Vol. 9, Issue 6, Part H (2025)

A field study was conducted on clay loam soils at the Agricultural Research Station, Jangamaheswarapuram, Guntur District, Andhra Pradesh, India, during 2017-18 and 2018-19. The study aimed to assess the efficacy of Triafamone 200 SC herbicide in transplanted rice and its residual effects on succeeding blackgram. Among the treatments, T₁₀ (Triafamone 200 SC @ 100 g a.i. ha⁻¹ at 2-3 DAT) and T₅ (Triafamone 200 SC @ 100 g a.i. ha⁻¹ at the 2-3 leaf stage) caused slight phytotoxicity, characterized by stunted Rice growth and yellowing of leaves, which was observed 7 days after application. However, plants recovered completely within a week. The weed-free treatment (T₁₃) recorded the highest grain yields of 5762 kg ha⁻¹ and 6376 kg ha⁻¹ in 2017-18 and 2018-19, respectively, followed closely by T₁₂ (Two hand weedings), T₁₀, and T₅. The untreated control (T₁) yielded significantly lower at 3066 kg ha⁻¹ and 3825 kg ha⁻¹ during the respective years. The succeeding Blackgram crop showed no signs of phytotoxicity or adverse effects, including on germination, growth and yield.