Abstract
Powdery mildew was observed affecting mature, field-grown, fresh-market tomatoes in southeastern Florida (St. Lucie, Martin, Palm Beach, and Broward counties). Outbreaks were noted in May of 1996 and throughout the spring of 1997. Affected leaves were generally yellow and, in some cases, developed a purplish cast. Whitish areas of fungal growth were often seen in the middle of lesions, but were less prominent than that reported for powdery mildew of field tomato in Hungary (2). Microscopic examination revealed that conidia were produced in chains, contained no fibrosin bodies, and were not dimorphic. Conidial measurements were 33.2 × 15.6 μm, based on 21 samples of five conidia taken from five different fields. These measurements were similar to those for an Erysiphe sp. causing powdery mildew of greenhouse tomato in New York (1). Greenhouse-grown tomato plants, cv. Sunny, in the fourth-true-leaf stage were inoculated with conidia scraped from lesions gathered in commercial fields. A single-edged razor blade was used to transfer the fungus to the adaxial surface of the test plants. Powdery mildew symptoms were observed within 10 days of inoculation. Morphology and size of conidia taken from greenhouse plants were similar to those for original field samples. This is the first report of powdery mildew of field-grown tomato in Florida. References: (1) D. M. Karasevicz and T. A. Zitter. Plant Dis. 80:709, 1996. (2) L. Kiss. Plant Dis. 80:224, 1996.
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Claims 8
Claim · model-written summary
Powdery mildew affected mature field-grown tomatoes in southeastern Florida.
- Taxon
- tomatoes
Solanum lycopersicume0 - Organ / stage
- maturee0
- Outcome
- Powdery mildewe0
- Setting
- southeastern Floridae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Powdery mildew was observed affecting mature, field-grown, fresh-market tomatoes in southeastern Florida”
t0“Powdery Mildew of Field-Grown Tomato in Florida”
Claim · model-written summary
Affected tomato leaves were generally yellow and sometimes purplish.
- Taxon
- TomatoSolanum lycopersicumt0
- Organ / stage
- leavese0
- Outcome
- yellow and, in some cases, developed a purplish caste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Affected leaves were generally yellow and, in some cases, developed a purplish cast”
t0“Powdery Mildew of Field-Grown Tomato in Florida”
Claim · model-written summary
Whitish fungal growth appeared in lesion centers.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- Whitish areas of fungal growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Whitish areas of fungal growth were often seen in the middle of lesions”
t0“Powdery Mildew of Field-Grown Tomato in Florida”
Claim · model-written summary
Conidia occurred in chains and lacked fibrosin bodies and dimorphism.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- conidia were produced in chains, contained no fibrosin bodies, and were not dimorphice0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“conidia were produced in chains, contained no fibrosin bodies, and were not dimorphic”
t0“Powdery Mildew of Field-Grown Tomato in Florida”
Claim · model-written summary
Conidia measured 33.2 × 15.6 μm.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- Conidial measurementse0
- Value
- 33.2 × 15.6 μme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Conidial measurements were 33.2 × 15.6 μm”
t0“Powdery Mildew of Field-Grown Tomato in Florida”
Claim · model-written summary
Inoculated greenhouse tomato developed powdery mildew symptoms within 10 days.
- Taxon
- tomatoSolanum lycopersicume0
- Material
- Sunnye0
- Treatment
- inoculated with conidiae0
- Outcome
- Powdery mildew symptomse0
- Value
- 10 dayse0
- Setting
- Greenhouse-growne0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Greenhouse-grown tomato plants, cv. Sunny, in the fourth-true-leaf stage were inoculated with conidia scraped from lesions gathered in commercial fields. A single-edged razor blade was used to transfer the fungus to the adaxial surface of the test plants. Powdery mildew symptoms were observed within 10 days of inoculation”
t0“Powdery Mildew of Field-Grown Tomato in Florida”
Claim · model-written summary
Conidia from greenhouse plants resembled the original field samples in morphology and size.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- Morphology and size of conidiae0
- Direction
- similare0
- Comparator
- original field samplese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Morphology and size of conidia taken from greenhouse plants were similar to those for original field samples”
t0“Powdery Mildew of Field-Grown Tomato in Florida”
Claim · model-written summary
This was the first report of field-grown tomato powdery mildew in Florida.
- Taxon
- tomatoSolanum lycopersicume0
- Outcome
- first report of powdery mildewe0
- Setting
- Floridae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This is the first report of powdery mildew of field-grown tomato in Florida”
t0“Powdery Mildew of Field-Grown Tomato in Florida”
The same questions in other papers
inoculation · disease · Solanum lycopersicum (tomato)Positive and negative results
129 papers in the same direction as this paper · 136 in the opposite direction
- positive
- positive
- positive
262 papers more in this group
See all 266 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.