Abstract
SUMMARY Routine protective spray application to commercial Majestic potato crops on two farms in south‐east Scotland for 9 and 10 years respectively gave highly significant average increases in total yield of 1.2 and 2.1 tons per acre (3.0 and 5.3 tonnes per ha) respectively in rows not affected by tractor wheels. In 6 and 7 years respectively the increases were more than 1 ton per acre. These increases were composed almost entirely of ware tubers. There was no average difference in yield whether the first spray application was made when the haulm closed in the rows or after the first general forecast based on the Beaumont period was announced. The average total yield reduction in the four rows affected by tractor wheels tended to offset the benefit given by spray application, and, where an eight‐row spray boom was employed, halved the potential overall yield increase. Reduction was again confined to the ware fraction. Similar experiments with cv. King Edward over a shorter period in eastern Scotland generally showed little consistent effect on yield, possibly partly because of the late appearance of blight in some of these crops. Considerable yield gains were obtained in Majestic crops even when the disease first appeared in mid‐August in some seasons which could not be classified as ‘blight years’. Over the 10 years of the investigation, there were 5 blight years as defined by Large (1959) compared with the 1 in 10 which Large mentioned for the north of England. Spread of blight from local sources, such as discard heaps outside the crop and before the occurrence of the field epidemic phase, was found to interfere with adequate timing of spray applications and with the effectiveness of the general forecast based on the Beaumont period. Infection of Majestic tubers was generally low but at one Majestic site and in the King Edward series the overall average tuber infection was significantly decreased by spraying. Tuber blight was shown to vary inversely with the size of tubers of Majestic as well as of King Edward.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 17
Claim · model-written summary
Routine protective spray application increased total yield of Majestic potato by 1.2 tons per acre.
- Taxon
- potato
Solanum tuberosume0 - Material
- Majestice0
- Treatment
- Routine protective spray applicatione0
- Outcome
- total yielde1
- Direction
- increasese1
- Value
- 1.2e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Routine protective spray application to commercial Majestic potato crops on two farms”
e1“gave highly significant average increases in total yield of 1.2 and 2.1 tons per acre (3.0 and 5.3 tonnes per ha) respectively in rows not affected by tractor wheels”
Claim · model-written summary
Routine protective spray application increased total yield of Majestic potato by 2.1 tons per acre at the second farm.
- Taxon
- potatoSolanum tuberosume0
- Material
- Majestice0
- Treatment
- Routine protective spray applicatione0
- Outcome
- total yielde1
- Direction
- increasese1
- Value
- 2.1 tons per acree1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Routine protective spray application to commercial Majestic potato crops on two farms”
e1“gave highly significant average increases in total yield of 1.2 and 2.1 tons per acre (3.0 and 5.3 tonnes per ha) respectively in rows not affected by tractor wheels”
Claim · model-written summary
Yield increases from spraying exceeded 1 ton per acre in 6 and 7 years.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- Routine protective spray applicatione0
- Outcome
- increasese1
- Direction
- increasese1
- Value
- 1 ton per acree1
- Qualifier
- more thane1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Routine protective spray application to commercial Majestic potato crops on two farms”
e1“In 6 and 7 years respectively the increases were more than 1 ton per acre”
Claim · model-written summary
The yield increases from spraying were composed almost entirely of ware tubers.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- Routine protective spray applicatione0
- Outcome
- ware tuberse2
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Routine protective spray application to commercial Majestic potato crops on two farms”
e2“These increases were composed almost entirely of ware tubers”
Claim · model-written summary
There was no average yield difference whether the first spray was applied when the haulm closed in the rows or after the first general forecast.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- first spray application was made when the haulm closed in the rowse3
- Outcome
- yielde3
- Direction
- no average differencee3
- Comparator
- after the first general forecast based on the Beaumont period was announcede3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Routine protective spray application to commercial Majestic potato crops on two farms”
e3“There was no average difference in yield whether the first spray application was made when the haulm closed in the rows or after the first general forecast based on the Beaumont period was announced”
Claim · model-written summary
The total yield reduction in rows affected by tractor wheels tended to offset the benefit of spray application.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- spray applicatione4
- Outcome
- average total yield reductione4
- Direction
- reductione4
- Qualifier
- in the four rows affected by tractor wheelse4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Routine protective spray application to commercial Majestic potato crops on two farms”
e4“The average total yield reduction in the four rows affected by tractor wheels tended to offset the benefit given by spray application”
Claim · model-written summary
With an eight-row spray boom, tractor wheel effects halved the potential overall yield increase.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- spray boom was employede5
- Outcome
- potential overall yield increasee5
- Direction
- halvede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Routine protective spray application to commercial Majestic potato crops on two farms”
e5“where an eight‐row spray boom was employed, halved the potential overall yield increase”
Claim · model-written summary
The yield reduction from tractor wheels was confined to the ware fraction.
