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- Title
The relationship between numbers of Heterodera schachtii and sugar beet yields on a mineral soil, 1978-81.
- Authors
COOKE, D. A.
- Abstract
SUMMARY In a 4-yr field experiment on a mineral soil infested with beet cyst nematode ( Heterodera schachtii) the relationship between root yield of sugar beet ( y) and initial population of H. schachtii (Pi) fitted the equation: y= y min + (y max - y min) ZPi-T y min = 7·7 t/ha, y max = 39·4 t/ha, 2 = 0·99938 and T= 0 eggs/100 g soil. From this information and that obtained during a recent survey of 2766 beet fields, the total national root yield loss caused by H. schachtii was estimated as approximately 10 000 t/annum on mineral soils and (assuming a similar yield loss relationship on all soil types) 30 000 t/annum on organic soils. No consistent differences in efficiency of extracting cysts were found between the Fenwick Can and the flotation column. A bioassay technique was as effective as cyst extraction techniques in identifying infested soils.
- Publication
Annals of Applied Biology, 1984, Vol 104, Issue 1, p121
- ISSN
0003-4746
- Publication type
Article
- DOI
10.1111/j.1744-7348.1984.tb05594.x