Weed Management in Bush Type Cowpea (Vigna unguiculata subsp. unguiculata (L) Verdcourt)

J.K. Sinchana, Sheeja K. Raj, K. Prathapan

Abstract


A field experiment was conducted at Coconut Research Station, Balaramapuram, Kerala during Kharif 2019 (June to September) to arrive at a cost-effective weed management practice for bush type cowpea. The experiment was conducted in RBD with seedbed preparation as first factor and weed management practices as second factor. Seedbed preparation comprised of stale seedbed and normal seed bed and weed management practices comprised of dried banana leaf mulch alone @ 10 t ha-1, dried banana leaf mulch @ 10 t ha-1 followed by (fb) post emergence application of imazethapyr orquizalofop-p-ethyl @ 50 g ha-1at 25 DAS, pre-emergence application of diclosulam @ 12.5 g ha-1 fb quizalofop-p ethyl @ 50 g ha-1 or hand weeding at 25 DAS, hand weeding at 20 and 40 DAS and weed check. The results revealed that pod yield of bush type cowpea reduced by 70 per cent due to weed infestation. Stale seedbed significantly reduced the total weed density and dry weight and recorded higher pod yield compared to normal seedbed. Among the weed management practices, mulching with dried banana leaf @ 10 t ha-1 followed by quizalofop-p-ethyl application (50 g ha-1) at 25 DAS recorded the lowest weed dry weight (3.77 g m-2), the highest weed control efficiency (93%), pod yield (7589 kg ha-1) and B:C ratio (1.71). Pre-emergence application of diclosulam fb application of quizal of op-p ethyl at 25 DAS recoded higher WCE than hand weeding twice but recorded lesser yield. Among the treatment combinations, stale seedbed or normal seedbed + dried banana leaf mulching @ 10 t ha-1 fb quizalofop-p-ethyl@ 50 g ha-1 at 25 DAS recorded higher pod yield and B:C ratio (7731.7 kg ha-1 and 1.72 and 7446.3 kg ha-1 and 1.70, respectively) with a WCE of 95 and 91 per cent.


Keywords


Pest management

Full Text:

PDF

References


Agarwal, A, Singh, G., Ram, H, and Khanna, V. 2014. Effect of post-emergence application of imazethapyr on symbiotic activities, growth and yield of black gram (Vigna mungo) cultivars and its efficacy against weeds. Indian J. Agron., 59 (3): 421-426.

Borghi, E., Costa, N.V., Crusciol, C.A.C., and Mateus, G.P. 2008. Influence of the spatial distribution of maize and Brachiaria brizantha intercropping on the weed population under no-tillage. Planta Daninha. 26 : 559–568.

Kaur, S., Kaur, T., and Bhullar, M.S. 2016. Imidazolinone herbicides for weed control in green gram. Indian J. Weed Sci., 48 (1): 37-39.

Kostena, E. 2014. The effect of different types of straw mulches on weed control in vegetable cultivation. J. Ecol. Eng., 15 (4): 109-117.

Meena, K.K., Nepalia, V., Singh, D., Sharma, M., and Upadhyay. B. 2017. Effect of weed management and sulphur on weed management, soybean (Glycine max) yield and associated quality traits. Legume Res., 40 (6):1083-1087.

Nainwal, R.C., Saxena, S.C., and Singh, V.P. 2010. Effect of pre and post emergence herbicides on weed infestation and productivity of soybean. Indian J. Weed Sci., (1&2): 17-20.

Singh, M.K. and Saini, S.S. 2008. Planting date, mulch, and herbicide rate effects on the growth, yield, and physicochemical properties of menthol mint (Mentha arvensis L.). Weed Technol. 22: 691–698.

Singh, M.K. and Singh, A.2012. Effect of stale seed bed method and weed management on growth and yield of irrigated direct seeded rice. Indian J. Weed Sci., 44(3): 176-180.

Singh, S.P., Singh, V.P., Nainwal, R.C., Tripathi, N., and Kumar, A. 2009. Efficacy of diclosulam on weeds and yield of soybean. Indian J. Weed Sci., 41 (3 &4): 170-173.

Shamala, K., Sindhu, P.V., and Meera V. Menon. 2017. Effect of weed management practices on growth and yield of okra (Abelmoschus esculentus (L.) Moench.). J. Trop. Agric., 55 (1): 57-62.

Standifer L.C. 1980. In: Proceedings of the 33rd Annual Meeting of the Southern Weed Science Society. p.254.

Tripathi, S.S. and Singh. 2001. Critical period of weed competition in summer cowpea (Vigna unguiculata L.). Indian J. Weed Sci., 33: 67–68.


Refbacks

  • There are currently no refbacks.


A KAU publication [CODEN: JTAGEI; ISSN 0971-636X; eISSN 0973-5399]