- Taxon
- potatoSolanum tuberosume0
- Outcome
- Reductione6
- Qualifier
- confined to the ware fractione6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Routine protective spray application to commercial Majestic potato crops on two farms”
e6“Reduction was again confined to the ware fraction”
Claim · model-written summary
Spraying of King Edward potato over a shorter period in eastern Scotland generally had little consistent effect on yield.
- Taxon
- potatoSolanum tuberosume0
- Material
- King Edwarde7
- Outcome
- yielde7
- Qualifier
- little consistent effecte7
- Setting
- eastern Scotlande7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Routine protective spray application to commercial Majestic potato crops on two farms”
e7“Similar experiments with cv. King Edward over a shorter period in eastern Scotland generally showed little consistent effect on yield”
Claim · model-written summary
Considerable yield gains were obtained in Majestic potato even when blight first appeared in mid-August in some seasons.
- Taxon
- potatoSolanum tuberosume0
- Material
- Majestice2
- Outcome
- yield gainse2
- Qualifier
- even when the disease first appearede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Routine protective spray application to commercial Majestic potato crops on two farms”
e2“Considerable yield gains were obtained in Majestic crops even when the disease first appeared”
Claim · model-written summary
Over 10 years there were 5 blight years, compared with 1 in 10 years for the north of England.
- Taxon
- potatoSolanum tuberosume0
- Outcome
- blight yearse2
- Value
- 5 blight yearse2
- Qualifier
- compared with the 1 in 10 which Large mentioned for the north of Englande2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Routine protective spray application to commercial Majestic potato crops on two farms”
e2“Over the 10 years of the investigation, there were 5 blight years as defined by Large (1959) compared with the 1 in 10 which Large mentioned for the north of England”
Claim · model-written summary
Spread of blight from local sources interfered with the timing of spray applications and with the effectiveness of the general forecast.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- spray applicationse2
- Outcome
- timing of spray applicationse2
- Direction
- interferee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Routine protective spray application to commercial Majestic potato crops on two farms”
e2“Spread of blight from local sources, such as discard heaps outside the crop and before the occurrence of the field epidemic phase, was found to interfere with adequate timing of spray applications and with the effectiveness of the general forecast based on the Beaumont period”
Claim · model-written summary
Infection of Majestic tubers was generally low.
- Taxon
- potatoSolanum tuberosume0
- Material
- Majestice2
- Organ / stage
- tuberse2
- Outcome
- Infectione2
- Qualifier
- generally lowe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Routine protective spray application to commercial Majestic potato crops on two farms”
e2“Infection of Majestic tubers was generally low”
Claim · model-written summary
Spraying significantly decreased overall average tuber infection at one Majestic site.
- Taxon
- potatoSolanum tuberosume0
- Material
- Majestice2
- Treatment
- sprayinge2
- Outcome
- overall average tuber infectione2
- Direction
- decreasede2
- Setting
- one Majestic sitee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Routine protective spray application to commercial Majestic potato crops on two farms”
e2“at one Majestic site and in the King Edward series the overall average tuber infection was significantly decreased by spraying”
Claim · model-written summary
Spraying significantly decreased overall average tuber infection in the King Edward series.
- Taxon
- potatoSolanum tuberosume0
- Material
- King Edward seriese2
- Treatment
- sprayinge2
- Outcome
- overall average tuber infectione2
- Direction
- decreasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Routine protective spray application to commercial Majestic potato crops on two farms”
e2“at one Majestic site and in the King Edward series the overall average tuber infection was significantly decreased by spraying”
Claim · model-written summary
Tuber blight varied inversely with tuber size in Majestic potato.
- Taxon
- potatoSolanum tuberosume0
- Material
- Majestice2
- Organ / stage
- tuberse2
- Outcome
- Tuber blighte2
- Direction
- vary inverselye2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Routine protective spray application to commercial Majestic potato crops on two farms”
e2“Tuber blight was shown to vary inversely with the size of tubers of Majestic as well as of King Edward”
Claim · model-written summary
Tuber blight varied inversely with tuber size in King Edward potato.
- Taxon
- potatoSolanum tuberosume0
- Material
- King Edwarde2
- Organ / stage
- tuberse2
- Outcome
- Tuber blighte2
- Direction
- vary inverselye2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Routine protective spray application to commercial Majestic potato crops on two farms”
e2“Tuber blight was shown to vary inversely with the size of tubers of Majestic as well as of King Edward”
The same questions in other papers
application · yield · Solanum tuberosum (potato)Positive and negative results
176 papers in the same direction as this paper · 14 in the opposite direction
- no effect
- no effect
- negative
187 papers more in this group
See all 191 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.