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Screening preemergence herbicides for weed control in cassava
| Content Provider | Scilit |
|---|---|
| Author | Ekeleme, Friday Dixon, Alfred Atser, Godwin Hauser, Stefan Chikoye, David Olorunmaiye, Patience M. Olojede, Adeyemi Korie, Sam Weller, Stephen |
| Copyright Year | 2020 |
| Abstract | Weed competition severely constrains cassava root yield in sub-Saharan Africa; thus, good weed control measures, including the use of herbicides, are increasingly important. Herbicide trials were conducted at five locations across eastern, western, and north-central Nigeria over two cropping seasons (2014 and 2015). Nineteen premixed PRE herbicides applied at different rates were evaluated for efficacy on weeds and selectivity on cassava. Manual hoe-weeding at 4, 8, and 12 wk after planting (WAP) and two S-metolachlor + atrazine treatments commonly used by cassava growers were included for comparison. Six of the 19 PRE herbicide treatments (indaziflam + isoxaflutole, indaziflam + metribuzin, flumioxazin + pyroxasulfone, isoxaflutole, acetochlor + atrazine + terbuthylazine, and terbuthylazine + S-metolachlor) consistently provided 80% to 98% broadleaf and grass weed control up to 8 wk after treatment. Overall, PRE herbicide treatments and cassava yield were significantly positively correlated. Herbicide treatments terbuthylazine + S-metolachlor, flumioxazin + pyroxasulfone, diflufenican + flufenacet + flurtamone (respectively, 60 + 60 + 60, 120 + 120 + 120, 90 + 360 + 120, and 135 + 360 + 180 g $ha^{−1}$), acetochlor + atrazine + terbuthylazine (875 + 875 + 875 g $ha^{−1}$), S-metolachlor + atrazine (870 + 1,110 g $ha^{−1}$), oxyfluorfen (240 g $ha^{−1}$), indaziflam + isoxaflutole (75 + 225 g $ha^{−1}$), indaziflam + metribuzin (75 + 960 g $ha^{−1}$), and aclonifen + isoxaflutole (500 + 75 g $ha^{−1}$) contributed to yields exceeding twice the Nigerian national average of 8.76 tonnes $ha^{−1}$. These treatments had root yields of 1.4 to 2 times higher than plots that had been hoe-weeded three times. There were some adverse herbicide treatment effects such as delayed cassava sprouting and temporary leaf bleaching observed in indaziflam and diflufenican + flufenacet + flurtamone treatments, whereas sulfentrazone caused prolonged leaf crinkling. The PRE applications alone at rates safe for cassava did not provide adequate season-long weed control; supplemental POST weed control is needed about 10 WAP for satisfactory season-long control. |
| Related Links | https://www.cambridge.org/core/services/aop-cambridge-core/content/view/61256B07BF3A75F75107997D8915A34F/S0890037X20000263a.pdf/div-class-title-screening-preemergence-herbicides-for-weed-control-in-cassava-div.pdf |
| Ending Page | 747 |
| Page Count | 13 |
| Starting Page | 735 |
| ISSN | 0890037X |
| e-ISSN | 15502740 |
| DOI | 10.1017/wet.2020.26 |
| Journal | Weed Technology |
| Issue Number | 5 |
| Volume Number | 34 |
| Language | English |
| Publisher | Cambridge University Press (CUP) |
| Publisher Date | 2020-02-17 |
| Access Restriction | Open |
| Subject Keyword | Weed Technology Cassava Root Yield Cassava Manihot Esculenta Crantz |
| Content Type | Text |
| Resource Type | Article |
| Subject | Plant Science Agronomy and Crop Science |
