Survey of insect-pests of citrus crop in Eritrea


  • A Haile Hamelmalo Agricultural College
  • T Mesghena Ministry of Agriculture
  • S Nuredin Ministry of Agriculture
  • M Yemane Ministry of Agriculture


citrus, survey, insect-pest, natural enemies


Citrus is the main fruit crop in Eritrea with the main citrus species being orange, lemon and mandarin that are produced in 2064, 328 and 17 ha, respectively. The production and productivity of these fruit crops are affected by several pests. Citrus pest survey was conducted in major citrus growing regions of the country with the objectives to assess the type of citrus insect-pests in the different areas, study the natural enemies of the citrus pests and assess the nature of pest damage on the fruit crop. Pest assessments and counts by species were done using hand lenses under field condition and microscope in laboratory. The result of the study showed that citrus is affected by 21 different species of arthropods out of which 19 are insect species and the remaining 2 species are Acarina (mites). The insect pests cause citrus tree damage at different stage and on different parts of the tree such as leaves, stem, fruit and root. Of the 21 species, six are major pest and the remaining 15 species are minor pests. The six important pests are leaf miner, red scale, black scale, fruit fly, whitefly and red spider mites. Leaf miner, fruit fly and red spider mites were observed in all citrus production areas while the remaining three species were recorded in limited areas. Black and red scales incidence and severity were high in Hamelmalo, Elabered, Alla, and Durfo. Fruit fly is the main pest of citrus throughout the fruit producing areas of the country, threatening its production and cause 20-40 percent fruit dropping and rotting.


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Adugna H. 2014. An Annotated list of Field Insect Pests, Storage Pests and Acarina in Eritrea, Hamelmalo Agricultural College.

Andemeskel WH. 1987. Handbook of insect pests of major crops in Eritrea Administrative Region of Ethiopia and their control, Asmara University.

Crow, T & Shitay GM. 1977. Crop pest Handbook. Institute of Agricultural Research, Ethiopia.

Crow T, Taddesse GM & Tsedeke A. 1975. An Annotated list of Field Insect Pests, in Ethiopia, Institute of Agricultural Research, Ethiopia.

Goosens PA, Adhanom N & Tsedeke A. 1981. Armourd scale on citrus in Ethiopia.Their identification and control. Institute of Agricultural Research Ethiopia, 1981.

Hill D & Waller JM. 1985. Pests and diseases of Tropical Crops. Vol. 1: principles and methods of control. Intermidiate Tropical Agriculture. Longmans, ISBN 0582 606144 London, 1985.

Hill D. 1974. Agricultural insect pests in the tropics and their control. Cambridge University press ISBN 0521 24628 5, London, 1974.

ISPM 6. 2016. Guidelines for Pest Surveillance. International Plant Protection Convention, FAO, Rome, 1997

James K. & Munyaradzimukoni. 2017. Fruit fly control in Kenya. Spore: No. 185, June-August 2017.

Pinhey ECG. 1968. Introduction to insect study in Africa. Oxford University Press, London 1968.

Tsedeke A. 1985. A Review of crop Protection Research in Ethiopia. Proceedings of the First Ethiopian crop protection Symposium. Institute of Agricultural Research, Ethiopia.

Tsedeke A. 1984. Observations on populations of red Scale Aonidirlla aureantii and its Natural Enemies on citrus at Koka. Ethiopian Journal of Agricultural Sciences, 2: 102-114.

Singh KI, Dilip RK, Sanatomba A & Haldhar SM. 2021a. A case study of insect pests responsible for mass citrus decline in Manipur and their control remedies. J. Appl. Zool. Res., 32 (2): 187-195.

Gora JS, Chet Ram, Poonia PK, Choudhary M & Haldhar SM. 2022. Polyploid rootstocks in citrus for mitigation of biotic and abiotic stresses: A review. Journal of Agriculture and Ecology, 13: 1-19.

Singh S, Sandhu RK and Haldhar SM. 2021b. Biodiversity and integrated management of insect and mite pests of citrus in India In: Souvenir-cum-abstracts book: National Seminar on Conservation and Commercialization of Citrus Biodiversity in NEH Region (Eds. Singh SB, Dilip Singh RK, Haldhar SM, Piloo Ng, Sarangthem I and Hazarika BN). Pub: Directorate of Research, CAU, Imphal, pp. 151-165; ISBN: 978-81-947184-2-0.

Singh S, Sandhu RK, Haldhar SM, Reddy PVR, Deka S, Reddy DS, Irulandi S, Shete MH, George A, Singh V, Siraj M & Patil P. 2021c. Integrated pests management in citrus crops. In: Pest Management in Dryland Horticultural Crops (Eds. Haldhar SM and Maheshwari SK). Biotech Books, pp: 243-268; ISBN: 978-81-7622-491-8.

Gora JS, Kumar R, Chet Ram, Berwal MK & Haldhar SM. 2021. Citrus decline and its management in arid region. In: Pest Management in Dryland Horticultural Crops (Eds. Haldhar SM and Maheshwari SK). Biotech Books, pp: 269-280; ISBN: 978-81-7622-491-8.

Haldhar SM & Deshwal HL. 2017. Fundamentals of Agriculture Entomology. New vishal publication, New Delhi pp: 1-452, ISBN: 819333970-3.




How to Cite

Haile, A., Mesghena, T., Nuredin, S., & Yemane, M. (2022). Survey of insect-pests of citrus crop in Eritrea. Journal of Agriculture and Ecology, 14(14), 44–55. Retrieved from