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Estimation of the seedbank of Striga spp. (Scrophulariaceae) in Malian fields and the implications for a model of biocontrol of Striga hermonthica
Author(s) -
SMITH M. C.,
WEBB M.
Publication year - 1996
Publication title -
weed research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.693
H-Index - 74
eISSN - 1365-3180
pISSN - 0043-1737
DOI - 10.1111/j.1365-3180.1996.tb01804.x
Subject(s) - striga hermonthica , striga , scrophulariaceae , parasitic plant , agronomy , biology , crop , botany , host (biology) , germination , ecology
Summary Striga seeds were extracted from soils collecled in Mali and the viahility of these seeds was estimated. Striga seeds were found in 45 of 46 samples taken from 23 fields. Siriga hermonthica (Del.) Benth. growmg on the host crop millet, was present at all 46 sites sampled. The a size uf the Striga seedbaiik measured lo a depth of 15 cm was estimated to be 38 800 m ‐2 of surface area (geometnc mean 11 500). The average number of S. hermonthica plants observed per millei hill was 8.83 (geometric mean 3.89) or 13.98 m ‐2 (gcometrie mean 5.69 m ‐2 ). Higher crop hill densities tended to result in higher densities of emerged S. hermonthica per hill. The relationship between seeds m ‐2 and S. her‐monhica plants m ‐2 was fitied to a reetungular hyperbola and used to reassess an existing model of S. herniouhica control.