Abstract
In two glasshouse experiments, relations between sugarbeet root dry weight (y, expressed as a percentage of the maximum dry root weight), and preplanting populations of Heterodera schachtii (P(i)) were described by the equation y = 100(Z)(P(i)-T), in which Z = a constant slightly smaller than 1, and T = the tolerance limit (the value of P(i) below which damage was not measureable). T varied with temperature; it was 65 eggs/100 g soil at 23 and 27 C and 430 eggs/100 g soil at 19 C. At 15 and 31 C there was no loss of root dry weight up to the maximum preplanting populations tested. In a field experiment in the Imperial Valley the relation between root yield (y) and P(i) was y = 100 (0.99886)(P(i) ) - 100, and the tolerance limit was 100 eggs/100 g soil.
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Claims 6
Claim · model-written summary
In two glasshouse experiments, sugarbeet root dry weight, as a percentage of the maximum, decreased with preplanting populations of Heterodera schachtii according to an exponential equation with a tolerance limit.
- Taxon
- sugarbeet
Beta vulgaris subsp. vulgarise0 - Interactor
- Heterodera schachtiiHeterodera schachtiie0pest
- Outcome
- root dry weighte0
- Direction
- decreaseinferrede0
- Setting
- glasshousee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In two glasshouse experiments, relations between sugarbeet root dry weight (y, expressed as a percentage of the maximum dry root weight), and preplanting populations of Heterodera schachtii”
Claim · model-written summary
The tolerance limit for sugarbeet damage by Heterodera schachtii was 65 eggs/100 g soil at 23 and 27 C in the glasshouse.
- Taxon
- SugarbeetBeta vulgaris subsp. vulgarist0
- Outcome
- tolerance limite1
- Value
- 65 eggs/100 g soile0
- Qualifier
- at 23 and 27 Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it was 65 eggs/100 g soil at 23 and 27 C”
e1“T = the tolerance limit”
t0“Sugarbeet”
Claim · model-written summary
The tolerance limit for sugarbeet damage by Heterodera schachtii was 430 eggs/100 g soil at 19 C in the glasshouse.
- Taxon
- SugarbeetBeta vulgaris subsp. vulgarist0
- Outcome
- tolerance limite1
- Value
- 430 eggs/100 g soile0
- Qualifier
- at 19 Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“430 eggs/100 g soil at 19 C”
e1“T = the tolerance limit”
t0“Sugarbeet”
Claim · model-written summary
At 15 and 31 C there was no loss of sugarbeet root dry weight up to the maximum preplanting populations of Heterodera schachtii tested.
- Taxon
- SugarbeetBeta vulgaris subsp. vulgarist0
- Outcome
- loss of root dry weighte0
- Qualifier
- At 15 and 31 Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 15 and 31 C there was no loss of root dry weight up to the maximum preplanting populations tested”
t0“Sugarbeet”
Claim · model-written summary
In a field experiment in the Imperial Valley, sugarbeet root yield decreased with preplanting population of Heterodera schachtii as y = 100 (0.99886)^(Pi) - 100.
- Taxon
- SugarbeetBeta vulgaris subsp. vulgarist0
- Outcome
- root yielde0
- Direction
- decreaseinferrede0
- Setting
- Imperial Valleye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In a field experiment in the Imperial Valley the relation between root yield (y) and P(i) was y = 100 (0.99886)(P(i) ) - 100, and the tolerance limit was 100 eggs/100 g soil”
t0“Sugarbeet”
Claim · model-written summary
In the Imperial Valley field experiment the tolerance limit for sugarbeet was 100 eggs/100 g soil.
- Taxon
- SugarbeetBeta vulgaris subsp. vulgarist0
- Outcome
- tolerance limite0
- Value
- 100 eggs/100 g soile0
- Setting
- Imperial Valleye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In a field experiment in the Imperial Valley the relation between root yield (y) and P(i) was y = 100 (0.99886)(P(i) ) - 100, and the tolerance limit was 100 eggs/100 g soil”
t0“Sugarbeet”