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NEMATODE MANAGEMENT IN RAIN-FED SMALLHOLDER MAIZE PRODUCTION SYSTEMS UNDER CONSERVATION AGRICULTURE IN ZIMBABWE

Published online by Cambridge University Press:  25 April 2017

SANDRA M. MADAMOMBE ,
ISAIAH NYAGUMBO ,
BRIGHTON M. MVUMI ,
PHILLIP NYAMUGAFATA ,
MENAS WUTA  and
CLEOPAS C. CHINHEYA
SANDRA M. MADAMOMBE*
Affiliation:
CIMMYT Southern Africa Regional Office, P.O. Box MP 163 Mt Pleasant, Harare, Zimbabwe Department of Soil Science and Agricultural Engineering, Faculty of Agriculture, University of Zimbabwe, P.O. Box MP167 Mt Pleasant Harare, Zimbabwe
ISAIAH NYAGUMBO
Affiliation:
CIMMYT Southern Africa Regional Office, P.O. Box MP 163 Mt Pleasant, Harare, Zimbabwe
BRIGHTON M. MVUMI
Affiliation:
Department of Soil Science and Agricultural Engineering, Faculty of Agriculture, University of Zimbabwe, P.O. Box MP167 Mt Pleasant Harare, Zimbabwe
PHILLIP NYAMUGAFATA
Affiliation:
Department of Soil Science and Agricultural Engineering, Faculty of Agriculture, University of Zimbabwe, P.O. Box MP167 Mt Pleasant Harare, Zimbabwe
MENAS WUTA
Affiliation:
Department of Soil Science and Agricultural Engineering, Faculty of Agriculture, University of Zimbabwe, P.O. Box MP167 Mt Pleasant Harare, Zimbabwe
CLEOPAS C. CHINHEYA
Affiliation:
Nematology Department, Kutsaga Research Station, Airport Ring Road, P.O. Box 1909, Harare, Zimbabwe
*
Corresponding author. Email: maka.madamombe@gmail.com
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Summary

Nematode infestation in Sub-Saharan Africa's (SSA) cropping systems, worsened by poor crop rotations, is a major factor contributing to limited utilisation of applied nutrients and water, leading to low maize (Zea mays L.) yields particularly on sandy soils. The effects of nematode infestation on maize productivity were evaluated under conservation agriculture (CA) on granitic sandy soils in sub-humid smallholder farms of Goromonzi district of Zimbabwe. Four treatments were tested for three seasons on six smallholder farmers’ fields in a randomised complete block design, each farm being a replicate: fenamiphos 40EC (a commercial synthetic nematicide), lime + fenamiphos 40EC, lime and an untreated control. Results of the study showed that independent application of fenamiphos 40EC and lime significantly reduced plant parasitic nematode infestations in maize roots by more than 10 times those present in the untreated plots while maize yield also increased significantly. Yield increase from fenamiphos and lime applications amounted to 53 and 42% respectively, compared to the untreated controls. Maize yield was negatively correlated with density of Pratylenchus spp. nematodes. Nematode management strategies involving fenamiphos 40EC or lime could significantly reduce maize yield losses in maize-based smallholder farming systems of SSA under CA. It was more economical to use fenamiphos than lime to control nematodes.

Type
Research Article
Information
Experimental Agriculture , Volume 54 , Issue 3 , June 2018 , pp. 452 - 466
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Copyright
Copyright © Cambridge University Press 2017 

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