Plant parasitic nematodes associated with banana (Musa spp. var. ‘Nendran’ AAB) – a diversity analysis at banana fields in Ottappalam Taluk of Kerala, India
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Abstract
Plant parasitic nematodes were documented as one of the major constraints in world food production. Efforts to understand the relations of the hosts and parasites will help to develop viable management strategies. In this aspect, a research survey was conducted during the post-monsoon season of 2017 in Ottappalam Taluk of Kerala, India to investigate the occurrence and population abundance of plant parasitic nematodes associated with an important crop banana (Musa var. ‘Nendran’ AAB). An extensive and in-deep survey for banana nematodes for this agricultural region of Kerala is not yet done. A total of 21 rhizosphere soil samples and root samples each were collected and processed for this study. Analysis for the plant parasitic nematode community showed variable degree of occurrence of viz. Aphelenchus spp., Dorylaimoides spp., Helicotylenchus spp., Hoplolaimus spp., Meloidogyne spp., Pratylenchus spp., Radopholus spp., Rotylenchulus spp., Rotylenchus spp., and Tylenchus spp. in both soil and root samples. Random surveys and their data analysis were done with absolute frequency distribution (%), absolute density (%), prominence value, and ANOVA (P = 0.05). The values for absolute frequency distribution (%), absolute density (%), and prominence value of the genus Meloidogyne spp. were 85.71%, 1,128.57%, and 10,448.54 respectively for rhizosphere soil samples and were 71.43%, 985.71%, and 8,330.85 respectively for root samples in banana fields of Ottappalam Taluk, revealed the more widespread occurrence of this genus in banana fields of Ottappalam Taluk. At the same time, maximum diverse numbers of nematodes were reported from Sreekrishnapuram panchayath and Kadambazhipuram panchayath for soil and root samples respectively. These findings were very much informative for the data addition about nematode fauna diversity studies of the agriculture sector, especially for the crop banana.
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