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Research Detail

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Md. Khairul Alam Bhuiyan
SSO
Agronomy Division, BRRI, Gazipur

The study was conducted at BRRI, Gazipur with the objective to  observe its (Weeder 25 EC) weed control efficiency, impact on plant growth and yield of BRRI dhan28. Bio efficacy data of Weeder 25 EC @ 2 L ha-1 against weed suppression indicated that 87% control of Scirpus maritimus, 80% control of Cyperus iria, 83% control of Echinochloa crusgalli, and 80% control of Monochoria vaginalis were achieved. Herbicide treatment significantly influenced on tiller production, panicle production, grain per panicle and grain. The highest plant height was observed from in weed free plots which was statistically similar with other treatment.The highest tiller number per m2 (378.33) was observed from in weed free plots which was statistically similar with Weeder 25 EC @ 1.5 L ha-1 and Rifit 500 EC @ 1.0 L ha-1 treated plot. The lowest tiller m2 (267.66) was observed from un weeded plots. In case of Panicle per m2 similar trend of result was observed. Number of filled grain panicle-1 was statistically higher in weed free (90) treatment and the lowest grain panicle-1 (62.13) was observed in un weeded plots. Considering grain yield, weed free plot gave the highest yield (5.71t/ha) which statistically similar with other herbicide doses treated plot. The lowest grain panicle-1 was observed from in un weeded plot (3.40 t/ha-1).

  Weeder 25 EC (Oxadiazon), Weed, Rice, Herbicide.
  BRRI Farm, Gazipur.
  01-07-2004
  30-06-2005
  Crop-Soil-Water Management
  Herbicide

To observe its (Weeder 25 EC) weed control efficiency, impact on plant growth and yield of BRRI dhan28.

The study was conducted at BRRI, Gazipur. The treatment were i) Weeder 25 EC @ 1.5 L ha-1 ii) Weeder 25 EC @ 2.0 L ha-1 iii) Weeder 25 EC @ 2.5 L ha-1 iv) Rifit 500 EC @ 1.0 L ha-1 v) weed free and vi) control. Rifit @ 1.0 L ha-1 was used to compare the new herbicide. The experiment was laid out in RCB design with 3 replications. Forty days old seedlings of BRRI dhan28 were transplanted on 25th January, 2005 at 20 x 20 cm spacing with 2 seedling hill-1. Fertilizer was applied following BRRI recommended dose. Herbicides were sprayed at 5 days after transplanting. In weed free treatment, the plots were kept weed free up to 50 DAT. Weed control efficiency was calculated using weed dry matter weight data. Other operations were done as when necessary.

  BRRI. Proceedings of the BRRI Annual Internal Review for 2004-2005. Bangladesh Rice Research Institute (BRRI). Gazipur -1701.
  
Funding Source:
1.  Government Budget:  
  

From the study it was found that Weeder 500 EC @ 2.0 L ha-1 controlled weed effectively and produced optimum grain yield in Boro season. Little plant injury(yellowish) was observed after herbicide applies, being time it had been recovered. It created no problem.

  Report/Proceedings
  

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