Response of weeds and soil microorganisms to imazaquin and pendimethalin in cowpea and soybean
Herbicides applied to combat weeds and increase crop yields may also have undesired effects on beneficial soil microorganisms. Field studies were conducted in 2005 and 2006 in Zaria, Nigeria, to evaluate the response of weeds and soil microorganisms to imazaquin applied at 0.05, 0.10, 0.20 and 0.40...
| Main Authors: | , , |
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| Format: | Journal Article |
| Language: | Inglés |
| Published: |
Elsevier
2014
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/76028 |
| _version_ | 1855526017558380544 |
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| author | Chikoye, David Abaidoo, Robert C. Fontem, Lum. A. |
| author_browse | Abaidoo, Robert C. Chikoye, David Fontem, Lum. A. |
| author_facet | Chikoye, David Abaidoo, Robert C. Fontem, Lum. A. |
| author_sort | Chikoye, David |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Herbicides applied to combat weeds and increase crop yields may also have undesired effects on beneficial soil microorganisms. Field studies were conducted in 2005 and 2006 in Zaria, Nigeria, to evaluate the response of weeds and soil microorganisms to imazaquin applied at 0.05, 0.10, 0.20 and 0.40 kg a.i./ha and pendimethalin applied at 1.0, 2.0, 4.0, and 8.0 kg a.i./ha in cowpea and soybean. Hoeweeded and unweeded (no herbicide) plots were controls. Both herbicides significantly reduced weed biomass in both crops, when compared to the unweeded control, which had the highest weed biomass at all sampling dates. Treatments with 0.40 kg a.i./ha of imazaquin, 2.0 and 4.0 kg a.i./ha of pendimethalin, and the hoe-weeded control, had the highest cowpea grain yield. The unweeded control had the lowest grain yield which was comparable to that in all other herbicide treatments. All treatments except 4.0 and 8.0 kg a.i./ha of pendimethalin had higher soybean grain yield than the unweeded control. Soybean yield was lowest in the unweeded control, and treatments that received 4.0 and 8.0 kg a.i./ha of pendimethalin. All rates of imazaquin gave similar soybean grain yields that were 29e41% higher than that from pendimethalin. The hoe-weeded control had the highest yield, which was 79% more than that in the unweeded control. Higher rates of imazaquin and pendimethalin reduced nodulation, nitrogen fixation, and vesicular arbuscular mycorrhizal (VAM) fungi colonisation in both crops. VAM fungi species diversity and species richness in cowpea rhizosphere soil and species diversity in soybean rhizosphere soil were reduced relative to the controls due to application of both herbicides with the rates of 0.10, 0.20, and 0.40 kg a.i./ha of imazaquin and 8.0 kg a.i./ha of pendimethalin being significantly effective. |
| format | Journal Article |
| id | CGSpace76028 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2014 |
| publishDateRange | 2014 |
| publishDateSort | 2014 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | CGSpace760282025-01-27T15:00:52Z Response of weeds and soil microorganisms to imazaquin and pendimethalin in cowpea and soybean Chikoye, David Abaidoo, Robert C. Fontem, Lum. A. weed control vesicular arbuscular mycorrhizae cowpeas soybeans Herbicides applied to combat weeds and increase crop yields may also have undesired effects on beneficial soil microorganisms. Field studies were conducted in 2005 and 2006 in Zaria, Nigeria, to evaluate the response of weeds and soil microorganisms to imazaquin applied at 0.05, 0.10, 0.20 and 0.40 kg a.i./ha and pendimethalin applied at 1.0, 2.0, 4.0, and 8.0 kg a.i./ha in cowpea and soybean. Hoeweeded and unweeded (no herbicide) plots were controls. Both herbicides significantly reduced weed biomass in both crops, when compared to the unweeded control, which had the highest weed biomass at all sampling dates. Treatments with 0.40 kg a.i./ha of imazaquin, 2.0 and 4.0 kg a.i./ha of pendimethalin, and the hoe-weeded control, had the highest cowpea grain yield. The unweeded control had the lowest grain yield which was comparable to that in all other herbicide treatments. All treatments except 4.0 and 8.0 kg a.i./ha of pendimethalin had higher soybean grain yield than the unweeded control. Soybean yield was lowest in the unweeded control, and treatments that received 4.0 and 8.0 kg a.i./ha of pendimethalin. All rates of imazaquin gave similar soybean grain yields that were 29e41% higher than that from pendimethalin. The hoe-weeded control had the highest yield, which was 79% more than that in the unweeded control. Higher rates of imazaquin and pendimethalin reduced nodulation, nitrogen fixation, and vesicular arbuscular mycorrhizal (VAM) fungi colonisation in both crops. VAM fungi species diversity and species richness in cowpea rhizosphere soil and species diversity in soybean rhizosphere soil were reduced relative to the controls due to application of both herbicides with the rates of 0.10, 0.20, and 0.40 kg a.i./ha of imazaquin and 8.0 kg a.i./ha of pendimethalin being significantly effective. 2014-11 2016-07-11T08:41:25Z 2016-07-11T08:41:25Z Journal Article https://hdl.handle.net/10568/76028 en Limited Access Elsevier Chikoye, D., Abaidoo, R. & Fontem, Lum. A. (2014). Response of weeds and soil microorganisms to imazaquin and pendimethalin in cowpea and soybean. Crop Protection, 65, 168-172. |
| spellingShingle | weed control vesicular arbuscular mycorrhizae cowpeas soybeans Chikoye, David Abaidoo, Robert C. Fontem, Lum. A. Response of weeds and soil microorganisms to imazaquin and pendimethalin in cowpea and soybean |
| title | Response of weeds and soil microorganisms to imazaquin and pendimethalin in cowpea and soybean |
| title_full | Response of weeds and soil microorganisms to imazaquin and pendimethalin in cowpea and soybean |
| title_fullStr | Response of weeds and soil microorganisms to imazaquin and pendimethalin in cowpea and soybean |
| title_full_unstemmed | Response of weeds and soil microorganisms to imazaquin and pendimethalin in cowpea and soybean |
| title_short | Response of weeds and soil microorganisms to imazaquin and pendimethalin in cowpea and soybean |
| title_sort | response of weeds and soil microorganisms to imazaquin and pendimethalin in cowpea and soybean |
| topic | weed control vesicular arbuscular mycorrhizae cowpeas soybeans |
| url | https://hdl.handle.net/10568/76028 |
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