Plant Parasitic Nematodes Infesting Three Minor Legumes (Velvet Bean, Lablab Bean, and Jack Bean)
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Date
2022-01-19
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Balai Besar Penelitian dan Pengembangan Bioteknologi dan Sumber Daya Genetik Pertanian
Abstract
Abstract. Once introduced into rhizosphere, plant parasitic nematodes are difficult to control because they are persistent in soil by surviving on alternative hosts. Several minor legume species are suppressive to plant parasitic nematode population. This study was aimed at observing the plant parasitic nematode fauna infesting three minor legumes, velvet bean (Mucuna pruriens), lablab bean (Lablab purpureus), and jack bean (Canavalia ensiformis) in a field experiment. Soil samples were collected from plots of selected accessions planted in rainfed field at Cikeumeuh Experiment Station, Bogor on six sampling dates from August 2019 until March 2020. Microscopic analysis of extracted soil found two ectoparasitic and three endopatasitic nematodes infesting the legume rhizosphere. From the highest to the least abundant number, these were Criconemella, Helicotylenchus, Rotylenchulus, Pratylenchus, and Meloidogyne. At the beginning of
the planting season the number of nematode ranged from 0 to 57 per 200 ml soil which then fluctuated during the crop growing season. Slight differences in nematode population densities among accessions within a legume species were observed. Jack bean supported the least number of nematode, followed by lablab bean and velvet bean. Further studies under controlled environment are necessary to assess nematode multiplication on potential legume accessions with reducing effect on nematode population.
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Keywords
Parasitic, Velvet Bean, Jack Bean