ECOLOGY AND PATHOGENICITY OF THE HOPLOLAIMIDAE (NEMATA) FROM THE SAHELIAN ZONE OF WEST-AFRICA .7. HELICOTYLENCHUS DIHYSTERA (COBB, 1893) SHER, 1961 AND COMPARISON WITH HELICOTYLENCHUS MULTICINCTUS (COBB, 1893)GOLDEN, 1956
P. Baujard et B. Martiny, ECOLOGY AND PATHOGENICITY OF THE HOPLOLAIMIDAE (NEMATA) FROM THE SAHELIAN ZONE OF WEST-AFRICA .7. HELICOTYLENCHUS DIHYSTERA (COBB, 1893) SHER, 1961 AND COMPARISON WITH HELICOTYLENCHUS MULTICINCTUS (COBB, 1893)GOLDEN, 1956, Fundamental and applied nematology, 18(6), 1995, pp. 503-511
The geographical distribution and field host plants, population dynami
cs and vertical distribution were studied for the nematode Helicotylen
chus dihystera. The factors influencing the multiplication rate and th
e effects of anhydrobiosis were studied for H. dihystera and H. multic
inctus in the laboratory and showed that absence of H. multicinctus fr
om semi-arid tropics of West Africa might be explained by the effects
of high soil temperature on multiplication rate and low survival rate
after soil desiccation during the dry season. The field and laboratory
observations showed that anhydrobiosis might induce a strong effect o
n the physiology of H. dihystera, nematode numbers being higher after
soil desiccation during the dry season. H. dihystera appeared pathogen
ic to peanut and millet.