JOURNAL OF AGRICULTURAL SCIENCE AND PRACTICE
Integrity Research Journals
ISSN: 2536-7072
Model: Open Access/Peer Reviewed
DOI: 10.31248/JASP
Start Year: 2016
Email: jasp@integrityresjournals.org
Diversity of scale insects (Hemiptera: Coccomorpha) attacking citrus trees in Machakos, Makueni, Kilifi and Kwale Counties, Kenya
https://doi.org/10.31248/JASP2021.275 | Article Number: BF9F1A022 | Vol.6 (3) - June 2021
Received Date: 26 April 2021 | Accepted Date: 15 May 2021 | Published Date: 30 June 2021
Authors: Githae Michael* , George O. Ong’amo , John Nderitu , Gillian W. Watson and Wanja Kinuthia
Keywords: diversity, Kenya, mealybugs, soft scales., Armored scales
Citrus farming is a major source of revenue for large and small-scale farmers in Kenya. Citrus production is confronted with threats from pests and diseases. Surveys of citrus farms in Kilifi, Kwale, Machakos and Makueni counties, Kenya in July/August (dry season) and in November/December (wet season), 2019 were conducted to identify scale insect pests (Hemiptera: Coccomorpha) attacking the trees (Sapindales: Rutaceae), and their related biota. A total of 22 scale insect species belonging to four families, namely Diaspididae (armoured scales), Coccidae (soft scales), Pseudococcidae (mealybugs), and Monophlebidae (giant mealybugs) were found infesting citrus trees in the two regions surveyed. Among the scale insects reported, four species were newly introduced in Kenya; three armoured scales Parlatoria ziziphi (Lucas), Parlatoria pergandii (Comstock), Aonidiella comperei (McKenzie), and a soft scale, Pulvinaria polygonata (Cockerell). The scale insects were closely associated with predators (coccinellids and lacewings) and attendant ants. This information will be helpful in the development of efficient management strategies against the scale insect pests, thus improving citrus production in Kenya. The scale insect pests identified in this study will be useful to plant quarantine facilities in Kenya to help to prevent and detect accidental introductions of exotic scale insect species.
| Bates, D., Mächler, M., Bolker, B., & Walker, S. (2015). Fitting linear mixed-effects models using lme4. Journal of Statistical Software, 67(1), 1-48. Crossref |
||||
| Bhagat, R. C., & Qureshi, A. A. (2016). Biodiversity and annotated checklist of scale-insects, and Mealybugs (Hemiptera: Coccoidea) of Jammu, Kashmir and Ladakh (North-west Himalaya), India. International Journal of Current Research and Academic Review, 4(3), 56-62. Crossref |
||||
| Buss, E. A., & Dale, A. (2016). Managing scale insects on ornamental plants 1. University of Florida, IFAS Extension, ENY323. Pp. 1-6. Link |
||||
| Camacho, E. R., & Chong, J. H. (2015). General biology and current management approaches of soft scale pests (Hemiptera: Coccidae). Journal of Integrated Pest Management, 6(1), 1-22. Crossref |
||||
| Dagnew, A., Belew, D., Admassu, B., & Yesuf, M. (2014). Citrus production, constraints and management practices in Ethiopia: The case of Pseudocercospora leaf and fruit spot disease. Science, Technology and Arts Research Journal, 3(2), 4-18. Crossref |
||||
| Franco, J. C., Suma, P., Da Silva, E. B., Blumberg, D., & Mendel, Z. (2004). Management strategies of mealybug pests of citrus in Mediterranean countries', Phytoparasitica, 32(5), 507-522. Crossref |
||||
