water solution extract. The results revealed that tree locust infestation and the artificial defoliation of trees severely reduced gum production. In both natural and artificial defoliation the quantity of gum produced decrease with increase of the level of infestation and the reduction was highly significant (P≤0.001) between means of all treatments except between high natural defoliation and high artificial defoliation. There was a negative correlation between gum production and levels of defoliation.
Keywords
Tree Locusts, Acacia Senegal, Defoliation, Gum Arabic
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