Striga hermonthica distribution and infestation in Ghana and Togo on grain crops
1991
Vogt, W. | Sauerborn, J. | Honisch, M. (University of Hohenheim, Stuttgart (Germany). Institute of Plant Production in the Tropics and Subtropics)
To determine the causes of Striga hermonthica infestation, 219 fields planted with sorghum, millet and maize were investigated in 1988 in Ghana and Togo. 27 (%) of all planting holes were infected by S. hermonthica. The infestation by Striga depends on local population density. 0.1 (%) of the planting holes were infested if the population density of the area is 1-10 inhabitants/km2. The infestation increases up to 40 (%) if the population density is more than 50 inhabitants/km2. The infestation is about 30 (%) on sites with soils which are characterized by a low moisture, a high gravel or a low organic matter content. The infestation decreases with improving soil conditions
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