Composition and diversity of weedy rice species in lowland irrigated rice field of Argao, Cebu, Philippines




Abstract. Lillo EP, Chavez MLM, Malaki AB, Alcazar SMT, Baoy RR, Margate MA, Abrigana M. 2022. Composition and diversity of weedy rice species in lowland irrigated rice field of Argao, Cebu, Philippines. Biodiversitas 23: 6275-6283. Weeds serve as a severe challenge for rice growers, causing annual crop losses worldwide. The study aims to provide baseline information on the composition and diversity of weedy rice species in lowland irrigated rice fields of Argao, Cebu, Philippines, as a basis for farmers' weed management practices. Field surveys were done using the quadrate method. A quadrate measuring 1m x 1m was randomly placed in weed-infested rice plantation areas. Weedy rice species inside the quadrate were identified. The diversity of species was computed using Shannon diversity index. A total of 53 species were recorded and classified into 21 families and 40 genera. Dominant weedy rice species during the vegetative stage was Sphenoclea zeylanica Gaertn., and Fimbristylis quinquangularis (Vahl) Kunth. for both the reproductive and harvesting stage. The site has a computed diversity value of H'=3.36 with a relative value of high species diversity, indicating less input in terms of weed management practices. The cluster analysis reveals that the lowland rice fields of Argao were covered by seven weedy rice communities. This situation could create a negative impact on rice production output. The similarity in species composition among sampling sites signifies uniformity in the application of specific weed management practices.


