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ARS Home » Midwest Area » Urbana, Illinois » Soybean/maize Germplasm, Pathology, and Genetics Research » Research » Publications at this Location » Publication #75758
Title: POPULATION DYNAMICS OF HETERODERA GLYCINES AND ITS BACTERIAL PARASITE, PASTEURIA SP.

Author
item ATIBALENTJA, N - UNIV OF ILLINOIS
item Noel, Gregory

Submitted to: Nematropica
Publication Type: Abstract Only
Publication Acceptance Date: 7/7/1996
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: An undescribed species of Pasteuria infecting Heterodera glycines was reported in 1994. Population dynamics of second-stage juveniles (J2) races 3 and 4, the percentage of J2 encumbered with Pasteuria endospores, and the number of endospores attached to each J2 were determined from soil samples obtained from naturally infested microplots. Samples were collected at 2-week intervals during the 1994 and 1995 growing seasons (April-October). Significant seasonal fluctuations in nematode population densities, percentage of endospore-laden J2,and number of endospores per J2 were observed for both races. Nematode densities were low at the beginning of each season, then increased to their highest levels in July 1994 and September 1995. The mean number of Pasteuria endospores per J2 per sampling date ranged from one to five in 1994, and from one to twenty in 1995. Overall, the percentage of infected J2 was greater than 45% throughout the study.