Effect of post–emergence application of cyhalofop-butyl for weed management in direct-seeded rice (Oryza sativa)

BIPIN KUMAR; RAJVIR SHARMA; SHASHI BALA SINGH; LIVLEEN SHUKLA; TUSHAR RAMCHANDRA KHARE

doi:10.56093/ijas.v84i8.43142

Authors

BIPIN KUMAR Indian Agricultural Research Institute, New Delhi 110 012
RAJVIR SHARMA Indian Agricultural Research Institute, New Delhi 110 012
SHASHI BALA SINGH Indian Agricultural Research Institute, New Delhi 110 012
LIVLEEN SHUKLA Indian Agricultural Research Institute, New Delhi 110 012
TUSHAR RAMCHANDRA KHARE Indian Agricultural Research Institute, New Delhi 110 012

https://doi.org/10.56093/ijas.v84i8.43142

Keywords:

Butachlor, Cyhalofob-butyl, Direct-seeded rice, Pretilachlor, Weeds

Abstract

A field experiment was conducted during rainy season of 2009 at the research farm of the Indian Agricultural Research Institute, New Delhi to evaluate the appropriate combination of pre-emergence and post-emergence herbicides in direct-seeded rice (Oryza sativa L.). All the weed control treatments brought significant increase in grain (25-52%) and straw yield (27-58%) as compared to season long crop weed competition. Cyhalofop-butyl residues in soil were found below detectable level indicating safety to soil microbial population and succeeding crop. It may be concluded that weeds can be managed during critical period of competition with the sequential application of pretilachlor (750 g/ha) as pre-emergence followed by post- emergence application of cyhalofop-butyl (60 g/ha) at 30 DAS in direct-seeded rice.

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