Weed Management in Broadcast-Seeded Hybrid Rice (Oryza sativa L.) | ||||
| Journal of Plant Production | ||||
| Article 9, Volume 8, Issue 10, October 2017, Page 1021-1028 PDF (375.22 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2017.41079 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| S. S. M. Abd El-Naby; I. H. Abou El-Darag; A. M. A. El-Ghandor | ||||
| Rice Dept., Field Crop Research Institute, ARC, Giza, Egypt. | ||||
| Abstract | ||||
| Two field experiments were carried out at the experimental farm of Sakha Research Station, Kafrelsheikh, Egypt during 2016 and 2017 summer seasons to select the best weed control treatments for two Egyptian hybrid rice varieties under broadcasting method. Two rice hybrids {Hybrid-1 (Sk2034H) and Hybrid-2 (Sk2151H)}. Six chemical weed control treatments included; Penoxsulam 2.5% at two rates (0.018 and 0.024 kg ai ha-1) + Azimsulfuron 50% at rate of 0.014 kg ai ha-1, Bispyribac-sodium 2% at two rates (0.029 and 0.038 kg ai ha-1) + Azimsulfuron 50% at rate of 0.014 kg ai ha-1, and Fenoxaprop-ethyl 7.5% at two rates (0.045 and 0.063 kg ai ha-1) + Azimsulfuron 50% at rate of 0.014 kg ai ha-1, were applied as compared to weedy check plots (control). A split plot design with four replications was used where, rice hybrids were allocated in the main plots while weed control treatments were applied in sub-plots. The results showed that, H1 rice variety (Sk2034H) recorded the lowest dry weight of grassy weeds, C. difformis and total weeds, and scored the highest rice dry weight, number of panicles per square meter, filled grains per panicle and rice grain yield, while H2 was the best in 1000-grain weight and panicle weight during the two seasons. Bispyribac-sodium 2% at recommended dose (0.038 kg ai ha-1) or Fenoxaprop-ethyl 7.5% at reduced rate mixed with Azimsulfuron 50% at rate of 0.014 kg ai ha-1 gave the lowest weed biomass and the best rice growth values in addition to yield and yield components in 2016 and 2017 seasons. The obtained results revealed that the best weed control, rice dry matter, yield and yield components were achieved by applying Bispyribac-sodium 2% at recommended dose (0.038 kg ai ha-1) or Fenoxaprop-ethyl 7.5% at reduced rate mixed with Azimsulfuron 50% at recommended dose (0.014 kg ai ha-1) with cultivation of Egyptian hybrid-1 (Sk2034H) except for panicle weight and 1000-grain weight of rice which obtained by H2 rice hybrid treated with the same mixtures of herbicides during the two seasons of study. | ||||
| Keywords | ||||
| rice; direct-seeded; rice hybrids; yield; dry eight weeds; herbicide; and weed control | ||||
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