University of Khartoum

A Method for Detection of Desert Locust, Schistocerca gregaria (Forskal)and Estimation of Infested Areas

A Method for Detection of Desert Locust, Schistocerca gregaria (Forskal)and Estimation of Infested Areas

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Title: A Method for Detection of Desert Locust, Schistocerca gregaria (Forskal)and Estimation of Infested Areas
Author: Ibrahim, Essam Mahmoud
Abstract: This study aims to evaluate the current methodologies of ground survey operations of desert locust, and attempts to introduce improvements, which increase the efficiency of the survey process. The general objectives of this study are improving the methods of detecting of desert locust infestations, and upgrading the capacity of desert locust management. The trials of this research were conducted by using computer software and applying principles of geometry to devise an improved ground survey method, and field test the proposed survey method and compare it with the current survey methods. The field trials were conducted in the Red Sea areas, Delta Tokar and north Kordofan province (in Sudan). Three methods of foot surveys were tested, (current foot transect, the modified foot transect method developed by Ghaemain (2002), and the proposed foot transect), the area unit of these methods for the test was one hectare. Besides, two methods of vehicle surveys were conducted at an area unit of one square kilometre (current vehicle transect, and the proposed vehicle transect). The methods were performed on both natural populations of desert locust and charcoal heaps to simulating stationary locust groupings. The results indicated that desert locust officers could be able to detect the stationary locust groupings at 5 meters on each side of the transect line, when they perform the foot transect survey, but they should not depend heavily on counting the number of locusts by vehicle, as that method appeared to be less accurate. In addition performing the proposed methods of survey (by foot or vehicle), enabled the locust officers to cover more area of the surveyed or infested area, than other tested methods. However, the time taken to perform the proposed method was longer when compared with the other methods of survey. However, in most cases, it was found that increasing the number of locust officers or vehicles, leads to increase the detection percentage of locusts. Moreover, locust officers should determine the surveyed areas by using special software tools that to determine the areas more accurately than the visual estimations. These findings could improve the efficiency of the desert locust survey operations, which are needed to increase the capacity of the current preventive desert locust control strategy.
Description: 2006
URI: http://khartoumspace.uofk.edu/handle/123456789/11221
Date: 2015-05-21


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