University of Khartoum

Evaluation of Four Methods for Monitoring the Population of Desert Locust Schistocerca gregaria (Forskal) in the Red Sea Coast, Sudan

Evaluation of Four Methods for Monitoring the Population of Desert Locust Schistocerca gregaria (Forskal) in the Red Sea Coast, Sudan

Show full item record

Title: Evaluation of Four Methods for Monitoring the Population of Desert Locust Schistocerca gregaria (Forskal) in the Red Sea Coast, Sudan
Author: Adam, Ibrahim Guma Mohammed
Abstract: The aim of this study was to develop an improved field survey technique for desert locust (solitary adults and hoppers); in comparison to the conventional method. Three methods (10 m ×10, 20 m×5 and 50 m×2) were tested, beside the conventional method (100 m) in the Red Sea coast during the winter of 2012 and 2013. The study area extended from Tokar delta (N 18º 25´ 35.5˝ E 37º 43´ 52.3˝) to Karora (N 17º 41´ 51.3˝ E 38º 21´ 51.2˝) and Oko area (N12ً 27َ 20ْ E 3532ً 48َ º) at one hundred and fourteen locations representing different desert locust habitats (plain, dunes and wadies). The results showed that the method designated as 20 m ×5 where the mean of located locusts was 62.00 in tokar and 16.50 in Oko were highly significant compared to the conventional method of 100 m (means were 36.00 in Tokar and 7.50 in Oko). The same was evident in the method of 10 × 10 m (means 28.75 in Tokar and 6.00 in Oko) and the method of 50× 2 m (means 31.75 in Tokar and 11.00 in Oko). However, there was no significant difference between the four methods with regard to application time (means application time for method designated as 20 ×5 m was 38.14 in Tokar and 13.48 in Oko. In conventional method it was 38.98 in Tokar and 11.50 in Oko. In the method designated as 10 × 10 m it was 38.34 in Tokar and 6.00 Oko and in the method designated as 50× 2 m it was 38.69 in Tokar and 11.68 in Oko). When there were no solitary locusts in the field, charcoal was used to simulate hoppers and the four methods were applied to detect the charcoal. Thus the detected charcoal and the application time for each method were recorded. The results showed that in the method as 20 ×5 m, the means was 12.50 and significantly high compared to the conventional method 100m where the mean was 7.50. The means were 9.00 and 7.35 in the method 10 × 10 m and 50 ×2 respectively. These means were not significantly different from the means obtained in the conventional method 100m. There was insignificant difference between the methods with regard to the detection time (mean application time for the method designated as 20 ×5 m was 1.17, in the conventional method it was 1.22 and 1.11 and 1.11 in the methods designated as 10 × 10 m and 50 ×2 respectively
Description: 75 page
URI: http://khartoumspace.uofk.edu/handle/123456789/17926
Date: 2015-12-22


Files in this item

Files Size Format View

This item appears in the following Collection(s)

Show full item record

Share

Search DSpace


Browse

My Account