Abstract
SUMMARY This investigation deals with an attempt to determine the value of seed tuber disinfection as a method for controlling common scab (Actinomyces scabies (Thaxt.) Güss.) of the potato crop when tubers affected with the disease are used for planting. A résumé is given of previous work by other investigators dealing with the control of this disease. Under Northern Ireland conditions it has been found that a satisfactory control of the disease may be obtained by the disinfection of afEected seed tubers before planting providing that a sufficient interval has elapsed between the growing of successive potato crops in the same land. After a 6‐year interval, which is normal in Northern Ireland farm practice, satisfactory control was obtained in all cases, and it is suggested that a 4‐year interval would probably be sufficient to ensure satisfactory results. Although good control has been obtained after the lapse of shorter intervals, such is not always the case, and the method cannot be relied upon with certainty. No control was obtained where no interval elapsed between the taking of successive potato crops. Solutions of mercuric chloride, formaldehyde, copper sulphate, Burgundy mixture and proprietary organic mercury compounds employed in various ways were used in these experiments. The most satisfactory method for the farmer's use was found to consist of the instantaneous dipping of the tubers in solutions of proprietary organic mercurials. The results obtained indicate that in some cases the planting of very slightly afEected seed in land which has not carried potatoes for many years may result in a high incidence of the disease in the resultant crop. A slight depression in growth was sometimes observed to result from the planting of disinfected tubers, and this was particularly noticeable in the case of the variety Majestic. After a period of from 10 to 12 weeks it disappeared and the crop grew out normally. In some cases tuber disinfection stimulated the growth of the plants. Some of the results obtained suggest an increase in tuber yield due to disinfection of the seed tubers, but the experiments were not laid down in such a way as to permit a statistical analysis of the yields being made.
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Claims 9
Claim · model-written summary
Disinfection of seed tubers may obtain satisfactory control of common scab when a sufficient interval separates successive potato crops.
- Taxon
- potato
Solanum tuberosumt0 - Treatment
- disinfectione1
- Interactor
- ACTINOMYCES SCABIESStreptomyces scabieit1pathogen
- Outcome
- control of the diseasee1
- Qualifier
- providing that a sufficient interval has elapsede2
- Setting
- Northern Ireland conditionse3
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“OF THE POTATO BY TUBER DISINFECTION”
t1“ACTINOMYCES SCABIES (THAXT.)”
e1“a satisfactory control of the disease may be obtained by the disinfection”
e2“providing that a sufficient interval has elapsed between the growing of successive potato crops”
e3“Under Northern Ireland conditions”
Claim · model-written summary
Satisfactory control of scab was obtained in all cases after disinfection.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- disinfectione1
- Outcome
- satisfactory controle2
- Qualifier
- in all casese2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“OF THE POTATO BY TUBER DISINFECTION”
e1“a satisfactory control of the disease may be obtained by the disinfection”
e2“satisfactory control was obtained in all cases”
Claim · model-written summary
A 4-year interval between potato crops would probably be sufficient to ensure satisfactory results.
- Taxon
- potatoSolanum tuberosumt0
- Outcome
- sufficient to ensure satisfactory resultse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“OF THE POTATO BY TUBER DISINFECTION”
e1“would probably be sufficient to ensure satisfactory results”
Claim · model-written summary
Instantaneous dipping of tubers in proprietary organic mercurial solutions was the most satisfactory method for farmers.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- instantaneous dipping of the tubers in solutions of proprietary organic mercurialse1
- Outcome
- most satisfactory methode1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“OF THE POTATO BY TUBER DISINFECTION”
e1“The most satisfactory method for the farmer's use was found to consist of the instantaneous dipping of the tubers in solutions of proprietary organic mercurials”
Claim · model-written summary
Planting very slightly affected seed in land without potatoes for many years may result in a high incidence of scab.
- Taxon
- potatoSolanum tuberosumt0
- Interactor
- ACTINOMYCES SCABIESStreptomyces scabieit1pathogen
- Outcome
- incidence of the diseasee1
- Direction
- highe1
- Setting
- land which has not carried potatoes for many yearse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“OF THE POTATO BY TUBER DISINFECTION”
t1“ACTINOMYCES SCABIES (THAXT.)”
e1“in land which has not carried potatoes for many years may result in a high incidence of the disease in the resultant crop”
Claim · model-written summary
Planting disinfected tubers caused a slight depression in growth, noticeable in the variety Majestic.
- Taxon
- potatoSolanum tuberosumt0
- Material
- Majestice2
- Treatment
- planting of disinfected tuberse1
- Outcome
- growthe1
- Direction
- depressione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“OF THE POTATO BY TUBER DISINFECTION”
e1“A slight depression in growth was sometimes observed to result from the planting of disinfected tubers”
e2“particularly noticeable in the case of the variety Majestic”
Claim · model-written summary
The growth depression disappeared after 10 to 12 weeks and the crop grew out normally.
- Taxon
- potatoSolanum tuberosumt0
- Outcome
- grew out normallye1
- Qualifier
- After a period of from 10 to 12 weekse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“OF THE POTATO BY TUBER DISINFECTION”
e1“After a period of from 10 to 12 weeks it disappeared and the crop grew out normally”
Claim · model-written summary
In some cases tuber disinfection stimulated plant growth.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- tuber disinfectione1
- Outcome
- growth of the plantse1
- Direction
- stimulatede1
- Qualifier
- In some casese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“OF THE POTATO BY TUBER DISINFECTION”
e1“In some cases tuber disinfection stimulated the growth of the plants”
Claim · model-written summary
Disinfection of the seed tubers may increase tuber yield.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- disinfection of the seed tuberse1
- Outcome
- tuber yielde1
- Direction
- increasee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“OF THE POTATO BY TUBER DISINFECTION”
e1“Some of the results obtained suggest an increase in tuber yield due to disinfection of the seed tubers”