Abstract
S ummary Heart‐rot of sugar beet occurred on experimental plots at Rothamsted during 1935, the severity of the attack decreasing steadily with later sowing, but the effects of spacing of the rows and of treatment with sulphate of ammonia were not significant. Where the number of affected plants per row was high, a higher proportion of affected plants showed severe symptoms. Unaffected sugar beets and others showing slight and severe symptoms of heart‐rot were transplanted to sand cultures and treated with light and heavy dressings of boric acid or with none. In the absence of boric acid the characteristic signs of boron deficiency appeared in the shoots, the apices of the stems and the flower buds blackening and dying. This occurred even when no symptoms were present before transplanting. In the presence of boric acid all plants produced healthy shoots, with no deficiency symptoms. Where heart‐rot was originally present and the main axis killed, a number of healthy, lateral shoots were produced. A certain number of plants failed to survive transplanting, the proportion being greatest with the heavy dose of boric acid, with which one‐half of the plants died. This suggests a possible toxic action of the heavy dose which did not come into play if the plants were constitutionally able to withstand the initial poisoning and start away into growth. The later addition of boron did not improve the condition of the roots of affected plants, as irremediable damage had been done before transplanting. The possibility of producing healthy shoots in the second year from affected roots is important from the point of view of seed production, as considerable loss may be saved by the use of small amounts of boron compounds.
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Claims 9
Claim · model-written summary
Heart-rot severity decreased with later sowing.
- Taxon
- sugar beet
Beta vulgaris subsp. vulgarise0 - Treatment
- later sowinge0
- Outcome
- severity of the attacke0
- Direction
- decreasing steadilye0
- Setting
- Rothamstede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Heart‐rot of sugar beet occurred on experimental plots at Rothamsted during 1935, the severity of the attack decreasing steadily with later sowing”
Claim · model-written summary
Row spacing had no significant effect on heart-rot.
- Taxon
- SUGAR BEETBeta vulgaris subsp. vulgarist0
- Treatment
- spacing of the rowse0
- Outcome
- effectse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects of spacing of the rows and of treatment with sulphate of ammonia were not significant”
t0“SUGAR BEET”
Claim · model-written summary
Sulphate of ammonia had no significant effect on heart-rot.
- Taxon
- SUGAR BEETBeta vulgaris subsp. vulgarist0
- Treatment
- treatment with sulphate of ammoniae0
- Outcome
- effectse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects of spacing of the rows and of treatment with sulphate of ammonia were not significant”
t0“SUGAR BEET”
Claim · model-written summary
Rows with more affected plants had a greater proportion showing severe symptoms.
- Taxon
- SUGAR BEETBeta vulgaris subsp. vulgarist0
- Outcome
- proportion of affected plants showed severe symptomse0
- Direction
- highere0
- Qualifier
- number of affected plants per row was highe0
- Setting
- rowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Where the number of affected plants per row was high, a higher proportion of affected plants showed severe symptoms”
t0“SUGAR BEET”
Claim · model-written summary
Without boric acid, boron deficiency signs appeared in shoots even when absent before transplanting.
- Taxon
- SUGAR BEETBeta vulgaris subsp. vulgarist0
- Organ / stage
- shootse0
- Treatment
- absence of boric acide0
- Outcome
- characteristic signs of boron deficiency appearede0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the absence of boric acid the characteristic signs of boron deficiency appeared in the shoots, the apices of the stems and the flower buds blackening and dying. This occurred even when no symptoms were present before transplanting”
t0“SUGAR BEET”
Claim · model-written summary
With boric acid, all plants made healthy shoots without deficiency symptoms.
- Taxon
- SUGAR BEETBeta vulgaris subsp. vulgarist0
- Treatment
- presence of boric acide0
- Outcome
- healthy shoots, with no deficiency symptomse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the presence of boric acid all plants produced healthy shoots, with no deficiency symptoms”
t0“SUGAR BEET”
Claim · model-written summary
Plants with heart-rot and a killed main axis produced healthy lateral shoots.
- Taxon
- SUGAR BEETBeta vulgaris subsp. vulgarist0
- Outcome
- a number of healthy, lateral shoots were producede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Where heart‐rot was originally present and the main axis killed, a number of healthy, lateral shoots were produced”
t0“SUGAR BEET”
Claim · model-written summary
The heavy boric acid dose had the greatest transplant mortality, killing half the plants.
- Taxon
- SUGAR BEETBeta vulgaris subsp. vulgarist0
- Treatment
- heavy dose of boric acide0
- Outcome
- proportione0
- Direction
- greateste0
- Value
- one‐halfe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the proportion being greatest with the heavy dose of boric acid, with which one‐half of the plants died”
t0“SUGAR BEET”
Claim · model-written summary
Later boron addition did not improve damaged roots.
- Taxon
- SUGAR BEETBeta vulgaris subsp. vulgarist0
- Treatment
- later addition of borone0
- Outcome
- condition of the rootse0
- Direction
- did not improvee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The later addition of boron did not improve the condition of the roots of affected plants”
t0“SUGAR BEET”
The same questions in other papers
boric acid · nutrient: content · Beta vulgaris (beet)Positive and negative results
1 in the opposite direction
- positive
boric acid · disease · Beta vulgaris (beet)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.