Abstract
Field experiments in 1986 and 1987 were designed to determine the effects of striped cucumber beetle (STCB), Acalymma vittatum, larval feeding on watermelon, Citrullus lanatus, roots. Mulched and unmulched seedlings of the watermelon variety 'Crimson Sweet' were artifically infested with 0, 75, or 150 STCB eggs 3, 9, or 3 & 9 days after transplanting (DAT). Mulched plants had significantly greater vine length, 27 and 29 DAT, and melon numbers and weight per plant, than the unmulched plants in both years. Plants which were uninfested had greater vine length and yield parameters than infested plants. Seedlings which were infested soon after transplanting, 3 or 3 & 9 days, also had reduced vine length and yield parameters when compared to uninfested seedlings or those infested 9 DAT. Field investigations were undertaken in 1987 and 1988 to determine the effects of STCB larval feeding on the roots of watermelon varieties. Seedling plant growth and development and harvest yields were measured on five watermelon varieties infested with 0, 75, or 150 STCB eggs 3, 9, or 3 & 9 DAT. Overall, the STCB egg infestations affected the watermelon growth parameters. Vine lengths from uninfested plants and those infested with 75 eggs 9 DAT appeared to withstand the infestations, while those infested soon after transplanting, 3 or 3 & 9 days, suffered delayed growth, and the high egg rate of 150 eggs only increased root damage. Early season varieties appeared to tolerate larval feeding early in the season, but by seasons end, yields were not different from the later maturing varieties. Greenhouse experiments were designed to investigate the effects of STCB larvae on the early growth and development of watermelon varieties. Four watermelon varieties were infested with 0, 37, 75, 150, 225, and 300 eggs per plant 5 DAT. STCB larval feeding damage was assessed by measuring stem length, and stem and root dry weights 16 days after the infestations occurred. In addition, stem length and stem dry weight to root dry weight ratios were calculated. STCB larval damage to watermelon seedlings occurred in significant linear relationships between the egg levels and growth parameters. The parameters showed differences in response below 37, between ca. 40 and 200, and over 225-250 eggs. There were varietal differences in growth due to STCB. Watermelon varieties showed differences in stem lengths at egg levels above 150 eggs, while stem and root dry weight differences occurred above 225 and at 37-38 eggs, respectively.
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 16
Claim · model-written summary
Mulching significantly increased vine length at 27 and 29 days after transplanting relative to unmulched plants.
- Taxon
- watermelon
Citrullus lanatuse0 - Treatment
- Mulchede1
- Outcome
- vine lengthe1
- Direction
- greatere1
- Qualifier
- 27 and 29 DATe1
- Comparator
- unmulched plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“larval feeding on watermelon, Citrullus lanatus, roots”
e1“Mulched plants had significantly greater vine length, 27 and 29 DAT, and melon numbers and weight per plant, than the unmulched plants in both years”
Claim · model-written summary
Mulching significantly increased melon numbers and weight per plant relative to unmulched plants in both years.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- Mulchede1
- Outcome
- melon numbers and weight per plante1
- Direction
- greatere1
- Qualifier
- in both yearse1
- Comparator
- unmulched plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“larval feeding on watermelon, Citrullus lanatus, roots”
e1“Mulched plants had significantly greater vine length, 27 and 29 DAT, and melon numbers and weight per plant, than the unmulched plants in both years”
Claim · model-written summary
Uninfested plants had greater vine length and yield parameters than infested plants.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- infestede2
- Outcome
- vine length and yield parameterse2
- Direction
- greatere2
- Comparator
- uninfestede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“larval feeding on watermelon, Citrullus lanatus, roots”
e2“Plants which were uninfested had greater vine length and yield parameters than infested plants”
Claim · model-written summary
Early infestation at 3 or 3 and 9 days after transplanting reduced vine length and yield parameters compared with uninfested seedlings.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- infested soon after transplanting, 3 or 3 & 9 dayse3
- Outcome
- vine length and yield parameterse3
- Direction
- reducede3
- Comparator
- uninfested seedlingse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“larval feeding on watermelon, Citrullus lanatus, roots”
e3“Seedlings which were infested soon after transplanting, 3 or 3 & 9 days, also had reduced vine length and yield parameters when compared to uninfested seedlings or those infested 9 DAT”
Claim · model-written summary
Early infestation at 3 or 3 and 9 days after transplanting delayed watermelon growth.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- infested soon after transplanting, 3 or 3 & 9 dayse4
- Outcome
- growthe4
- Direction
- delayede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“larval feeding on watermelon, Citrullus lanatus, roots”
e4“while those infested soon after transplanting, 3 or 3 & 9 days, suffered delayed growth, and the high egg rate of 150 eggs only increased root damage”
Claim · model-written summary
The high egg rate of 150 eggs only increased root damage.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- 150 eggse4
- Outcome
- root damagee4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“larval feeding on watermelon, Citrullus lanatus, roots”
e4“while those infested soon after transplanting, 3 or 3 & 9 days, suffered delayed growth, and the high egg rate of 150 eggs only increased root damage”
Claim · model-written summary
Vine lengths of plants infested with 75 eggs 9 days after transplanting appeared to withstand the infestation relative to uninfested plants.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- infested with 75 eggs 9 DATe4
- Outcome
- Vine lengthse4
- Direction
- appeared to withstande4
- Comparator
- uninfested plantse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“larval feeding on watermelon, Citrullus lanatus, roots”
e4“Vine lengths from uninfested plants and those infested with 75 eggs 9 DAT appeared to withstand the infestations, while those infested soon after transplanting, 3 or 3 & 9 days, suffered delayed growth”
Claim · model-written summary
Early season watermelon varieties appeared to tolerate larval feeding early in the season.
