Abstract
Verticillium wilt is one of the most destructive diseases of eggplant ( Solanum melongena L.). Some researchers have reported that wilt was encouraged by sufficient soil humidity, while others stated that it was encouraged by drought. This study investigated the water stress effect on the severity of Verticillium wilt on eggplant, as it is reflected on yield, agronomic traits and fruit quality. Thus, eggplant seedlings cv. ‘Tsakoniki’ were transplanted in three rows, each with 20 plants, during the summer of 1995 and 1996 in a plastic greenhouse, at the Agricultural Research Center of Macedonia and Thrace. Ten of the plants in each row were inoculated with the fungus Verticillium dahliae , while the other 10 were used as controls. Rows were irrigated every 2, 4 or 6 days. Soil humidity was calculated before every irrigation in each row. The disease severity was estimated by the disease index (DI) as the combination product of leaf symptom index (LSI) and vascular discoloration index (VDI). In addition, the plant height, early and total commercial yields, fruit numbers of early and total commercial yields, plant weight, the above‐ground plant weight, root weight, pH, total soluble solids and fruit brilliance plus colour intensity were measured. The effect of Verticillium wilt on plants irrigated every 2, 4 or 6 days was estimated by the correlation coefficient ( r ) between LSI and DI and the aforementioned characteristics. Verticillium wilt had a significant but negative effect on all of the measured or calculated characteristics. This effect, however, was independent of the irrigation applied. On average, the early commercial yield was reduced by 40.8% and the final commercial yield by 39.4%. The only quality characteristic that was affected significantly by irrigation was the fruit brilliance and colour intensity ( r =−0.640 to − 0.727, P ≤ 0.01). Finally, the irrigation frequency (every 2, 4 or 6 days) had a significant but negative effect on all of the characteristics measured on the control plants. The only exception was fruit quality. In conclusion, the combined effect of irrigation and Verticillium wilt infection significantly reduced the early and total production of eggplant and spoiled the fruit quality.
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Claims 8
Claim · model-written summary
Verticillium dahliae inoculation had a significant negative effect on all measured or calculated eggplant characteristics compared with uninoculated controls.
- Taxon
- eggplant
Solanum melongenae1 - Treatment
- inoculated with the fungus Verticillium dahliaee2
- Interactor
- Verticillium dahliae
Verticillium dahliaee2pathogen - Outcome
- measured or calculated characteristicse3
- Direction
- decreaseinferrede3
- Comparator
- controlse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Verticillium wilt is one of the most destructive diseases of eggplant”
e2“Ten of the plants in each row were inoculated with the fungus Verticillium dahliae , while the other 10 were used as controls”
e3“Verticillium wilt had a significant but negative effect on all of the measured or calculated characteristics”
Claim · model-written summary
Verticillium wilt reduced early commercial eggplant yield by 40.8%.
- Taxon
- eggplantSolanum melongenae1
- Treatment
- Verticillium wilte3
- Outcome
- early commercial yielde5
- Direction
- reducede5
- Value
- 40.8%e5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Verticillium wilt is one of the most destructive diseases of eggplant”
e3“Verticillium wilt had a significant but negative effect on all of the measured or calculated characteristics”
e5“On average, the early commercial yield was reduced by 40.8% and the final commercial yield by 39.4%”
Claim · model-written summary
Verticillium wilt reduced final commercial eggplant yield by 39.4%.
- Taxon
- eggplantSolanum melongenae1
- Treatment
- Verticillium wilte3
- Outcome
- final commercial yielde5
- Direction
- reducede5
- Value
- 39.4%e5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Verticillium wilt is one of the most destructive diseases of eggplant”
e3“Verticillium wilt had a significant but negative effect on all of the measured or calculated characteristics”
e5“On average, the early commercial yield was reduced by 40.8% and the final commercial yield by 39.4%”
Claim · model-written summary
The effect of Verticillium wilt on eggplant was independent of the irrigation applied.
- Taxon
- eggplantSolanum melongenae1
- Treatment
- irrigatione4
- Outcome
- effecte4
- Direction
- no_changeinferrede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Verticillium wilt is one of the most destructive diseases of eggplant”
e4“This effect, however, was independent of the irrigation applied”
Claim · model-written summary
Irrigation was the only factor significantly affecting eggplant fruit brilliance and colour intensity (r = -0.640 to -0.727, P ≤ 0.01).
- Taxon
- eggplantSolanum melongenae1
- Treatment
- irrigatione6
- Outcome
- fruit brilliance and colour intensitye6
- Value
- r =−0.640 to − 0.727e6
- Qualifier
- P ≤ 0.01e6
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Verticillium wilt is one of the most destructive diseases of eggplant”
e6“The only quality characteristic that was affected significantly by irrigation was the fruit brilliance and colour intensity (r =−0.640 to − 0.727, P ≤ 0.01)”
Claim · model-written summary
Higher irrigation frequency (every 2, 4 or 6 days) decreased all characteristics measured on the uninfected control eggplants, except fruit quality.
- Taxon
- eggplantSolanum melongenae1
- Treatment
- irrigation frequencye7
- Outcome
- characteristics measured on the control plantse7
- Direction
- decreaseinferrede7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Verticillium wilt is one of the most destructive diseases of eggplant”
e7“the irrigation frequency (every 2, 4 or 6 days) had a significant but negative effect on all of the characteristics measured on the control plants”
Claim · model-written summary
The combined effect of irrigation and Verticillium wilt significantly reduced early and total eggplant production.
- Taxon
- eggplantSolanum melongenae1
- Treatment
- combined effect of irrigation and Verticillium wilt infectione1
- Outcome
- early and total productione1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the combined effect of irrigation and Verticillium wilt infection significantly reduced the early and total production of eggplant”
Claim · model-written summary
The combined effect of irrigation and Verticillium wilt spoiled eggplant fruit quality.
- Taxon
- eggplantSolanum melongenae1
- Treatment
- combined effect of irrigation and Verticillium wilt infectione1
- Outcome
- fruit qualitye2
- Direction
- spoilede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the combined effect of irrigation and Verticillium wilt infection significantly reduced the early and total production of eggplant”
e2“spoiled the fruit quality”
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See all 48 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.