A study on the pests and weeds and pests in the pokkali wetlands and adjoining areas of Ernakulam district, Kerala
Keywords:
pokkali wetlands, vembanad ramsar site, pests, weedsAbstract
Pokkali is a peculiar saline tolerant rice variety with Geographical Indication (GI). It is cultivating organically in the coastal regions of Ernakulam, Alappuzha and Thrissur districts of Kerala, India. This rice variety worth 3000 years is famous for its taste, protein content and medicinal properties. The Pokkali fields are unique, tidal wetlands which are highly nutritive and biodegradable, providing umpteen services. Ernakulam District has the largest area of Pokkali cultivation which are part of Vembanad Ramsar site. The rotational cultivation of paddy-prawn is a sustainable agriculture approach practiced in these fields. An intense study was carried out in the five selected Pokkali wetlands and adjoining areas of Ernakulam District, Kerala from 01st January 2016 to 31st December 2021 to identify the pests and weeds. Direct observation, point count and Quadrats methods were utilized for the study. Reference books and help of experts were utilized for specimen identification. The occurrence, abundance and diversity of the pests and weeds were recorded. Data analysis was done using statistical softwares (PAST, SPSS and R). During the study, a total of nine pests and 56 weeds were identified from the study area. Weeds serve as host for harmful pests and diseases. It affects the health of the ecosystem. The study of weeds and pests are important to analyze the successes and failures of crops cultivating in the study area. It is beneficial for the producers. Such studies are essential for implementing appropriate control measures.
References
Aiswarya AJ, Viji V, Thara KS. Biodiversity studies in the wetland ecosystems of Anachal, North Paravoor, Kerala. Proceedings of first Kerala Women’s Science Congress, 2010.
Altman J. Observational study of behaviour: sampling methods. Behaviour, 1974; 49:227-267.
Asaithambi M, Manikarasagam S. Odonata of Annamalai University, Annamalai Nagar, Tamil Nadu, India, Zoos' Print Journal, 2002; 17(2):704-706.
Ashamol ATV. Effect of Pokkali cultivation and Shrimp farming on the soil characteristics of two different Pokkali fields at Chellanam and Kadamakudy, Kochi, Kerala, India. International Research Journal of Environmental Sciences, 2014, 61-64.
Bindu CT, Praseeja CV, John C, Satheesh R, Unni KS. An ecological study of the macrophytes vegetation of Pallam region in Kuttanad. Proceedings of the UGC sponsored seminar on wetland conservation and management. Organised by Department of Zoology, Mar Thoma College for Women, Perumbavoor, Kerala, 2004.
Cowardin LM, Carter V, Gollet FC, La Roe ET. Classification of Wetlands and Deepwater Habitats of the United States. United States Fish and Wildlife Service, Washington, D.C., U.S., 1979, 103.
Davis A, Renner KA, Sprague C, Dyer L, Mutch D. Integrated Weed Management “One Year’s Seeding” Extension Bulletin E-2931.East Lansing, MI. Michigan State University, 2005.
Deepa KM. Seasonal Variation in avifauna with Respect to Habitat Changes in the Pokkali fields of Ernakulam District, Kerala. Ph.D. Thesis, M.G. University, Kottayam, 2014.
Fraser FC. The Fauna of British India, including Ceylon and Burma. Odonata. Vol. I, Taylor and Francis, London, 1933, 423.
Fraser FC. The Fauna of British India, including Ceylon and Burma. Odonata. Vol.III, Taylor and London, 1936, 461.
Jaikumar M, Chellaiyan D, Kanagu L, Senthil K, Stella C. Distribution and succession of aquatic macrophytes in Chilika Lake, India. Journal of Ecology and the Natural Environment, 2011; 3(16):499-508.
Krishnaswamy N, Chauhan AO, Das RK. Some common predators of rice insect pest in Assam, India. International Rice Research Newsletter, 1984; 9(2):15-16.
Kumar A, Prasad M. Odonata of Ponds, Tanks and Paddy fields at and around Dehradun Valley. (W. Himalaya). Newsletter Zoological Survey, 1977; 3(5):270-273.
Mitsch WJ, Gosselink JG Wetlands. Van Nostrand Reinhold, New York, 1993.
Nayar S, Nayar NM. Wetlands. In: Thampi KB, Nayar NM, Nayar CS. (eds.). The Natural Resources of Kerala. WWF State Office, Trivandrum, 1997.
Oudhia P. Phyto-sociological studies of rainy wasterlands weed with special reference to Parthenrium hysterophous (L.) Available at http://www.iprng.org/IPRNG, 2004.
Panigrahy S, Murthy TVR, Patel JG, Singh TS, Wetlands of India: inventory and assessment at 1:50,000 scale using geospatial techniques. Current Science, 2012; 102(6):852-856.
Seema K. Management of fragile wetland ecosystem in Salim Ali Bird Sanctuary with respect to its Aquatic Fauna. Ph.D. Thesis, Mahatma Gandhi University, Kottayam, 2002.
Shylaraj KS, Sasidharan NK. VTL 5: A high yielding salinity tolerant rice variety for the coastal saline ecosystems of Kerala. Crop Science, 1998; 38:394-398.
Suchitra M, Venugopal PN. In troubled waters. Agriculture, 2005. Available at www.questfeatures.org/articles/pokkali.html.
Sujana KA, Sivaperuman C. Preliminary studies on flora of Kole Wetlands, Thrissur, Kerala. Indian Forester, 2008; 134(8):1079-1086.
Sylas VP, Mathew JC, Sankaran Unni K, Satheesh R, Thomas AP. Invasive aquatic weeds of the canals, rivers and slow flowing ecosystems of Kuttanad in relation to paddy fields. Proceedings of the UGC sponsored seminar on wetland conservation and management. Organised by Department of Zoology, Mar Thoma College for Women, Perumbavoor, Kerala, 2010.
Tomy F. Seasonal Variation in avifauna with Respect to Habitat Changes in the Kole Wetlands of Thrissur District, Kerala. Ph.D. Thesis, Mahatma Gandhi University, Kottayam, 2016.
Wentworth TR, Conn JS, Skroch WA, Mrozek EJ. Gradient analysis and numerical classification of apple orchards' weed vegetation. Agricultural Ecosystem and Environment, 1984; 11:239-251.
Wetlands International. Waterbird Population Estimates. 5th edition. Wetlands International, Wageningen, The Netherlands, 2007.
Wiegleb G. Analysis of flora and vegetation in rivers: concepts and applications. In: Symoens JJ. (ed.). Vegetation of Inland Waters. eKluwer Academic Publishers, Dordrecht, The Netherlands, 1988, 311-341.
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