Abstract
ABSTRACT Conidial suspensions of Colletotrichum acutatum were prepared in 1:27, 1:45, and 1:81 (wt/vol) dilutions of an extract of strawberry (cv. Tristar) flowers or leaves in water. Strawberry leaves and plastic coverslips were sprayed with the conidial suspensions, incubated at 25 degrees C and continuous wetness for 48 h, and the number of conidia and appressoria were counted. In another experiment, leaves and coverslips were sprayed with a conidial suspension in water, incubated for 72 h to establish C. acutatum populations, and placed in a growth chamber under dry conditions for up to 6 weeks. At each sampling time, leaves and coverslips were sprayed with flower extracts, leaf extracts, or water, incubated for 48 h at 25 degrees C and continuous wetness, and the number of conidia and appressoria were counted. Flower extracts significantly (P </= 0.05) increased the number of conidia on leaves and coverslips compared with water, both when conidia were applied with the extracts and when the extracts were applied to C. acutatum populations exposed to dryness for up to 2 weeks. Application of flower extracts resulted in up to 10- and 16-fold increases in conidia on leaves and coverslips, respectively. Number of conidia increased more when exposed to flower extracts than to leaf extracts. Production of appressoria was not significantly affected by flower or leaf extracts. Our results suggest that inoculum levels of C. acutatum on foliage may increase during flowering of strawberry plants.
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Claims 6
Claim · model-written summary
Flower extracts significantly increased conidia on leaves and coverslips versus water.
- Taxon
- strawberry
_single2.jpg?width=60)
Fragaria ×ananassae0 - Material
- Tristare0
- Treatment
- Flower extractse1
- Outcome
- number of conidiae1
- Direction
- increasede1
- Comparator
- watere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_single2.jpg?width=500)
Verbatim
e0“strawberry (cv. Tristar)”
e1“Flower extracts significantly (P </= 0.05) increased the number of conidia on leaves and coverslips compared with water”
Claim · model-written summary
Flower extract increased conidia on leaves up to tenfold.
- Taxon
- strawberryFragaria ×ananassae0
- Treatment
- flower extractse1
- Outcome
- conidia on leavese1
- Direction
- increasese1
- Value
- 10-e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“strawberry leaves”
e1“Application of flower extracts resulted in up to 10- and 16-fold increases in conidia on leaves and coverslips, respectively”
Claim · model-written summary
Flower extract increased conidia on coverslips up to sixteenfold.
- Taxon
- strawberryFragaria ×ananassae0
- Treatment
- flower extractse1
- Outcome
- conidia on leaves and coverslipse1
- Direction
- increasese1
- Value
- 16-folde1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“strawberry leaves”
e1“Application of flower extracts resulted in up to 10- and 16-fold increases in conidia on leaves and coverslips, respectively”
Claim · model-written summary
Flower extracts increased conidia more than leaf extracts.
- Taxon
- strawberryFragaria ×ananassae0
- Treatment
- flower extractse1
- Outcome
- Number of conidiae1
- Direction
- increased moree1
- Comparator
- leaf extractse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“strawberry leaves”
e1“Number of conidia increased more when exposed to flower extracts than to leaf extracts”
Claim · model-written summary
Flower and leaf extracts did not significantly affect appressoria production.
- Taxon
- strawberryFragaria ×ananassae0
- Treatment
- flower or leaf extractse1
- Outcome
- Production of appressoriae1
- Direction
- not significantly affectede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“strawberry leaves”
e1“Production of appressoria was not significantly affected by flower or leaf extracts”
Claim · model-written summary
Authors suggest pathogen inoculum on foliage may increase during strawberry flowering.
- Taxon
- strawberryFragaria ×ananassae0
- Interactor
- C. acutatum
Colletotrichum acutatume0pathogen - Outcome
- inoculum levels of C. acutatume0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inoculum levels of C. acutatum on foliage may increase during flowering of strawberry plants”
The same questions in other papers
botanical · disease · Fragaria x ananassa (strawberry)Positive and negative results
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