A study on chemical weed management in boro rice: A review

Abstract

Characteristically boro rice is winter season, photo-insensitive, transplanted rice cultivated on supplemental irrigation, often under conditions, where farmers’ are not able to take any other rabi season crop. Butachlor, pretilachlor, bispyribac-sodium and anilofos are the most commonly used herbicides for control of weeds in boro rice. Weed competition is one of the prime yield limiting biotic constraints resulting in yield reduction to the tune of 28 to 45%. Echinochloa spp., Cynodon dactylon, Portulaca quadrifida and Cyperus spp. are the major weeds responsible for yield reduction in boro rice. However, continuous and indiscriminate use of herbicides for a longer period may result in buildup of problematic weeds and also development of herbicide resistance in weeds. It is therefore, necessary to review the performance of promising herbicides for chemical weed management to improve the production and productivity of boro rice under the climate change scenario.

Assessment of farmers’ knowledge and perceptions of coffee yield reduction due to weeds and their management in Ethiopia

“…This is because herbicides are less labor-intensive and more efficient than mechanical and cultural weed control techniques. The expense, labor-intensive, consumes a high amount of energy, and above all, results in major soil erosion problems of mechanical weed management reported [ 36 , 37 ]. The intensive use of herbicides to control weeds has been reported by several scholars with various drawbacks, such as disturbances to the environment and health problems for human beings [ 38 , 39 ].…”

Assessing the Effect of Weed Management Practices on Weed Flora, Growth and Yield of Fodder Maize (Zea mays L.)

“…"Weed management is a severe issue in forage crop production and weeds play a large piece in fodder maize production. Worldwide yield losses in maize due to weeds are estimated to be around 37%" [8]. "Farmers usually give prime importance to few cultural practices and neglect other factors like weed control" [9].…”

Minimizing Weed Impacts and Yield Losses by Application of Broad-Spectrum Herbicides in Maize in the Central Highland of Ethiopia

“…Despite criticism that its foliage remains pesticide in the surroundings, biochemical regulator consumption is recognized as an improved substitute for physical weeding for the reason that it is economical, more rapid, and offers improved regulators in good well-being as raised biological yield (Aladesanwa and Adejoro 2009;Kumawat et al 2019;Iqbal et al 2020;Imran et al 2021). On the other hand, its letdown to deliver extended period weed regulator in maize in current periods has required investigation designed for another weed regulator package by maize growers in Ethiopia.…”