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Birsa Agricultural University, Ranchi

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Subject: Agronomy × Author: Binod Kumar × End date: 2018 × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Integrated Weed Management In Pigeonpea + Soybean Intercropping System
    (Birsa Agricultural University, Ranchi, 1996) Binod Kumar; K. Prasad
    The growth and development of pigeonpea and maize in pure stand as well as Intercropping systems was studied in relation to weed management. The slow vegetative growth of pigeon pea in the initial stage might he helpful in keeping this crop as an inter crop with maize after adopting suitable crop production measures Slow vegetative growth of pigeonpea up to first 5.10 weeks of sowing (Gangwar, 1992) provides an opportunity to weeds to germinate and to develop their vigour and this situation is also favourable for crop-weed competition for space, niatients, moisture and sunlight. With this view, an experiment was conducted in split plot design keeping cropping systems in main plot (sole pigeonpea, sole maize and intercopping of pigeonpea + maize) and weed management (Pendimethalin @ 1.0 kg. a.i. fha, fluchloralin 1.0 kg. a.i./ha, metolachlor e 0.75 kg. a /ha as pre. emergence, hand weeding at 15,30,45,60 DAS and control) sown in 60 c.m. apart rows at university furt during kharif season of 1994-95. It was found that suppression of weeds was maximum (232.66 / m) in intercropping system followed by sole cropping of maize (252.58/m) and pigeonpea (298.46/m). All the weed control measures were significantly superior to weedy check with respect to weed population Effect of pendimethalin & fluchloralin was significantly better than control. But manual weeding was more effective than application of herbicides On the basis of pigeonpea equivalent yield of the system, intercropping gave maximum veild (22.90 q/ha) followed by sole crop of pigeonpea (14.00 q/ha) and maize (10.91 q/ha). Effect of fluchloralin (1.0 kg. a.i./ha) was found superior to other weed control measures except hand weeding. These findings are in accordance with the result obtained by Prasad and Srivastava (1991). It was further observed that benefit: cost ratio was more in intercropping (1.54) system than that found under sole crop of maize (1.24) or pigeonpea (0.97). Fluchloralin treated plots gave maximum benefit: cost ratio (1.49) followed by metolachlor (1.27) and Pendimethalin (1.24).