Microplot experiments were established in 1992, 1993, and 1994 to investigate the relationships among Macrophomina phaseolina, Criconemella xenoplax, mad Tylenchorhynchus annulatus on grain sorghum in Louisiana. A factorial treatment arrangement of two grain sorghum hybrids (De Kalb DK 50 and Pioneer hybrid 8333), three levels of M. phaseolina (0, 10, and 100 colony-forming units (CFU)/g soil),...

six belonolaim species were collected from grasslands of sabalan region. the found species belong to genera amplimerlinius, merlinius, nagelus, neodolichorhynchus, paramerlinius and tylenchorhynchus. among the found species, neodolichorhynchus judithae is reported for the first time from iran and is characterized byhaving offset head, cuticule with 16 longitudinal ridges, delicate stylet 21-23 ...

INTRODUCTION It is widely accepted that oogenesis normally stops early in mammalian development (see Brambell, 1956; Franchi, Mandl & Zuckerman, 1962). Nevertheless, it has been claimed that mitotically active oogonia, and oocytes in early stages of meiotic prophase occur in mature specimens of Galago senegalensis (Gerard, 1920, 1932; Gerard & Herlant, 1953; Herlant, 1961; Petter-Rousseaux, 196...

Pinus edulis and Juniperus monosperma seedlings were inoculated separately with each of seven nematode species, and grown for 9 months at 20 C soil temperature. Hoplolaimus galeatus, Rotylenchus pumilis, Tylenchus exiguus, and Xiphinema americanum parasitized P. edulis seedlings, but did not significantly reduce seedling growth. Pinus edulis was not a host for Tylenchorhynchus cylindricus, Aphe...

The ITS region from a wide taxonomic range of nematodes, including secernentean and adenophorean taxa, and free-living, entomopathogenic, and plant-parasitic species, was evaluated as a taxonomic marker. Size of the amplified product aided in the initial determination of group membership, and also suggested groups that may require taxonomic reevaluation. Congeneric species often displayed ident...

Trichoderma spp. are common soil fungi which influence tile development of plant-pathogenic fungi in the soil (1, 8). Yang et al. (9) found that T. harzianum influenced the severity of Fusarium wilt of cotton in the presence of Meloidogyne incognita. We report herein that the survival of two other plant-parasitic nematodes also was influenced by addit ion of cornminuted cultures of Trichoderrna...

Seedlings of longleaf pine (Pinus palustris) were grown in 20-cm pots for 5 to 7 months in the greenhouse following inoculation with a high or low level of one of seven species of plant-parasitic nematodes. Belonolaimus longicaudatus and Helicotylenchus dihystera had no effect on seedling growth. High inoculum densities of Hoplolaimus galeatus and Tylenchorhynchus claytoni caused a significant ...