| García Morales, M., Denno, B. D., Miller, D. R., Miller, G. L., Ben-Dov, Y., & Hardy, N. B. (2016). ScaleNet: A literature-based model of scale insect biology and systematics. Database: The Journal of Biological Databases Curation, Vol. 2016, Article ID bav118, Pp. 1-5. Link |
||||
| Gebreslasie, A., & Meresa, H. (2018). Identification of insect and disease associated to citrus in Northern Ethiopia. African Journal of Microbiology Research, 12(13), 312-320. Crossref |
||||
| Gitahi, D. W. (2018). Evaluation of knowledge and practices of managing citrus pests and diseases and the willingness to pay for an integrated pest management strategy in selected Counties in Kenya (Doctoral dissertation, Egerton University). | ||||
| Gullan, P. J., & Cook, L. G. (2007). Phylogeny and higher classification of the scale insects (Hemiptera: Sternorrhyncha: Coccoidea). Zootaxa, 1668, 413-425. Crossref |
||||
| Gullan, P. J., & Martin, J. H. (2009). Sternorrhyncha (jumping plant-lice, whiteflies, aphids, and scale insects). In: Encyclopedia of insects (pp. 957-967). Academic Press. Crossref |
||||
| Hassan, N. A., Radwan, S. G., & El-Sahn, O. M. N. 2012. Common scale insects (Hemiptera: Coccoidea) in Egypt. Egyptian Academic Journal of Biological Science, 5(3), 153-160. | ||||
| Heya, H. M., Khamis, F. M., Onyambu, G. K., Akutse, K. S., Mohamed, S. A., Kimathi, E. K., Ombura, F. L. O., Ekesi, S., Dubois, T., Subramanian, S., & Tanga, C. M. (2020). Characterization and risk assessment of the invasive papaya mealybug, Paracoccus marginatus, in Kenya under changing climate. Journal of Applied Entomology, 144(6), 442-458. Crossref |
||||
| Jendoubi, H. (2018). The scale insect fauna of citrus in Tunisia: a critical overview. International Journal of Fauna and Biological Studies, 5(3), 169-178. | ||||
| Kapranas, A., Morse, J. G., Pacheco, P., Forster, L. D. & Luck, R. F. (2007). Survey of brown soft scale Coccus hesperidum L. parasitoids in southern California citrus. Biological Control, 42(3), 288-299. Crossref |
||||
| Kilalo, D. C. (2004). Survey of the arthropod complex and monitoring and management of homopteran pests of citrus (Citrus spp) and their natural enemies (Doctoral dissertation, University of Nairobi). | ||||
| Kilalo, D., Olubayo, F., Obukosia, S., & Shibairo, S. I. (2009). Farmer management practices of citrus insect pests in Kenya. African Journal of Horticultural Science, 2,168-176. | ||||
| Kondo, T., Gullan, P. J., & Williams, D. J. (2008). Coccidology. The study of scale insects (Hemiptera: Sternorrhyncha: Coccoidea). Revista Corpoica - Ciencia y Tecnología Agropecuaria, 9(2), 55-61. Crossref |
||||
| Macharia, I., Kimani, E., Koome, F., Kosiom, T., Heya, H., Otipa, M., & Oronje, M. (2017). First report and distribution of the Papaya Mealybug, Paracoccus marginatus, in Kenya. Journal of Agricultural and Urban Entomology, 33(1), 142-151. Crossref |
||||
| Malumphy, C. (2015). Detection and identification of scale insects families. The Food and Environment Agency (U.K.), Fera 2015-v1, pp.1-23. | ||||
| Mani, M., & Krishnamoorthy, A. (1998). Biological control studies on the mango green shield scale Chloropulvinaria polygonata (Ckll.) (Homoptera, Coccidae) in India. Entomon, 23(2), 105-110. | ||||
| Mansour, R., Grissa-Lebdi, K., Suma, P., Mazzeo, G. & Russo, A. (2017). Key scale insects (Hemiptera: Coccoidea) of high economic importance in a Mediterranean area: host-plants, bio-ecological characteristics, natural enemies and pest management strategies-a review. Plant Protection Science, 53(1), 1-14. Crossref |