- Taxon
- watermelonCitrullus lanatuse0
- Material
- Early season varietiese5
- Treatment
- larval feedinge5
- Outcome
- tolerate larval feedinge5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“larval feeding on watermelon, Citrullus lanatus, roots”
e5“Early season varieties appeared to tolerate larval feeding early in the season, but by seasons end, yields were not different from the later maturing varieties”
Claim · model-written summary
By season end, yields of early season varieties were not different from later maturing varieties.
- Taxon
- watermelonCitrullus lanatuse0
- Material
- Early season varietiese5
- Outcome
- yieldse5
- Direction
- not differente5
- Comparator
- later maturing varietiese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“larval feeding on watermelon, Citrullus lanatus, roots”
e5“Early season varieties appeared to tolerate larval feeding early in the season, but by seasons end, yields were not different from the later maturing varieties”
Claim · model-written summary
STCB larval damage to watermelon seedlings occurred in significant linear relationships between egg levels and growth parameters.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- egg levelse6
- Interactor
- STCBe6pest
- Outcome
- growth parameterse6
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“larval feeding on watermelon, Citrullus lanatus, roots”
e6“STCB larval damage to watermelon seedlings occurred in significant linear relationships between the egg levels and growth parameters”
Claim · model-written summary
The growth parameters showed differences in response at egg levels below 37, between about 40 and 200, and over 225-250 eggs.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- eggse7
- Outcome
- parameterse7
- Direction
- differences in responsee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“larval feeding on watermelon, Citrullus lanatus, roots”
e7“The parameters showed differences in response below 37, between ca. 40 and 200, and over 225-250 eggs”
Claim · model-written summary
There were varietal differences in watermelon growth due to STCB.
- Taxon
- watermelonCitrullus lanatuse0
- Interactor
- STCBe6pest
- Outcome
- growthe6
- Direction
- differencese6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“larval feeding on watermelon, Citrullus lanatus, roots”
e6“There were varietal differences in growth due to STCB”
Claim · model-written summary
Watermelon varieties differed in stem lengths at egg levels above 150 eggs.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- egg levels above 150 eggse7
- Outcome
- stem lengthse7
- Direction
- differencese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“larval feeding on watermelon, Citrullus lanatus, roots”
e7“Watermelon varieties showed differences in stem lengths at egg levels above 150 eggs, while stem and root dry weight differences occurred above 225 and at 37-38 eggs, respectively”
Claim · model-written summary
Stem dry weight differences occurred at egg levels above 225.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- above 225e7
- Outcome
- stem and root dry weighte7
- Direction
- differencese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“larval feeding on watermelon, Citrullus lanatus, roots”
e7“Watermelon varieties showed differences in stem lengths at egg levels above 150 eggs, while stem and root dry weight differences occurred above 225 and at 37-38 eggs, respectively”
Claim · model-written summary
Root dry weight differences occurred at 37-38 eggs.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- 37-38 eggse7
- Outcome
- stem and root dry weighte7
- Direction
- differencese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“larval feeding on watermelon, Citrullus lanatus, roots”
e7“Watermelon varieties showed differences in stem lengths at egg levels above 150 eggs, while stem and root dry weight differences occurred above 225 and at 37-38 eggs, respectively”
Claim · model-written summary
STCB egg infestations affected watermelon growth parameters overall.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- STCB egg infestationse6
- Interactor
- STCBe6pest
- Outcome
- growth parameterse6
- Direction
- affectede6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“larval feeding on watermelon, Citrullus lanatus, roots”
e6“Overall, the STCB egg infestations affected the watermelon growth parameters”
The same questions in other papers
infection · growth · Citrullus lanatus (watermelon)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- negative
transplanting · growth · Citrullus lanatus (watermelon)Positive and negative results
2 papers in the same direction as this paper · 8 in the opposite direction
- positive
- positive
- positive
7 papers more in this group
See all 11 papers →transplanting · yield · Citrullus lanatus (watermelon)Positive and negative results
4 papers in the same direction as this paper · 12 in the opposite direction
- positive
- positive
- positive
13 papers more in this group
See all 17 papers →mulching · growth · Citrullus lanatus (watermelon)Positive and negative results
16 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- no effect
- positive
15 papers more in this group
See all 19 papers →infection · yield · Citrullus lanatus (watermelon)Results agree
1 paper in the same direction as this paper
- 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.