Bio-efficacy of herbicide combinations for control of weeds in transplanted rice (Oryza sativa)

P SPANDANA BHATT; M YAKADRI; M MADHAVI; S SRIDEVI; P LEELA RANI

doi:10.56093/ijas.v90i4.102209

Authors

P SPANDANA BHATT Professor Jayashankar Telangana State Agricultural University, Hyderabad, Telangana 500 030, India
M YAKADRI Professor Jayashankar Telangana State Agricultural University, Hyderabad, Telangana 500 030, India
M MADHAVI Professor Jayashankar Telangana State Agricultural University, Hyderabad, Telangana 500 030, India
S SRIDEVI Professor Jayashankar Telangana State Agricultural University, Hyderabad, Telangana 500 030, India
P LEELA RANI Professor Jayashankar Telangana State Agricultural University, Hyderabad, Telangana 500 030, India

https://doi.org/10.56093/ijas.v90i4.102209

Keywords:

Bioefficacy, Herbicide combinations, Transplanting, Weeds

Abstract

The present study during kharif 2013-14 at Professor Jayashankar State Agricultural University, Hyderabad, Telangana to study the efficiency of herbicide combinations for controlling weeds in rice. The study comprised 14 treatments in Randomized block design replicated thrice. During both years of investigation the higher weed control efficiency and herbicide efficiency index was noticed with hand weeding twice at 25 and 45 DAT, pyrazosulfuron ethyl 20 g/ha as PE at 3 DAT followed by manual weeding at 25 DAT and pretilachlor 750 g/ha as PE at 3 DAT followed by metsulfuron methyl + chlorimuron ethyl 4 g/ha as PoE at 25 DAT. Significantly higher grain yield and gross returns were noticed with hand weeding twice at 25 and 45 DAT and was comparable with pyrazosulfuron ethyl 20 g/ha as PE at 3 DAT followed by manual weeding at 25 DAT, pretilachlor 750 g/ha as PE at 3 DAT followed metsulfuron methyl + chlorimuron ethyl 4 g/ha as PoE at 25 DAT and bispyribac sodium 20 g/ha + metsulfuron methyl + chlorimuron ethyl 4 g/ha as PoE at 25 DAT. However, pyrazosulfuron ethyl 20 g/ha as pre emergence at 3 DAT followed by manual weeding at 25 DAT noticed higher net returns and B:C ratio.

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References

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