Abstract
During June and July of 2007, powdery mildew-infected tomato (Lycopersicum esculentum Mill. cv. Reserve) plants were observed in a commercial greenhouse with an open hydroponic system in Morelia County. Disease incidence increased from 0.5% to more than 90% in 1 month. Infected plants showed leaves with irregular areas of dense, white mycelium covering most of the upper surface. Microscopic analysis showed hyaline, septate hyphae with lobed appressoria. Conidia were ellipsoid to ovoid and 30 to 45 (38) μm × 15 to 20 (16) μm. Conidiophores were erect, 80 to 120 (103) μm, consisted of a foot cell 42 to 67 (56) μm, and two to three short cells. Conidia were produced singly. On the basis of the observed morphological characteristics, the fungus was identified as Oidium neolycopersici L. Kiss (1). Pathogenicity tests were conducted on fourth true-leaf tomato seedlings cv. Reserve under greenhouse conditions (22 ± 5°C). Inoculation was performed by transferring conidia from infected leaves to the leaves of uninfected tomato seedlings with a single-edged razor blade. Powdery mildew symptoms began to develop 7 days after inoculation. Symptoms and morphological characteristics were similar to those observed in the commercial greenhouse. Noninoculated plants remained healthy throughout the experiments. To our knowledge, this is the first report of O. neolycopersici causing powdery mildew on tomato in Michoacan, Mexico. This disease has been reported from Canada, Europe, Japan, the United States (2), and Venezuela (3) on greenhouse and field tomato crops. The observed high incidence and severe infection indicates that this disease may become an important problem in greenhouse tomatoes in Mexico. References: (1) L. Kiss et al. Mycol. Res. 105:684, 2001. (2) L. Kiss et al. Plant Dis. 89:491, 2005. (3) J. O. Montilla et al. Plant Dis. 91:910, 2007.
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 4
Claim · model-written summary
Powdery mildew incidence on greenhouse tomato rose from 0.5% to more than 90% within a month.
- Taxon
- tomato
Solanum lycopersicume1 - Interactor
- Oidium neolycopersiciErysiphe neolycopersicit0pathogen
- Outcome
- Disease incidencee0
- Direction
- increasede0
- Value
- more than 90%e0
- Qualifier
- 0.5%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Disease incidence increased from 0.5% to more than 90% in 1 month.”
e1“tomato (Lycopersicum esculentum Mill. cv. Reserve)”
t0“Oidium neolycopersici”
Claim · model-written summary
The powdery mildew fungus on tomato was identified as Oidium neolycopersici from morphology.
- Taxon
- TomatoesSolanum lycopersicumt0
- Interactor
- Oidium neolycopersiciErysiphe neolycopersicie0pathogen
- Outcome
- identified as Oidium neolycopersicie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the fungus was identified as Oidium neolycopersici L. Kiss”
t0“Tomatoes”
Claim · model-written summary
Inoculated tomato seedlings developed powdery mildew symptoms after 7 days, whereas noninoculated plants stayed healthy.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- inoculatione0
- Interactor
- Oidium neolycopersiciErysiphe neolycopersicit0pathogen
- Outcome
- Powdery mildew symptomse0
- Value
- 7 dayse0
- Comparator
- Noninoculated plantse2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Powdery mildew symptoms began to develop 7 days after inoculation.”
e1“tomato seedlings cv. Reserve”
e2“Noninoculated plants remained healthy throughout the experiments.”
t0“Oidium neolycopersici”
Claim · model-written summary
This is the first reported O. neolycopersici powdery mildew on tomato in Michoacan, Mexico.
- Taxon
- tomatoSolanum lycopersicume0
- Interactor
- O. neolycopersiciErysiphe neolycopersicie0pathogen
- Outcome
- powdery mildewe0
- Setting
- Michoacan, Mexicoe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this is the first report of O. neolycopersici causing powdery mildew on tomato in Michoacan, Mexico.”
The same questions in other papers
inoculation · Erysiphe neolycopersici · Solanum lycopersicum (tomato)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- negative
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.