Abstract
Jatropha curcas is an important bio-fuel tree in the hot-dry river valleys of southwestern China.Powdery mildew on J.curcas happens quite often,parasitizes on its stems,branches,leaf,flowers and fruits,decreases its photosynthesis and growth potential and affects its fruit setting.Examination by microscope in the lab and systematic observation in the field show that the pathogenic fungus of powdery mildew on Jatropha curcas L.in Yuanmou dry-hot valleys is Oidium monilioides Nees,belonging to Deuteromycotina;that the developing trend of powdery mildew shows a single-peak curve and temperature and humidity are the main climate factors influencing the occurrence and development of the disease;that environment factors as geographical position and planting ways also play an important role in the occurrence of the disease;and that the resistance of J.curcas itself is the most direct factor to hinder its occurrence.Four highly effective and lowly toxic fungicides were used in plot trials and the results show that all of them are effective to the control of powdery mildew and among them,the best effective is 70% of methyl Topsin with 400～1000 times of water and the controlling effect reaches from 88.15% to 96.92%;that the next effective is 5% of Yunda cuili with 1000～2000 times of water,the controlling effect changing from 76.56%～81.38%;and that the last effective is the other two fungicides: 50% of daconil with 200～600 times of water and 15% of triadimefon with 500～1000 times of water,the controlling effects being between 64.00%~77.27%.The controlling effect of low concentration chemicals can be strengthened obviously by increasing spraying time.Based on this rule,we can get good effects through increasing spraying time for low concentration fungicides,which can delay the resistance of powdery mildew to fungicides.In the end,the author provides some integrated management methods for the control of powdery mildew on J.curcas.
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Claims 15
Claim · model-written summary
Powdery mildew affects Jatropha stems, branches, leaves, flowers, and fruits.
- Taxon
- J.curcas
_tree_at_Samedha.jpg?width=60)
Jatropha curcase0 - Interactor
- Powdery mildewe0pathogen
- Outcome
- parasitizes on its stems,branches,leaf,flowers and fruitse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_tree_at_Samedha.jpg?width=500)
Verbatim
e0“Powdery mildew on J.curcas happens quite often,parasitizes on its stems,branches,leaf,flowers and fruits”
Claim · model-written summary
Powdery mildew decreases Jatropha photosynthesis and growth potential.
- Taxon
- Jatropha curcasJatropha curcast0
- Interactor
- Powdery Mildewt0pathogen
- Outcome
- photosynthesis and growth potentiale0
- Direction
- decreasese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreases its photosynthesis and growth potential”
t0“Powdery Mildew on Jatropha curcas”
Claim · model-written summary
Powdery mildew affects Jatropha fruit setting.
- Taxon
- Jatropha curcasJatropha curcast0
- Interactor
- Powdery Mildewt0pathogen
- Outcome
- fruit settinge0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“affects its fruit setting”
t0“Powdery Mildew on Jatropha curcas”
Claim · model-written summary
Oidium monilioides was identified as the Jatropha powdery mildew pathogen in Yuanmou.
- Taxon
- Jatropha curcas L.Jatropha curcase0
- Interactor
- Oidium monilioides Neese0pathogen
- Outcome
- pathogenic fungus of powdery mildewe0
- Setting
- Yuanmou dry-hot valleyse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the pathogenic fungus of powdery mildew on Jatropha curcas L.in Yuanmou dry-hot valleys is Oidium monilioides Nees”
Claim · model-written summary
Powdery mildew development followed a single-peak curve.
- Taxon
- Jatropha curcasJatropha curcast0
- Interactor
- powdery mildewe0pathogen
- Outcome
- developing trend of powdery mildew shows a single-peak curvee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the developing trend of powdery mildew shows a single-peak curve”
t0“Jatropha curcas”
Claim · model-written summary
Temperature and humidity influenced powdery mildew occurrence and development.
- Taxon
- Jatropha curcasJatropha curcast0
- Interactor
- Powdery Mildewt0pathogen
- Outcome
- occurrence and development of the diseasee0
- Qualifier
- temperature and humiditye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“temperature and humidity are the main climate factors influencing the occurrence and development of the disease”
t0“Powdery Mildew on Jatropha curcas”
Claim · model-written summary
Geographical position and planting methods influenced powdery mildew occurrence.
