Effect of Different Herbicides in Weed Management in Transplanted Rice

Authors

  • Rajendra Kumar Bhattarai National Agronomy Research Centre, Khumaltar, Lalitpur, Nepal https://orcid.org/0000-0002-3150-8849
  • Bhimsen Chaulagain National Agronomy Research Centre, Khumaltar, Lalitpur, Nepal
  • Pankaj Gyawaly National Agronomy Research Centre, Khumaltar, Lalitpur, Nepal
  • Tika Bahadur Karki National Agronomy Research Centre, Khumaltar, Lalitpur, Nepal
  • Reshama Neupane National Agronomy Research Centre, Khumaltar, Lalitpur, Nepal
  • Soni Kumari Das National Agronomy Research Centre, Khumaltar, Lalitpur, Nepal
  • Sangita Kaduwal National Agronomy Research Centre, Khumaltar, Lalitpur, Nepal
  • Ramesh Acharya Directorate of Agricultural Research, Lumle, Kaski, Nepal
  • Prakash Paneru National Soil Science Research Centre, Khumaltar, Lalitpur, Nepal
  • Asma Thapa Himalayan College of Agricultural Sciences and Technology, Kathmandu, Nepal
  • Kripa Adhikari Himalayan College of Agricultural Sciences and Technology, Kathmandu, Nepal
  • Pradeep Shah National Agricultural Environment Research Centre, Lalitpur, Nepal

DOI:

https://doi.org/10.3126/ajn.v7i1.62166

Keywords:

Pretilachlo, management, rice, weed, yield

Abstract

Weed is one of the major yield-limiting factors in rice cultivation. It causes yield losses of around 40-90%, depending on the situation. Manual weeding is the dominant weed management method in rice and limited farmers use herbicides in Nepal. Selecting effective herbicides for different weed species is a crucial task for farmers. So, an experiment with 9 treatments consisting of 5 herbicides was conducted in RCB Design with 3 replications during 2020 and 2021 to find effective herbicides. The recommended agronomic practices were followed. Rice variety Khumal 11 was transplanted in a 4m x 3m plot with a spacing of 20 cm between rows and 15 cm between plants. Pooled data of two years showed the lowest weed density (14.2 m-2) and highest (73.2 m-2) in the treatment pretilachlor @ 0.5 kg ha-1 (pre) as sand mix and in the weedy check. Similarly, the lowest weed dry biomass (7.4 g m-2) and the highest (42.4 g-2) were recorded in the same treatments. The grain yield was the highest (7253 kg ha-1) in pretilachlor applied at 0.5 kg a.i ha-1 as pre-emergence spray and the lowest (4339 kg ha-1) in the control. The treatment pretilachlor @ 0.5 kg a.i ha-1 (pre) applied as spray was superior in managing weed and resulting in the highest grain yield, so it is recommended for mid-hill ecologies under transplanted rice.

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Published

2023-07-10

How to Cite

Bhattarai, R. K., Chaulagain, B., Gyawaly, P., Karki, T. B., Neupane, R., Das, S. K., Kaduwal, S., Acharya, R., Paneru, P., Thapa, A., Adhikari, K., & Shah, P. (2023). Effect of Different Herbicides in Weed Management in Transplanted Rice. Agronomy Journal of Nepal, 7, 121–126. https://doi.org/10.3126/ajn.v7i1.62166

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Articles