Cowpea, lablab and soybean forage crops are vulnerable to serious insect damage from sowing until about four weeks after seedling emergence. Cowpea [Vigna unguiculata (L.) Walp] is an important crop for smallholder farmers in the marginal areas of sub-Saharan Africa. Published online by Cambridge University Press:  Harris, P. M. VE • Seedling emergence. Elston, J. West and Francois (1982) found that vegetative yield decreased more with increasing soil salinity than dry seed yield. Find out more about this exciting new development, Using our new visualization tools you can, Using our new highlighting and annotation tool you can, remove selected records that are not saved in My CABI, sign you out of your Thereafter, a pot trial was conducted to evaluate cowpea response to water stress imposed at different growth stages under varying growth temperatures. session so others can sign in. 2000: pp. CAB Direct Aphids ( Aphis craccivora Koch) are an important vegetative stage pest of cowpea in Africa. Varlett Grancher , C. & Bonhomme , R. ( 1974 ). "relatedCommentaries": true, It is grown extensively in the low lands and mid-altitude regions of Africa (particularly in the dry savanna) sometimes as sole crop but more often intercropped with cereals such as sorghum or millet . Muchow, R.C. Depending on temperature, fresh-market (green-mature) peas are ready for harvest 16 to 17 days after bloom (60 to 90 days after planting). In colder climate somewhat sandy soil preferred as crop mature earlier in them. K2809 in controlled environments, Beading University / Iit A Tropical Grain Legume Physiology Project, Growth reproductive development and yield of effectively nodulated cowpea plants in contrasting aerial environments, Utilisation de l'nergie solaire par un culture de Vigna Sinesis. If you should have access and can't see this content please, Barley and its environment. Lawn, R.J. It all depends on the type of season, if it is the rainy season, no water is given for the cowpea crop, before rainy season couple of irrigations are preferred in cowpea farming. Growth Stages of Cowpea (Vigna unguiculata unguiculata) Figure 1 Figure 2 Figure 3. Leach, G.J. Its long taproot and wide, vegetative spread make it an excellent plant for erosion Allelopathic compounds in the plant may help to suppress weeds (Clark, 2007). Plants can become sticky with honey-dew excreted by the aphids. Within a crop there is likely to be considerable variability, particularly at maturity and harvest. Cowpea grain, nutritious and inexpensive, serves as a source of cheap protein for both rural and urban consumers. V3 • 3rd trifoliolate leaf unfolded at node 5. Muchow, R.C. The pod weight ratio was relatively constant and there was a strong relationship between final number of pods and total plant dry weight. Get access to the full version of this content by using one of the access options below. and 1987 UNIVERSITY, OF NAIKU3* … Robertson, M.J. Leadley, Paul W. The youngest expanded trifoliate leaves of the highly susceptible cultivars FS-68, HFC 42-1, JC-5 and JC-10 were mechanically inoculated with alfalfa mosaic alfamovirus, cowpea aphid-borne mosaic virus [blackeye cowpea mosaic potyvirus], southern bean mosaic sobemovirus cowpea str., blackeye cowpea mosaic potyvirus and cowpea mosaic comovirus. Maas and Poss (1989) investigated the effect of salt stress on cowpea applied at three different growth stages: vegetative, flowering, and pod-filling. Husain, M. M. V. Stability of grain weight, Effects of night temperature and photoperiod on the reproductive ontogeny of cultivars of cowpea and of soyabean selected for the wet tropics, International Institute or Tropical Agriculture, The growth and development of cowpeas under tropical field conditions. 2 Figure 3 inoculation is advisable only if cowpea is grown for the first 50 days, in.: 27 March 2009 all growth stages ( Bressani critical growth stages of cowpea 1992 ) there was a strong relationship between final of... Nigeria is described maturity: green snaps, green-mature, and dry Fatokum..., growth, yield parameters, Asaba, Nigeria reproductive stage is the most phase. The cowpea grain, nutritious and inexpensive, serves as a source of cheap protein both! 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