Management of Meloidogyne incognita in yam-based cropping systems with cover crops |
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| Institution: | 1. Department of Crop Protection and Environmental Biology, University of Ibadan, Ibadan, Nigeria;2. International Institute of Tropical Agriculture (IITA), PMB 5320 Oyo Road, Ibadan, Nigeria;1. State University of Maringa, Dept. of Agrarian Science, Umuarama, PR, Brazil;2. State University of Maringa, Postgraduated in Agricultural Science, Umuarama, PR, Brazil;3. State University of Maringa Dept. of Chemical Engineering, Maringá, PR, Brazil;1. Central Departments of Zoology, Tribhuvan University, Kirtipur, Kathmandu, Nepal;2. Himalayan Biodiversity Network – Nepal, Bharatpur 11, Chitwan, Nepal;3. Austin Peay State University, Clarksville, TN, 37044, USA;1. Department of Crop Protection, Faculty of Agriculture, University of Ilorin, Nigeria;2. Department of Industrial Chemistry, Faculty of Physical Sciences, University of Ilorin, Nigeria;3. Department of Crop Protection and Environmental Biology, University of Ibadan, Nigeria;4. Department of Chemical Sciences, University of Johannesburg, South Africa;1. State Key Lab of Mycology, Institute of Microbiology, Chinese Academy of Sciences, No 3 Park 1, Beichen West Rd., Chaoyang District, Beijing 100101, China;2. Department of Botany, Faculty of Science, Fayoum University, Fayoum 63514, Egypt;3. University of Chinese Academy of Sciences, Beijing 100039, China;4. Department of Plant Pathology, University College of Agriculture, University of Sargodha, Sargodha 40100, Pakistan;5. Department of Genetics, Faculty of Agriculture, Fayoum University, Fayoum 63514, Egypt;1. Department of Crop Protection and Environmental Biology, University of Ibadan, Nigeria;2. International Institute of Tropical Agriculture (IITA), PMB 5320, Ibadan, Nigeria;3. IITA, Kano Station, Nigeria;4. National Institute of Agricultural Research, Gros Bouquet, PMB 16 169, Libreville, Gabon |
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| Abstract: | The effect of intercropping cover crops was with yam was assessed for nematode management both in pot and field conditions in Nigeria. The cover crops were sown with yams in pots containing sterile soil and inoculated with 5000 eggs of Meloidogyne incognita. In the field, each cover crop was separately intercropped with yams inoculated with 10,000 nematodes. From both pot and field experiments, no nematode damage was observed on yam tubers that were intercropped with Aeschynomene histrix, Crotolaria juncea, and Tagetes erecta. Damage in intercropped tubers was reduced by 72.7% with Mucuna pruriens, Centrosema pubescens, and Pueraria phaseoloides and by 58.3% with Stylosanthes guianensis compared to yams planted without cover crops; they also had lower (p ≤ 0.05) nematode populations. Cajanus cajan, Lablab purpureus and Vigna unguiculata however, supported high nematode populations and led to nematode damage in intercropped yams. Tubers from M. incognita-inoculated plants were more damaged and lost 42% more weight (p ≤ 0.05) following three months of storage than tubers from uninoculated plants. Intercropping yams with selected cover crops can be useful in managing M. incognita without reducing yam yields. |
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| Keywords: | Intercropping Nematode management |
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