The Locust Populations in Inland areas of Yemen to Increase in Next Two Months | No.55 Report of Monitoring and Assessment of Desert Locust in Africa and Asia Issued by AIRI-CAS and CBCGDF

On April 19, 2024, No.55 Report of Monitoring and Assessment of Desert Locust in Africa and Asia was jointly released by the Team of Prof. Huang Wenjiang, Associate Prof. Dong Yingying from Aerospace Information Research Institute, Chinese Academy of Sciences (CAS) and China Biodiversity Conservation and Green Development Foundation (CBCGDF).

 




Integrated with multi-source Earth Observation data, e.g. meteorological data, field data, and remote sensing data (such as the MODIS in the US and SDGSAT-1 in China,), and self-developed models and algorithms for Desert Locust monitoring and forecasting, the research team constructed the ‘Vegetation pests and diseases monitoring and forecasting system, which could regularly release thematical maps and reports on Desert Locust.

 

This report focuses on the dynamic updates of desert locust monitoring and loss assessment in Saudi Arabia and Yemen. The remote sensing monitoring results showed that, in March 2024, desert locusts were primarily distributed in the western regions of Saudi Arabia and the southwestern regions of Yemen, with areas of vegetation affected reaching 14.3 thousand hectares and 26.4 thousand hectares respectively. It is expected that over the next two months, rainfall will decrease along the coasts of the Red Sea and the Gulf of Aden, leading to drier vegetation conditions unsuitable for the survival and reproduction of desert locusts. As a result, the population of locusts in the western regions of Saudi Arabia and the southwestern regions of Yemen is expected to decrease. Concurrently, due to increased rainfall in the inland areas of Yemen, locust swarms in the southwestern regions of Yemen will migrate inland and undergo minor reproduction, leading to an increase in locust population in the inland areas of Yemen.

 

In March 2024, the number of desert locusts within Saudi Arabia decreased due to control measures. The monitoring results showed that in March, the total damaged vegetation area was 14.3 thousand hectares in Saudi Arabia, including 1.7 thousand hectares of cropland,4.2 thousand hectares of grassland, and 8.4 thousand hectares of shrub (Figure 1).


 

In March 2024, desert locusts within Yemen were primarily distributed in the southwestern regions, where reduced precipitation hindered their survival and reproduction. As a result, there was a slight decrease in the number of locusts in that area. The monitoring results showed that in March, the total damaged vegetation area was 26.4 thousand hectares in Yemen, including 4.7 thousand hectares of cropland, 9.4 thousand hectares of grassland, and 12.3 thousand hectares of shrub (Figure 2).



 This study simultaneously utilized SDGSAT-1 satellite remote sensing data to monitor disaster situations in severely affected areas of southwestern Yemen (Figure 3). Region 1 is located in the southwestern part of Dhamar province. The total vegetation area in Region 1 is 30.75 thousand hectares, with shrubland being the primary affected type. Region 2 is situated in the central part of Ta'izz province. The total vegetation area in Region 2 is 33.14 thousand hectares, with a total affected vegetation area of 4.55 thousand hectares.



The comprehensive analysis shows that, in the next two months, the population of locusts in the western regions of Saudi Arabia and the southwestern regions of Yemen is expected to decrease. Concurrently, due to increased rainfall in the inland areas of Yemen, locust swarms in the southwestern regions of Yemen will migrate inland and undergo minor reproduction, leading to an increase in locust population in the inland areas of Yemen.

 

CBCGDF has always been contributing to this study and the series report aims to help developing countries in Asia and Africa fight invasive species and safeguard food security. The results of the report have been shared with developing countries in Southeast Asia and Africa for free, helping them improve their capability to control the impacts of desert locusts.

 

[Download the report:]

http://en.rscrop.com/Private/NewsImgs/638491270324180803119651260.pdf

 

Translator: Sara

Checked by: Daisy

Editor: Sara    

Contact: v10@cbcgdf.org; +8617319454776

 



 


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