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A Method for Assessing the Natural Control of Cyst Nematode Populations

A Method for Assessing the Natural Control of Cyst Nematode Populations A METHOD FOR ASSESSING THE NATURAL CONTROL OF CYST NEMATODE POPULATIONS BY D. H. CRUMP Rothamstcd Experimental Station, Harpenden, Herts., England, AL5 2JQ A method is described for assessing the ability of a soil to suppress multiplication of the beet cyst nematode and for isolating the fungal parasites involved. Using triangular-shaped observa- tion chambers with removable sides, continual assessments were made of the numbers of females and new cysts developing on sugar beet roots on two sides of the chamber. Females were removed from the third side of each chamber to assess the numbers infected and to isolate the fungi from them. Eight soils with varying histories of cropping with sugar beet were tested. In suppressive soils the numbers of females declined during the experimental period, whilst in non- suppressive soils the numbers of females steadily increased. The numbers of healthy females sur- viving at the end of the experimental period, expressed as a percentage of the maximum number of females produced, gave a comparative measure of suppressiveness of the eight soils. Cylin- drocarpon destructans was the fungus isolated most commonly from infected females. Keywords: beet cyst nematode, biological control, fungal parasites, nematophagous fungi. The natural control of http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nematologica Brill

A Method for Assessing the Natural Control of Cyst Nematode Populations

Crump, D.H.
Nematologica , Volume 33 (2): 12 – Jan 1, 1987
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Publisher
Brill
Copyright
Copyright © Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0028-2596
eISSN
1875-2926
DOI
10.1163/187529287X00362
Publisher site
See Article on Publisher Site

Abstract

A METHOD FOR ASSESSING THE NATURAL CONTROL OF CYST NEMATODE POPULATIONS BY D. H. CRUMP Rothamstcd Experimental Station, Harpenden, Herts., England, AL5 2JQ A method is described for assessing the ability of a soil to suppress multiplication of the beet cyst nematode and for isolating the fungal parasites involved. Using triangular-shaped observa- tion chambers with removable sides, continual assessments were made of the numbers of females and new cysts developing on sugar beet roots on two sides of the chamber. Females were removed from the third side of each chamber to assess the numbers infected and to isolate the fungi from them. Eight soils with varying histories of cropping with sugar beet were tested. In suppressive soils the numbers of females declined during the experimental period, whilst in non- suppressive soils the numbers of females steadily increased. The numbers of healthy females sur- viving at the end of the experimental period, expressed as a percentage of the maximum number of females produced, gave a comparative measure of suppressiveness of the eight soils. Cylin- drocarpon destructans was the fungus isolated most commonly from infected females. Keywords: beet cyst nematode, biological control, fungal parasites, nematophagous fungi. The natural control of

Journal

Nematologica – Brill

Published: Jan 1, 1987

Keywords: nematophagous fungi; beet cyst nematode; fungal parasites; biological control

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