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Titolo:
THE DYNAMICS OF THE DECLINE OF THE CEREAL CYST-NEMATODE, HETERODERA-AVENAE, IN 4 SOILS UNDER INTENSIVE CEREAL PRODUCTION
Autore:
KERRY BR; CRUMP DH;
Indirizzi:
AFRC,INST ARABLE CROPS RES,DEPT ENTOMOL & NEMATOL HARPENDEN AL5 2JQ HERTS ENGLAND
Titolo Testata:
Fundamental and applied nematology
fascicolo: 5, volume: 21, anno: 1998,
pagine: 617 - 625
SICI:
1164-5571(1998)21:5<617:TDOTDO>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
VERTICILLIUM-CHLAMYDOSPORIUM GODDARD; MELOIDOGYNE-ARENARIA; PASTEURIA-PENETRANS; PARASITIC FUNGI; GROWTH;
Keywords:
HETERODERA AVENAE; NEMATOPHAGOUS FUNGI; NEMATOPHTHORA GYNOPHILA; POPULATION DYNAMICS; SUPPRESSIVE SOILS; VERTICILLIUM CHLAMYDOSPORIUM;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
23
Recensione:
Indirizzi per estratti:
Citazione:
B.R. Kerry e D.H. Crump, "THE DYNAMICS OF THE DECLINE OF THE CEREAL CYST-NEMATODE, HETERODERA-AVENAE, IN 4 SOILS UNDER INTENSIVE CEREAL PRODUCTION", Fundamental and applied nematology, 21(5), 1998, pp. 617-625

Abstract

Changes in the population density of the cereal cyst nematode, Heterodera avenae, were monitored in four soils in microplots for 10 years. For the first 4 years, half of the microplots were treated each year with drenches of formalin (38 % formaldehyde) prior to sowing with susceptible cereals. Thereafter, plots were sown with susceptible or resistant spring barley or ryegrass to manipulate the numbers of female nematodes and eggs produced each year. After the fourth application of formalin, the densities of the nematophagous fungi, Nematophthora gynophila and Verticillium chlamydosporium, were estimated under each crop in untreated soil and soil previously treated with the partial soil sterilant. Formalin significantly increased nematode populations and reduced the densities of the nematophagous fungi in all soils. By the second year of formalin application, nematode population densities in all soils had increased to levels which caused crop failure in winter wheat; thereafter, populations declined under spring barley unless applications of formalin were continued. Despite continuous cropping with susceptible cereals, populations of the nematode were often not detectable in plots after the eighth year. Changes in the densities of spores of the fungi in soil were closely related to changes in the numbers of nematodes. In soils previously treated with formalin, the fungi had increased to levels similar to those found in naturally suppressive soils within 3 years of discontinuing formalin application and population densities of the nematode had declined to the same levels as in untreated soils. (C) Orstom/Elsevier, Paris.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/11/20 alle ore 14:29:15