Abstract
SUMMARY From 1970 to 1975, before soil‐applied pesticides were widely used by sugar beet growers in England, virus yellows is estimated to have caused an annual loss representing about 5 per cent of the crop's potential yield, equivalent to about £4·2 million at the 1974 price for beet. At least £0·9 million were spent annually by growers on insecticides to give partial control of yellows, probably giving a yield increase worth thrice that sum. When 20 per cent or more of sugar beet plants show symptoms of virus yellows at the end of August crop yields are appreciably decreased, and the proportion of the national crop area in this category during 1970–75 ranged from less than 1 to 86 per cent (averaging 30 per cent).
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Claims 7
Claim · model-written summary
Virus yellows caused an estimated annual loss of about 5 per cent of potential English sugar beet yield in 1970–75.
- Taxon
- sugar beet
Beta vulgaris subsp. vulgarise0 - Interactor
- virus yellowse0pathogen
- Outcome
- annual losse0
- Value
- about 5 per cente0
- Qualifier
- From 1970 to 1975e0
- Setting
- Englande0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“From 1970 to 1975, before soil‐applied pesticides were widely used by sugar beet growers in England, virus yellows is estimated to have caused an annual loss representing about 5 per cent of the crop's potential yield”
Claim · model-written summary
The estimated annual virus yellows loss was worth about £4·2 million at the 1974 beet price.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Outcome
- price for beete0
- Value
- about £4·2 millione0
- Qualifier
- at the 1974 price for beete0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“equivalent to about £4·2 million at the 1974 price for beet”
t0“Sugar Beet Crops”
Claim · model-written summary
Growers spent at least £0·9 million annually on insecticides for partial virus yellows control.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Outcome
- spent annually by growers on insecticidese0
- Value
- At least £0·9 millione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At least £0·9 million were spent annually by growers on insecticides to give partial control of yellows”
t0“Sugar Beet Crops”
Claim · model-written summary
Insecticide control probably increased sugar beet yield by a value three times its annual cost.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- insecticidese0
- Outcome
- yielde0
- Direction
- increasee0
- Value
- thrice that sume0
- Qualifier
- probablye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At least £0·9 million were spent annually by growers on insecticides to give partial control of yellows, probably giving a yield increase worth thrice that sum.”
t0“Sugar Beet Crops”
Claim · model-written summary
Sugar beet yields were appreciably lower when at least 20 per cent of plants showed virus yellows symptoms at the end of August.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Interactor
- virus yellowse0pathogen
- Outcome
- crop yieldse0
- Direction
- decreasede0
- Value
- 20 per cent or moree0
- Qualifier
- at the end of Auguste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When 20 per cent or more of sugar beet plants show symptoms of virus yellows at the end of August crop yields are appreciably decreased”
Claim · model-written summary
The share of English sugar beet area with at least 20 per cent symptomatic plants ranged from less than 1 to 86 per cent in 1970–75.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Outcome
- proportion of the national crop areae0
- Value
- less than 1 to 86 per cente0
- Qualifier
- during 1970–75e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the proportion of the national crop area in this category during 1970–75 ranged from less than 1 to 86 per cent (averaging 30 per cent)”
t0“English Sugar Beet Crops”
Claim · model-written summary
The same symptomatic-area share averaged 30 per cent during 1970–75.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Outcome
- proportion of the national crop areae0
- Value
- 30 per cente0
- Qualifier
- during 1970–75e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the proportion of the national crop area in this category during 1970–75 ranged from less than 1 to 86 per cent (averaging 30 per cent)”
t0“English Sugar Beet Crops”
The same questions in other papers
insecticide · yield · Beta vulgaris (beet)Positive and negative results
7 papers in the same direction as this paper · 3 in the opposite direction · 2 reporting no difference from an alternative
- no effect
- no effect
- no effect
9 papers more in this group
See all 13 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.