||||
| Martins, D. S., Fornazier, M. J., Culik, M. P., Ventura, J. A., Ferreira, P. S. F., & Zanuncio, J. C. (2014). Scale insect (Hemiptera: Coccoidea) pests of papaya (Carica papaya) in Brazil. Annals of the Entomological Society of America, 108(1), 35-42. Crossref |
||||
| Mastoi, M. I., Azura, A. N., Muhammad, R., Idris, A. B. & Ibrahim, Y. (2011). First report of papaya mealybug Paracoccus marginatus (Hemiptera: Pseudococcidae) from Malaysia. Australian Journal of Basic and Applied Sciences, 5(7), 1247-1250. | ||||
| Miller, D., Rung, A., Parikh, G., Venable, G., Redford, A. J., Evans, G. A., & Gill, R. J. (2014). Scale Insects, Edition 2. USDA APHIS Identification Technology Program (ITP), Fort Collins, Colorado, U.S.A. Retrieved 7th December 2020 from http://idtools.org/id/scales/index.php. | ||||
| Muniappan, R., Shepard, B. M., Watson, G. W., Carner, G. R., Sartiami, D., Rauf, A. & Hammig, M. D. (2008). First report of the Papaya Mealybug, Paracoccus marginatus (Hemiptera : Pseudococcidae), in Indonesia and India. Journal of Agricultural and Urban Entomology, 25(1), 37-40. Crossref |
||||
| Olubayo, F., Kilalo, D., Obukosia, S., Shibairo, S., Kasina, M, Kasina, A. M., & Kasina, M. (2011). Homopteran Pests Complex Of Citrus (Citrus sinensis). International Journal of Sustainable Crop Production, 6(2), pp. 23-28. | ||||
| Ouvrard, D., Kondo, T., & Gullan, P. J. (2013). Scale insects: Major pests and management. Encyclopedia of Pest Management, 1-4. | ||||
| Pellizzari, G., Germain, J-F. (2010). Scales (Hemiptera, Superfamily Coccoidea). Chapter 9.3. BioRisk, 4(1), 475-510. Crossref |
||||
| R Core Team (2019). A language and environment for statistical computing. Vienna, Austria: R Foundation for Statistical Computing; 2012. Received 7th December, 2020 from https://www.R-project.org. | ||||
| Seljak, G. (2010). A checklist of scale insects of Slovenia. Entomologia Hellenica, 19(2), 99-113. Crossref |
||||
| Sirisena, U. G. A. I., Watson, G. W., Hemachandra, K. S., & Wijayagunasekara, H. N. P. (2013). A modified technique for the preparation of specimens of Sternorryncha for taxonomic studies. Tropical Agricultural Research, 24(2),139-149. | ||||
| Taibi, A., Gacemi, A., Medjdoub, Y., Medjdoub, I., & Doumandji, S. (2016). Citrus infestation by the black scale, Parlatoria ziziphi Lucas (Homoptera: Diaspididae) in Tlemcen, Algeria. Journal of Entomological Research, 40(3), 217-221. Crossref |
||||
| Tawfeek, M. E. (2012). Distributions of armoured scale insects infesting citrus trees in different localities in Egypt. Journal of Entomology, 9(6), 429-434. Crossref |
||||
| Uygun, N., & Satar, S. (2008). The current situation of citrus pests and their control methods in Turkey. IOBC-WPRS Bulletin, 38, 2-9. | ||||
| Walton, V. M., Krüger, K., Saccaggi, D. L., Millar, I. M., & Michaud, J. P. (2009). A survey of scale insects (Sternorrhyncha: Coccoidea) occurring on table grapes in South Africa. Journal of Insect Science, 9(47), 1-6. Crossref |
||||
| Watson, G. W. (In prep.) Towards identification of the scale insects (Hemiptera: Coccomorpha) of continental Africa: 2-7. Zootaxa (unpublished). | ||||
| Watson, G. W., & Ouvrard, D. (Submitted) Towards identification of the scale insects (Hemiptera: Coccomorpha) of continental Africa: 1. Identification of the families currently known. Zootaxa (unpublished). | ||||
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