High seed cost accompanied by poor germination and seedling performance renders cabbage nursery and field production enterprises unsustainable to many small-scale growers in tropical and sub-tropical countries. In most nurseries, adverse ecological conditions and pest damage are among the major factors responsible for poor seedling performance. The objective of this study was to test the potential use of eco-friendly net (EFN) covers as a low cost technology for sustainable cabbage seedling production. The study was a two-season experiment conducted using a randomized complete block design with five replications and two treatments. Treatments were: the standard open field transplant production (control) and transplant production under 0.4 mm mesh polyethylene net covering. EFN covering increased both temperature and relative humidity, enhanced seedling growth and reduced insect pest damage. Seed germination and seedling emergence were under the net covering earlier. Higher seed germination and seedling survival were recorded under the EFN treatment, indicating a potential for reducing the seed requirement per unit area of cabbage production. Seedlings grown under the nets had higher stomatal conductance and leaf chlorophyll content; furthermore, they grew taller, with more leaves within a shorter period of time compared to the control seedlings. The use of EFN in cabbage nurseries offers a sustainable technology for enhancing seedling performance by reducing pest infestation, thereby lowering production cost and improving the grower’s income.
References
[1]
Wambani, H.; Nyambati, E.; Kamidi, M.; Mulati, J. Participatory evaluation of cabbage varieties as a source of food and income for smallholder farmers in north-western Kenya. In Proceedings of the African Crop Science Conference, Nairobi, Kenya, 9–15 August 2007; pp. 355–357.
[2]
Ministry of Agriculture. Country Statistics Annual Report; Government Press: Nairobi, Kenya, 2012; p. 7.
[3]
HCDA (Horticultural Crops Development Authority). Domestic Marketing and Market Infrastructure in Kenya; Government Press: Nairobi, Kenya, 2012; p. 15.
Taylorson, R.B. Environmental and chemical manipulation of weed seed dormancy. Rev. Weed Sci. 1987, 3, 135–154.
[6]
Bewley, J.D.; Black, M. Seeds: Physiology of Development and Germination, 2nd ed.; Plenum Press: New York, NY, USA, 1994.
[7]
Went, W. Experimental control of plant growth. J. Am. Pharm. Assoc. 1958, 47, 307–308.
[8]
Oduor, G.I.; Lohr, B.; Seif, A.A. Seasonality of major cabbage pests and incidence of their natural enemies in central Kenya. In the Management of Diamondback Moth and Other Crucifer Pests, Proceedings of the Third International Workshop, Kuala Lumpur, Malaysia, 29 October–1 November 1996; Malaysian Agricultural Research and Development Institute (MARDI): Kuala Lumpur, Malaysia, 1997; pp. 37–43.
[9]
Gillman, D.H. Sooty Mold. Fact Sheet, University of Massachusetts, 2005. Available online: http://extension.umass.edu/landscape/fact-sheets/sooty-mold (accessed on 11 May 2012).
[10]
Reynolds, H.T.; Volk, T. Scorias spongiosa,the beech aphid poop-eater. Tom Volk’s Fungus of the Month, 2007. Available online: http://botit.botany.wisc.edu/toms_fungi/ (accessed on 3 March 2012).
[11]
Shahak, Y. Photo-Selective netting for improved performance of horticultural crops. A review of ornamental and vegetable studies carried out in Israel. Acta Hort. 2006, 770, 161–168.
[12]
Teitel, M.; Liron, O.; Haim, Y.; Seginer, I. Flow through inclined and concertina-shape screens. Acta Hort. 2008, 801, 99–106.
[13]
ISTA (International Seed Testing Association). International rules for seed testing. Seed Sci. Technol. 1985, 13, 307–513.
[14]
Raven, P.; Ray, H.; Evert, F.; Eichhorm, S.E. Biology of Plants, 7th ed.; W.H. Freeman and Company Publishers: New York, NY, USA, 2005; pp. 504–508.
[15]
Song, S.W.; Yi, L.Y.; Liu, H.C.; Sun, G.W. Effect of color shading - nets on the growth and physiological characteristics of chieh-qua seedling. Adv. Mater. Res. 2011, 366, 197–201, doi:10.4028/www.scientific.net/AMR.366.197.
[16]
Fajinmi1, A.A.; Fajinmi, O.B. Incidence of okra mosaic virus at different growth stages of okra plants (Abelmoschus Esculentus (L.) Moench) under tropical condition. J. Gen. Mol. Virol. 2010, 2, 28–31.
[17]
Taub, D. Effects of rising atmospheric concentrations of carbon dioxide on Plants. Nature Educ. Knowl. 2010, 1, 21.
[18]
Licciardi, S.; Assogba-Komlan, F.; Sidick, I.; Chandre, F.; Hougard, J.M.; Martin, T. A temporary tunnel screen as an eco-friendly method for small-scale farmers to protect cabbage crops in Benin. Int. J. Trop. Insect Sci. 2007, 27, 152–158, doi:10.1017/S1742758407883184.
[19]
Martin, T.; Assogba-komlan, F.; Houndete, T.; Hougard, J.M.; Chandre, F. Efficacy of mosquito netting for sustainable small holder’s cabbage production in Africa. J. Econ. Entomol. 2006, 99, 450–454, doi:10.1603/0022-0493-99.2.450.
[20]
Antignus, Y.; Ben-Yakir, D. Ultraviolet-absorbing barriers, an efficient integrated pest management tool to protect greenhouses from insects and virus disease. In Insect Pest Management: Field and Protected Crops; Rami Horowitz, A., Ishaaya, I., Eds.; Springer: New York, NY, USA, 2004; p. 365.
[21]
Khorsheduzzaman, A.K.M.; Nessa, Z.; Rahman, M.A. Evaluation of mosquito net barrier on cucurbit seedling with other chemical, mechanical and botanical approaches for suppression of red pumpkin beetle damage in cucurbit. Bangladesh J. Agric. Res. 2010, 35, 395–401.
[22]
Skipp, R.A.; Christensen, M.J. Invasion of white clover roots by fungi and other soil microorganisms. N. Z. J. Agric. Res. 1982, 25, 97–101, doi:10.1080/00288233.1982.10423377.
