Abstract
Angular leaf spot disease caused by Pseudomonas syringae pv. lachrymans is worldwide bacterial disease of cucumber. The present study was undertaken to control the disease by using some copper compounds such as copper hydroxide, copper oxychloride, copper sulphate and cuprous oxide, as well as some bactericides such as Beltanol-L (Qchinosol), Starnar 20% (Oxolinic acid) and Streptorol 21.3% (Streptomycin sulphate). Different concentrations of chemicals and bactericides were applied in vitro and in vivo to study their effect on the growth of P.lachrymans and reducing the disease in greenhouse. The inhibitory effect was determined as a minimum inhibitory concentration (MIC) and by using the disc diffusion method. The results revealed that chemicals and bactericides were differed in their effect on the bacterium. However, the bactericides effect were more effective than the copper compounds in reducing the bacterial growth. Starner 20% showed the largest inhibition zone (18mm) followed by streptorol 21.3% (14mm), while beltanol-L showed the lowest effect (13mm), with respect of copper compounds, cuprous oxide, showed largest inhibitory effect, followed by copper hydroxide and copper oxychloride respectively, while copper sulphate showed no effect on the bacterial growth. In greenhouse experiments, all chemicals used significantly reduced the disease incidence comparing with the control treatment. Starner 20% was the most effective followed by beltanol-L, copper hydroxide, streptorol 21.3% or copper oxychloride and cuprous oxide. While copper sulphate was the least effective compound in controlling the disease.
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Claims 11
Claim · model-written summary
Bactericides suppressed bacterial growth more than copper compounds.
- Taxon
- CUCUMBER
Cucumis sativust0 - Treatment
- bactericidese0
- Outcome
- bacterial growthe0
- Direction
- reducinge0
- Comparator
- copper compoundse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the bactericides effect were more effective than the copper compounds in reducing the bacterial growth”
t0“CUCUMBER”
Claim · model-written summary
Starner 20% produced the largest inhibition zone, 18mm.
- Taxon
- CUCUMBERCucumis sativust0
- Treatment
- Starner 20%e0
- Outcome
- largest inhibition zonee0
- Direction
- largeste0
- Value
- 18mme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Starner 20% showed the largest inhibition zone (18mm)”
t0“CUCUMBER”
Claim · model-written summary
Streptorol 21.3% produced a 14mm inhibition zone.
- Taxon
- CUCUMBERCucumis sativust0
- Treatment
- streptorol 21.3%e0
- Outcome
- streptorol 21.3%e0
- Value
- 14mme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“followed by streptorol 21.3% (14mm)”
t0“CUCUMBER”
Claim · model-written summary
Beltanol-L had the lowest inhibition, 13mm.
- Taxon
- CUCUMBERCucumis sativust0
- Treatment
- beltanol-Le0
- Outcome
- lowest effecte0
- Direction
- loweste0
- Value
- 13mme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“beltanol-L showed the lowest effect (13mm)”
t0“CUCUMBER”
Claim · model-written summary
Cuprous oxide had the largest inhibitory effect among copper compounds.
- Taxon
- CUCUMBERCucumis sativust0
- Treatment
- cuprous oxidee0
- Outcome
- largest inhibitory effecte0
- Direction
- largeste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cuprous oxide, showed largest inhibitory effect”
t0“CUCUMBER”
Claim · model-written summary
Copper hydroxide ranked after cuprous oxide in inhibition.
- Taxon
- CUCUMBERCucumis sativust0
- Treatment
- copper hydroxidee0
- Outcome
- followed by copper hydroxidee0
- Direction
- followed bye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“followed by copper hydroxide and copper oxychloride respectively”
t0“CUCUMBER”
Claim · model-written summary
Copper oxychloride ranked after copper hydroxide in inhibition.
- Taxon
- CUCUMBERCucumis sativust0
- Treatment
- copper oxychloridee0
- Outcome
- copper oxychloridee0
- Direction
- followed bye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“followed by copper hydroxide and copper oxychloride respectively”
t0“CUCUMBER”
Claim · model-written summary
Copper sulphate did not inhibit bacterial growth.
- Taxon
- CUCUMBERCucumis sativust0
- Treatment
- copper sulphatee0
- Outcome
- bacterial growthe0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“copper sulphate showed no effect on the bacterial growth”
t0“CUCUMBER”
Claim · model-written summary
All tested chemicals significantly reduced greenhouse disease incidence versus control.
- Taxon
- CUCUMBERCucumis sativust0
- Treatment
- all chemicals usede0
- Outcome
- disease incidencee0
- Direction
- reducede0
- Comparator
- control treatmente0
- Setting
- greenhouse experimentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In greenhouse experiments, all chemicals used significantly reduced the disease incidence comparing with the control treatment”
t0“CUCUMBER”
Claim · model-written summary
Starner 20% was most effective against greenhouse disease.
- Taxon
- CUCUMBERCucumis sativust0
- Treatment
- Starner 20%e0
- Outcome
- most effectivee0
- Direction
- most effectivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Starner 20% was the most effective”
t0“CUCUMBER”
Claim · model-written summary
Copper sulphate was least effective against disease.
- Taxon
- CUCUMBERCucumis sativust0
- Treatment
- copper sulphatee0
- Outcome
- least effective compound in controlling the diseasee0
- Direction
- least effectivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“copper sulphate was the least effective compound in controlling the disease”
t0“CUCUMBER”
The same questions in other papers
copper atom · disease · Cucumis sativus (cucumber)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
insecticide · disease · Cucumis sativus (cucumber)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
See all 5 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.