CHEMICAL WEED MANAGEMENT IN BERSEEM (TRIFOLIUM ALEXZANDRIUM L.)
S. H. PATHAN AND A. B. KAMBLE
Department of Agronomy,
Mahatma Phule Krishi Vidyapeeth, Rahuri (Maharashtra)
(e-mail : pathansarfraj85@gmail.com; drarunkamble@gmail.com)
(Received: 3 July, 2013, Accepted: 29 July, 2013)
SUMMARY
The field experiment was conducted to find out most suitable weed management practices to control of weeds in berseem (Trifolium alexandrium L.). The results indicated that all weed control treatments significantly reduced the density and dry weight of weeds in berseem. Among the weed control treatment T7- Oxyflourfen @ 0.100 kg a.i.ha-1 fb Imazethapyr @ 0.100 kg a.i. ha-1 immediate after harvest of I st cut recorded significantly the lowest total weed count/m2 and its total dry weight at harvest as compared to rest of the treatments except treatment T5 and T6 which were on par with treatment T7.
Among pre emergence application of Oxyflourfen @ 0.100 kg a.i.ha-1 fb post emergence application of Imazethapyr @ 0.100 kg a.i. ha-1 recorded significantly higher WCE (67.88 %) over rest of the treatment but it was at par with treatments T5 and T6. The growth attributes viz., plant height and L: S ratio of berseem was significantly differ due to weed management practices. Plant height was significantly maximum (44.56 cm) with weedy check but it was at par with treatment T7- Oxyflourfen @ 0.100 kg a.i.ha-1 fb Imazethapyr @ 0.100 kg a.i. ha-1 immediate after harvest of I st cut (39.60cm). However, the L: S ratio was significantly higher (0.61) with treatment T7 but it was at par with treatment T5 and T6. All yields attributes and yield parameters viz., GFY, DMY, seed and straw yield and CPY were significantly higher in treatment T7 which was followed by treatment T6. Pre emergence application of oxyflororfen @ 0.100 kg a.i. ha-1 fb Imazethapyr @ 0.100 kg a.i. ha-1 as post emergence registered significantly the highest gross monitory (Rs. 1,11,866 ha-1), net monitory (Rs. 54,810 ha-1) and B:C ratio (1.96) than rest of treatments followed by treatment T6 (Gross monitory Rs.1,01,402 ha-1, net monitory Rs. 47,523 ha-1 and B:C ratio 1.88).
Key words : Weed management, oxyflororfen, fb mazethapyr, berseem, Trifolium alexandrinum