Bhurer K, Yadav D, Ladha J, Thapa R, & Pandey K. 2014. Influence of Integrated Weed Management Practices on Dynamics and Weed Control Efficiency in Dry Direct Seeded Rice. Nepal Journal of Science and Technology, 14(2), 33–42.
Chauhan BS. 2013. Strategies to manage weedy rice in Asia. Crop Protection. Volume 48, June 2013, Pages 51-56.
Chauhan SB, Awan HT, Abugho BS, Evangelista G, Yadav S. 2015. Effect of crop establishment methods and weed control treatments on weed management, and rice yield. Field Crops Res 172: 72–84. 0378-4290/© 2014 Elsevier B.V.
[DENR-DAO] Department of Environment and Natural Resources–Department Administrative Order. 2017. Updates National List of Threatened Philippine Plants and their Categories. 30p
Deytieux V, Nemceck T, Knuchel RF, Gaillard G. 2012. Is integrated weed management efficient for reducing environmental impacts of cropping systems? A case study based on life cycle assessment. Europ J Agron 36:55–65. doi:10.1016/j.eja.2011.08.004
Dhaliwal SS, Sharma S, Shukla AK, Sharma V, Bhullar MS, Dhaliwal TK, Alorabi M, Alotaibi SS, Gaber A, Hossain A. 2021. Removal of Biomass and Nutrients by Weeds and Direct-Seeded Rice under Conservation Agriculture in Light-Textured Soils of North-Western India. Plants 2021, 10, 2431. Doi: 10.3390/plants10112431. PMID: 34834794.PMCID: PMC8618767
Donayre DKM, Martin EC, Santiago SE, and Lee JT. 2018. Weeds in Irrigated and Rainfed Lowland Ricefields in the Philippines. 2nd Edition. Philippine Rice Research Institute, Maligaya, Science City of Muñoz, Nueva Ecija, Philippines. 197 p.
FAO. 2020. World Food and Agriculture - Statistical Yearbook 2020. Rome.
Farooq M, Flower KC, Jabran K, Wahid A, Kadambot HM, Siddique HM. 2011. Crop yield and weed management in rainfed conservation agriculture. Soil Til. Res., 117, Pp. 172-183. DOI: 10.1016/j.still.2011.10.001
Focht T, & Pillar VD. 2003. Spatial patterns and relations with the site factors in a campos grassland under grazing. Brazilian Journal of Biology, 6(3), 423- 436.
Gonzales AT. 2017. Survey and Identification of Common Weeds Associated with Rice and Vegetable Production in Rosario, La Union, Philippines. Universal Journal of Plant Science, 5(3), 37-40. ujps.2017.050301
Hakim MA, Juraimi AS, Ismail SR, Hanafi MM, & Selamat A. 2010. Distribution of Weed Population in the Costal Rice Growing Area of Kedah in Peninsular Malaysia. Journal of Agronomy, 9: 9-16. DOI: 10.3923/ja.2010.9.16. URL:
Hemalatha K, Singh Y, Kumar S. 2020. Leaf colour chart-based nitrogen and weed management impacts on weeds, yield and nutrient uptake in dry direct-seeded rice. Indian Journal of Weed Science 52(4): 318–321. DOI: 10.5958/0974-8164.2020.00063.5
IUCN.2022. The IUCN Red List of Threatened Species. Version 2022-1.
Kolb LN, Gallandt ER.2012. Weed management in organic cereals: advances and opportunities. Org Agric 2:23–42. Doi: 10.1007/.
Lillo EP, Malaki ABB, Alcazar SMT, Nuevo RU, and Rosales R. 2019. Native Trees on Mt. Lantoy Key BiodiversityAreas (KBA), Argao, Cebu, Philippines. Philippine J Sci 148 (2): 359-371.
Lillo EP, Fernando ES, Lillo MJR. 2019. Plant diversity and structure of forest habitat types on Dinagat Island, Philippines. Journal of Asia-Pacific Biodiversity. Volume 12, Issue 1, 1 March 2019, Pages 83-105.
Luo Y, Fu H, and Traore S. 2014. Biodiversity Conservation in Rice Paddies in China:Toward Ecological Sustainability. Sustainability. 6: 6107-6124; doi: 10.3390/su6096107
Melander B, Munier-Jolan N, Charles R, Wirth J, Schwarz J, Weide R, Bonin L, Jensen PK, Kudsk P. 2013. European perspectives on the adoption of nonchemical weed management in reduced-tillage systems for arable crops. Weed Technology 27 (1):231–240. DOI:10.1614/WT-D-12-00066.1. Corpus ID: 86470999
Mesquita MLR, De Andrade LA, and Pereira W E. 2013. Floristic diversity of the soil weed seed bank in rice-growing area of Brazil: in situ and ex situ evaluation. Acta Botanica Brasilica, 27(3), 465-471. http://dx.doi. org/10.1590/S0102-33062013000300001
Mukherjee D, Karmakar R. 2015. Integrated weed management in transplanted rice (Oryza sativa L.). International Journal of Bioresources Science. 2(2): 139. DOI: 10.5958/2454-9541.2015.00008.0
Olorunmaiye PM, Egberongbe KR, Adeoye PO, Alamu OO, & Taiwo ST. 2011. Weed species composition of citrus–based cropping systems at National Horticultural Research Institute Ibadan, Nigeria. Agriculture and Biology Journal of North America, 2(3), 522-528. abjna.2011.2.3.529.537
Oerke EC. 2006. Crop losses to pests. The Journal of Agricultural Science. 144 (1): pp. 31-43. DOI:
Pan J, Zhang LG, Wang L, Fu S. 2020. Effects of long-term fertilization treatments on the weed seed bank in a wheat-soybean rotation system. Global Ecology and Conservation 21 (2020) e00870.
Rabbani N, Bajwa R, & Javaid A. 2011. Interference of five problematic weed species with rice growth and yield. African Journal of Biotechnology, 10, 1854– 1862
Rao AN, Wani SP, Ramesha M, and Ladha JK. 2015. Weeds and Weed Management of Rice in Karnataka State, India. Weed Technology. 29 (1): pp. 1-17. Weed Technology, vol. 29, no. 1, 2015, pp. 1–17. JSTOR,
Santra SC, Mallick A, & Samal AC. 2014. Global warming impact on crop productivity. In R. S. Sengar & K. Sengar (Eds.), Climate Change Effect on Crop Productivity (1st ed., pp. 357-384). CRC Press. https://doi. org/10.1201/b17684-16
Shibayama H. 2008. Weeds and weed management in rice production in Japan. Weed Biology and Management. 1(1): pp. 53-60. Wiley Online Library.
Tang LL, Wan K, Cheng CP, Li Rh, Wang DZ, Pan JF, Tao Y, Xie J, Chen F. 2013. Effect of fertilization patterns on the assemblage of weed communities in an upland winter wheat field. J. Plant Ecol. 7 (1): 39-50. DOI: 10.1093/jpe/rtt018
Tang LL, Cheng CP, Wan K, Li Rh, Wang DZ, Tao Y, Pan JF, Xie J, Chen F. 2014. Impact of fertilizing pattern on the biodiversity of a weed community and wheat growth. PLoS One 9 (1): e84370.
Tshewang S, Sindel BM, Ghimiray M, Chauhan BS. 2016. Weed Management Challenges in (Oryza sativa L.) For food Security in Bhutan. 0261-2194/
Turner RJ, Davies G, Moore H, Grundy AC, Mead A. 2007. Organic weed management; a review of the current UK farmer perspective. Crop Protection. 26 (3):377–382.
Wan K, Tao Y, Li Rh, Pan JF, Tang LL, Chen F. 2012. Influences of long-term different types of fertilization on weed community biodiversity in rice paddy fields. Weed Biology and Management. 12 (1): 12-21.
Yun-he H, Ping-lei G, Sheng Q. 2019. An investigation of weed seed banks reveals similar potential weed community diversity among three different farmland types in Anhui Province, China. Journal of Integrative Agriculture 2019, 18(4): 927–937. doi: 10.1016/S2095-3119(18)62073-8. Available online at
Zimdahl RL. Ed. 2013. Fundamentals of Weed Science. 4th ed. Academic Press. EBook ISBN: 9780123978189; Hardcover ISBN: 9780123944269
Zahan T, Hossain MF, Chowdhury AK, Ali MO, Ali MA, Dessoky ES, Hassan MM, Maitra S, Hossain A. 2021. Herbicide in Weed Management of Wheat (Triticum aestivum L.) and Rainy Season Rice (Oryza sativa L.) under Conservation Agricultural System. Agronomy 2021, 11, 1704.

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