| Autor: |
Chipomho J; University of Zimbabwe, Marondera College of Agricultural Sciences and Technology, P.O. Box 35, Marondera, Zimbabwe., Mupeti S; University of Zimbabwe, Marondera College of Agricultural Sciences and Technology, P.O. Box 35, Marondera, Zimbabwe., Chipomho C; Kushinga Phikelela College of Agriculture, P. Bag 3705, Marondera, Zimbabwe., Mashavakure N; Chinhoyi University of Technology, P. Bag 7724, Chinhoyi, Zimbabwe., Mashingaidze AB; Chinhoyi University of Technology, P. Bag 7724, Chinhoyi, Zimbabwe. |
| Jazyk: |
angličtina |
| Zdroj: |
Heliyon [Heliyon] 2019 May 15; Vol. 5 (5), pp. e01712. Date of Electronic Publication: 2019 May 15 (Print Publication: 2019). |
| DOI: |
10.1016/j.heliyon.2019.e01712 |
| Abstrakt: |
Weed infestation is one of the major causes of low maize grain yield in sub-Saharan Africa (SSA). The perennial grass weed, Cynodon dactylon (L.) Pers., is one of the most problematic weeds in maize in SSA. A pre-formulated post-emergence herbicide mixture (50 g a.i. topramezone litre -1 + 160 g a.i. dicamba litre -1 ), sold under the trade name Stellar-Star ® , was evaluated for C. dactylon and general weed control in the 2013/14 and 2014/15 season. The experiment was laid out as a randomized complete block design (RCBD) with six treatments replicated thrice, namely; weedy control, hoe weeding at 3 and 6 weeks after crop emergence (WACE), a label recommended dose of Stellar-Star at 3 WACE, a reduced Stellar-Star dose (75% of label dose) at 3 WACE, a double dose of Stellar-Star split applied at 3 and 6 WACE and a tank mix of label doses of Stellar-Star + Atrazine applied at 3 WACE. The Stellar-Star herbicide treatments did not significantly (P > 0.05) affect C. dactylon density at 5 WACE but significantly reduced (P < 0.001) its density at 10 WACE. The Stellar-Star herbicide treatments significantly reduced (P < 0.001) weed biomass compared to the weedy-check at 5 and 10 WACE in both seasons. The Stellar-Star double dose split application and the Stellar-Star Atrazine tank mix were most effective in controlling C.dactylon (90-97% control) followed by the Stellar-Star label dose and Stellar-Star reduced dose (75%-88% control), however, the results of this study suggest that the Stellar-Star Atrazine tank mix provided the most effective early season and overall weed control and resulted in the highest yield, rainfall use efficiency (RUE) and gross margin and is recommended. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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