Responses of Spinach (Spinacia Oleracea L.) To Meloidogyne Incognita

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Waudo,S. W.
Mbugua, J.W.
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Root-knot nematode-infected plants form synctia, the multi-nucleate giant cells, in the vascular parenchyma and galls (Christie, 1936). Galls give a rough and clubbed appearance to a root system (Dropkin, 1980). The synctia, galls, and mechanical pressure exerted by the nematode may disrupt the xylem elements (Christie, 1936 and Dropkin, 1980). Water transport and mineral translocation are hampered in the poorly developed vascular system (Christie, 1936 and Dropkin, 1980). Because of this, nematode infected Plants wilt during dry periods (Dropkin, 1980). Other symptoms include stunting, chlorosis, suppression of blossom and fruit formation, development of a bushy root system, a higher root to shoot ratio, discoloration of the root system, and reduced yield (Dropkin, 1980). Initial nematode density (Barker and Olthof, 1976; Barker, Shoemaker, and Nelson, 1976; Seinhorst, 1965 and Wallace, 1971), nematode species (Barker, 1977), plant cultivar (Chitambar and Raski, 1984; Kinlock, 1974; Waudo and Norton, 1983, 1986) and environmental conditions (Bird and Wallance, 1965; Lucas, 1975 and Thomason and Lear, 1961) influence the degree of damage caused to nematode-infected plants. There are no reports on how these factors influence damage to Meloidogyne incognita (Kofoid and White) Chitwood infected spinach (Spinacia oleracea L) plants.
East African Agricultural And Forestry Journal, 52 (4), p. 260-266