Weed dynamics, productivity and economics of kharif maize (Zea mays L.) under diverse weed management options in the Tarai region of India
DOI:
https://doi.org/10.59797/ija.v70i3.6042Keywords:
Temobotrione, Topramezone, Halosulfuron methyl, Weed management, MaizeAbstract
Weed infestation is one of the major threats to the efficient production of kharif maize in the Tarai region of India. Hence, a field study was conducted in three times replicated Randomized block designing by involving twelve different weed management treatments viz., T1: Atrazine 1000 g/ha (PE) fb hand hoeing at 21 DAS; T2: Tembotrione 120g/ha at 20 DAS; T3: Topramezone 25.2 g/ha at 20 DAS; T4: Atrazine 1.0 kg/ha (PE) fb tembotrione 120 g/ha at 20 DAS; T5: Atrazine 1.0 kg/ha (PE) fb topramezone 25.2 g/ha at 20 DAS; T6: Tembotrione 120 g/ha at 20 DAS fb halosulfuron methyl 67.5 g/ha at 30 DAS; T7: Topramezone 25.2 g/ha at 20 DAS fb halosulfuron methyl 67.5 g/ha at 30 DAS; T8: Atrazine 1.0 kg/ha (PE) + Wheat residue mulch 5t/ha; T9: Maize+mungbean (1:1) intercropping; T10: Two Hand Weeding at 20 and 40 DAS; T11: Weed-free and T12: Weedy check at Pantnagar during 2023 to find out the best weed management option for profitable maize production. The lowest weed density was achieved with hand weeding twice at 20 and 40 days after sowing (DAS). This was closely followed by treatments of atrazine 50% WP at 1000 g/ha (PE) fb hand hoeing at 21 DAS, atrazine 50% WP at 1000 g/ha (PE) fb tembotrione at 120 g/ha (PoE) and atrazine 50% WP at 1000 g/ha (PE) fb topramezone at 25.2 g/ha (PoE). Hand weeding at 20 and 40 DAS, atrazine 50% WP at 1000 g/ha (PE) fb hand hoeing at 21 DAS and the sequential application of atrazine 50% WP at 1000 g/ha (PE) followed by either tembotrione at 120 g/ha or topramezone at 25.2 g/ha proved as effective as weed free treatment and recorded significantly higher grain yield with higher B:C ratio.
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