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    Seed dressing maize with imazapyr to control Striga hermonthica in farmers’ fields in the

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    Journal Article (596.0Kb)
    Date
    2020-03-17
    Author
    Kamara, A.Y.
    Menkir, A.
    Chikoye, D.
    Solomon, R.
    Tofa, A.I.
    Omoigui, L.O.
    Type
    Journal Article
    Review Status
    Peer Review
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    Use of small doses of imazapyr and pyrithiobac for seed coatings of imazapyr-resistant maize hybrids (IR-Maize) offers an effective means to control Striga hermonthica. Field trials were conducted in Bauchi and Kano States of Nigeria in 2014 and 2015 under heavy Striga infestation to evaluate the potential effectiveness of herbicide coated hybrids maize on Striga control in farmers’ field. Results showed that herbicide coated seeds reduced number of emerged Striga per m2 and Striga damage symptoms in farmers’ fields in all the locations. In Kano the number of emerged Striga was 4.9 to 7.9 times less in herbicide treated hybrids in comparison with those of the same hybrids planted without herbicide treatment. The Striga-resistant open pollinated variety (OPV) (TZL COMP1 SYN) had 6.7 to 8.0 times more Striga than the treated hybrids. In Bauchi, the number of emerged Striga on the untreated IR-maize hybrids were over four-times higher on the treated IR-maize hybrids than on the untreated hybrids. The Striga-resistant OPV check had four-times more Striga than the treated IR-maize hybrids and twice more than the untreated IR-maize hybrids across the two years. However, the effects of herbicide seed coating on grain yields were not consistent because of strong seasonal effects. The result revealed that coating of imazapyr-resistant hybrid maize seeds with imazapyr was effective in reducing Striga infestation in farmers’ fields. Although herbicide seed coating did not give consistent yield advantages of the hybrids over the untreated checks, a combination of herbicide seed treatment and genetic resistance to Striga would serve as an effective integrated approach that could significantly reduce the parasite seed bank from the soil and prevent production of new seeds. The IR-hybrids and the OPV checks contained Striga resistance/tolerant genes that protected them against drastic yield loss in the Striga infested fields in both Bauchi and Kano.
    https://dx.doi.org/10.3390/agriculture10030083
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/7591
    IITA Authors ORCID
    Alpha Kamarahttps://orcid.org/0000-0002-1844-2574
    Abebe Menkirhttps://orcid.org/0000-0002-5907-9177
    David Chikoyehttps://orcid.org/0000-0002-6047-9821
    Lucky Omoiguihttps://orcid.org/0000-0001-8473-2775
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.3390/agriculture10030083
    Research Themes
    Biotech and Plant Breeding; Plant Production and Health
    IITA Subjects
    Agronomy; Disease Control; Maize; Plant Breeding; Plant Diseases; Plant Production
    Agrovoc Terms
    Maize; Striga Hermonthica; Seeds; Striga; Nigeria
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Hubs
    Southern Africa Hub; Headquarters and Western Africa Hub
    Journals
    Agriculture
    Collections
    • Journal and Journal Articles4586
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