- Taxon
- Jatropha curcasJatropha curcast0
- Interactor
- Powdery Mildewt0pathogen
- Outcome
- occurrence of the diseasee0
- Qualifier
- planting wayse0
- Setting
- geographical positione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“geographical position and planting ways also play an important role in the occurrence of the disease”
t0“Powdery Mildew on Jatropha curcas”
Claim · model-written summary
Jatropha resistance hindered mildew occurrence.
- Taxon
- J.curcasJatropha curcase0
- Material
- J.curcase0
- Interactor
- Powdery Mildewt0pathogen
- Outcome
- occurrencee0
- Direction
- hindere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the resistance of J.curcas itself is the most direct factor to hinder its occurrence”
t0“Powdery Mildew on Jatropha curcas”
Claim · model-written summary
All four tested fungicides controlled powdery mildew.
- Taxon
- Jatropha curcasJatropha curcast0
- Treatment
- Four highly effective and lowly toxic fungicidese0
- Interactor
- powdery mildewe0pathogen
- Outcome
- control of powdery mildewe0
- Direction
- effectivee0
- Setting
- plot trialse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Four highly effective and lowly toxic fungicides were used in plot trials and the results show that all of them are effective to the control of powdery mildew”
t0“Jatropha curcas”
Claim · model-written summary
Methyl Topsin gave the best control, 88.15% to 96.92%.
- Taxon
- Jatropha curcasJatropha curcast0
- Treatment
- 70% of methyl Topsin with 400～1000 times of watere0
- Interactor
- Powdery Mildewt0pathogen
- Outcome
- controlling effecte0
- Direction
- best effectivee0
- Value
- 88.15% to 96.92%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the best effective is 70% of methyl Topsin with 400～1000 times of water and the controlling effect reaches from 88.15% to 96.92%”
t0“Powdery Mildew on Jatropha curcas”
Claim · model-written summary
Yunda cuili controlled mildew by 76.56% to 81.38%.
- Taxon
- Jatropha curcasJatropha curcast0
- Treatment
- 5% of Yunda cuili with 1000～2000 times of watere0
- Interactor
- Powdery Mildewt0pathogen
- Outcome
- controlling effecte0
- Direction
- next effectivee0
- Value
- 76.56%～81.38%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the next effective is 5% of Yunda cuili with 1000～2000 times of water,the controlling effect changing from 76.56%～81.38%”
t0“Powdery Mildew on Jatropha curcas”
Claim · model-written summary
Daconil controlled mildew within the reported 64.00% to 77.27% range.
- Taxon
- Jatropha curcasJatropha curcast0
- Treatment
- 50% of daconil with 200～600 times of watere0
- Interactor
- Powdery Mildewt0pathogen
- Outcome
- controlling effectse0
- Value
- 64.00%~77.27%e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“50% of daconil with 200～600 times of water and 15% of triadimefon with 500～1000 times of water,the controlling effects being between 64.00%~77.27%”
t0“Powdery Mildew on Jatropha curcas”
Claim · model-written summary
Triadimefon controlled mildew within the reported 64.00% to 77.27% range.
- Taxon
- Jatropha curcasJatropha curcast0
- Treatment
- 15% of triadimefon with 500～1000 times of watere0
- Interactor
- Powdery Mildewt0pathogen
- Outcome
- controlling effectse0
- Value
- 64.00%~77.27%e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“15% of triadimefon with 500～1000 times of water,the controlling effects being between 64.00%~77.27%”
t0“Powdery Mildew on Jatropha curcas”
Claim · model-written summary
More frequent spraying strengthened control by low-concentration chemicals.
- Taxon
- Jatropha curcasJatropha curcast0
- Treatment
- increasing spraying timee0
- Interactor
- Powdery Mildewt0pathogen
- Outcome
- controlling effect of low concentration chemicalse0
- Direction
- strengthenede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The controlling effect of low concentration chemicals can be strengthened obviously by increasing spraying time”
t0“Powdery Mildew on Jatropha curcas”
Claim · model-written summary
The authors recommend increasing spraying for dilute fungicides to maintain control and delay resistance.
- Taxon
- Jatropha curcasJatropha curcast0
- Interactor
- powdery mildewe0pathogen
- Outcome
- increasing spraying time for low concentration fungicidese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we can get good effects through increasing spraying time for low concentration fungicides,which can delay the resistance of powdery mildew to fungicides”
t0“Jatropha curcas”
The same questions in other papers
application · molecular: metabolites · Jatropha curcasResults agree
2 papers in the same direction as this paper
- positive
- positive
fungicide · disease · Jatropha curcasResults agree
3 papers in the same direction as this paper
- positive
- 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.