Abstract
ABSTRACT Composts can induce systemic resistance in plants to disease. Unfortunately, the degree of resistance induced seems highly variable and the basis for this effect is not understood. In this work, only 1 of 79 potting mixes prepared with different batches of mature, stabilized composts produced from several different types of solid wastes suppressed the severity of bacterial leaf spot of radish caused by Xanthomonas campestris pv. armoraciae compared with disease on plants produced in a nonamended sphagnum peat mix. An additional batch of compost-amended mix that had been inoculated with Trichoderma hamatum 382 (T(382)), which is known to induce systemic resistance in plants, also suppressed the disease. A total of 11 out of 538 rhizobacterial strains isolated from roots of radish seedlings grown in these two compostamended mixes that suppressed bacterial leaf spot were able to significantly suppress the severity of this disease when used as inoculum in the compost-amended mixes. The most effective strains were identified as Bacillus sp. based on partial sequencing of 16S rDNA. These strains were significantly less effective in reducing the severity of this disease than T(382). A combined inoculum consisting of T(382) and the most effective rhizobacterial Bacillus strain was less effective than T(382) alone. A drench applied to the potting mix with the systemic acquired resistance-inducing chemical acibenzolar-S-methyl was significantly more effective than T(382) in several, but not all tests. We conclude that systemic suppression of foliar diseases induced by compost amendments is a rare phenomenon. Furthermore, inoculation of compost-amended potting mixes with biocontrol agents such as T(382) that induce systemic resistance in plants can significantly increase the frequency of systemic disease control obtained with natural compost amendments.
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 9
Claim · model-written summary
Only 1 of 79 potting mixes prepared from different compost batches suppressed the severity of bacterial leaf spot of radish caused by Xanthomonas campestris pv. armoraciae, compared with a nonamended sphagnum peat mix.
- Taxon
- radish
Raphanus sativuse0 - Treatment
- potting mixes prepared with different batches of mature, stabilized compostse0
- Interactor
- Xanthomonas campestris pv. armoraciae
Xanthomonas campestris pv. armoraciaee0pathogen - Outcome
- severity of bacterial leaf spote0
- Direction
- suppressede0
- Value
- only 1 of 79e0
- Comparator
- nonamended sphagnum peat mixe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“only 1 of 79 potting mixes prepared with different batches of mature, stabilized composts produced from several different types of solid wastes suppressed the severity of bacterial leaf spot of radish caused by Xanthomonas campestris pv. armoraciae compared with disease on plants produced in a nonamended sphagnum peat mix”
Claim · model-written summary
An additional compost-amended mix inoculated with Trichoderma hamatum 382 also suppressed the bacterial leaf spot disease of radish.
- Taxon
- RadishRaphanus sativust0
- Treatment
- compost-amended mix that had been inoculated with Trichoderma hamatum 382e0
- Interactor
- Trichoderma hamatum 382
Trichoderma hamatume0biocontrol_agent - Outcome
- the diseasee0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Radish”
e0“An additional batch of compost-amended mix that had been inoculated with Trichoderma hamatum 382 (T(382)), which is known to induce systemic resistance in plants, also suppressed the disease”
Claim · model-written summary
Eleven of 538 rhizobacterial strains from radish roots significantly suppressed the severity of bacterial leaf spot when used as inoculum in compost-amended mixes.
- Taxon
- radishRaphanus sativuse0
- Treatment
- used as inoculum in the compost-amended mixese0
- Interactor
- rhizobacterial strainse0biocontrol_agent
- Outcome
- severity of this diseasee0
- Direction
- suppresse0
- Value
- 11 out of 538e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A total of 11 out of 538 rhizobacterial strains isolated from roots of radish seedlings grown in these two compostamended mixes that suppressed bacterial leaf spot were able to significantly suppress the severity of this disease when used as inoculum in the compost-amended mixes”
Claim · model-written summary
The most effective strains were identified as Bacillus sp. by partial 16S rDNA sequencing.
Verbatim
e0“The most effective strains were identified as Bacillus sp. based on partial sequencing of 16S rDNA”
Claim · model-written summary
The most effective Bacillus strains were significantly less effective than T(382) in reducing the severity of the disease.
- Taxon
- RadishRaphanus sativust0
- Treatment
- These strainse0
- Outcome
- reducing the severity of this diseasee0
- Direction
- less effectivee0
- Comparator
- T(382)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Radish”
e0“These strains were significantly less effective in reducing the severity of this disease than T(382)”
Claim · model-written summary
A combined inoculum of T(382) and the most effective Bacillus strain was less effective than T(382) alone.
- Taxon
- RadishRaphanus sativust0
- Treatment
- combined inoculum consisting of T(382) and the most effective rhizobacterial Bacillus straine0
- Outcome
- less effectivee0
- Direction
- less effectivee0
- Comparator
- T(382) alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Radish”
e0“A combined inoculum consisting of T(382) and the most effective rhizobacterial Bacillus strain was less effective than T(382) alone”
Claim · model-written summary
A potting-mix drench of acibenzolar-S-methyl was significantly more effective than T(382) in several, but not all, tests.
- Taxon
- RadishRaphanus sativust0
- Treatment
- drench applied to the potting mix with the systemic acquired resistance-inducing chemical acibenzolar-S-methyle0
- Outcome
- more effectivee0
- Direction
- more effectivee0
- Qualifier
- in several, but not all testse0
- Comparator
- T(382)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Radish”
e0“A drench applied to the potting mix with the systemic acquired resistance-inducing chemical acibenzolar-S-methyl was significantly more effective than T(382) in several, but not all tests”
Claim · model-written summary
The authors conclude that systemic suppression of foliar diseases induced by compost amendments is a rare phenomenon.
- Outcome
- systemic suppression of foliar diseases induced by compost amendmentse0
- Qualifier
- rare phenomenone0
Not reportedTaxon
Verbatim
e0“systemic suppression of foliar diseases induced by compost amendments is a rare phenomenon”
Claim · model-written summary
The authors conclude that inoculating compost-amended potting mixes with biocontrol agents such as T(382) can significantly increase the frequency of systemic disease control obtained with natural compost amendments.
- Treatment
- inoculation of compost-amended potting mixes with biocontrol agents such as T(382)e0
- Interactor
- T(382)e0biocontrol_agent
- Outcome
- frequency of systemic disease controle0
- Direction
- increasee0
- Comparator
- natural compost amendmentse0
Not reportedTaxon
Verbatim
e0“inoculation of compost-amended potting mixes with biocontrol agents such as T(382) that induce systemic resistance in plants can significantly increase the frequency of systemic disease control obtained with natural compost amendments”
The same questions in other papers
Trichoderma hamatum · disease · Raphanus sativus (radish)Results agree
1 paper in the same direction as this paper
- positive
inoculation · control · Raphanus sativus (radish)Positive and negative results
1 in the opposite direction
- no effect
fertilization · disease · Raphanus sativus (radish)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
inoculation · disease · Raphanus sativus (radish)Positive and negative results
8 in the opposite direction
- negative
- negative
- no effect
5 papers more in this group
See all 9 papers →fertilization · Xanthomonas campestris pv. armoraciae · Raphanus sativus (radish)Results agree
1 paper in the same direction as this paper
- 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.