Paper · 1990 · Journal of Economic Entomology

Response of Two Cultivars of Cauliflower to Simulated Insect Defoliation

Jeff G. Stewart; Kenneth B. McRae; Mark K. Sears

5
claims
10
verbatim quotes
8
citations
3
research areas
—
Not open access

Abstract

Cauliflower cultivars ‘Snowball Y’ and ‘Polar Express’ were defoliated every week by 0, 8, 18, 36, and 58% during the interval of growth from transplantation to head initiation (Period 1); from head initiation to harvest (Period 2); or from transplantation to harvest (Period 3). Leaf area at harvest, head weight, and proportion of harvested heads with a diameter of at least 10 cm decreased as the level of defoliation increased. Plants defoliated during Periods 2 and 3 were, in general, more seriously affected than plants defoliated during Period 1. Estimates of the number of cabbage looper equivalents needed to reduce head weight by 1% were higher for plants defoliated during Period 1 compared with plants damaged during Periods 2 or 3.

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Claims 5

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Leaf area at harvest decreased as defoliation increased.

Treatment
level of defoliatione0
Outcome
Leaf area at harveste0
Direction
decreasede0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Brassica oleracea var. botrytis
Brassica oleracea var. botrytis · TaxonSusan Slater · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Leaf area at harvest, head weight, and proportion of harvested heads with a diameter of at least 10 cm decreased as the level of defoliation increased.”

✓ located verbatim in the source · abstract, characters 280–431 · show in text ↑
t0

“Cauliflower”

✓ located verbatim in the source · title, characters 29–40 · show in text ↑
Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

head weight decreased as defoliation increased.

Treatment
level of defoliatione0
Outcome
head weighte0
Direction
decreasede0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Brassica oleracea var. botrytis
Brassica oleracea var. botrytis · TaxonSusan Slater · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Leaf area at harvest, head weight, and proportion of harvested heads with a diameter of at least 10 cm decreased as the level of defoliation increased.”

✓ located verbatim in the source · abstract, characters 280–431 · show in text ↑
t0

“Cauliflower”

✓ located verbatim in the source · title, characters 29–40 · show in text ↑
Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

proportion of harvested heads with a diameter of at least 10 cm decreased as defoliation increased.

Treatment
level of defoliatione0
Outcome
proportion of harvested heads with a diameter of at least 10 cme0
Direction
decreasede0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Brassica oleracea var. botrytis
Brassica oleracea var. botrytis · TaxonSusan Slater · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Leaf area at harvest, head weight, and proportion of harvested heads with a diameter of at least 10 cm decreased as the level of defoliation increased.”

✓ located verbatim in the source · abstract, characters 280–431 · show in text ↑
t0

“Cauliflower”

✓ located verbatim in the source · title, characters 29–40 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Defoliation in Periods 2 and 3 affected cauliflower more seriously than in Period 1.

Treatment
Periods 2 and 3e0
Outcome
more seriously affectede0
Direction
more seriously affectede0
Comparator
Period 1e0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Brassica oleracea var. botrytis
Brassica oleracea var. botrytis · TaxonSusan Slater · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Plants defoliated during Periods 2 and 3 were, in general, more seriously affected than plants defoliated during Period 1.”

✓ located verbatim in the source · abstract, characters 432–554 · show in text ↑
t0

“Cauliflower”

✓ located verbatim in the source · title, characters 29–40 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

More cabbage looper equivalents were needed for a 1% head-weight reduction in Period 1 than in Periods 2 or 3.

Organ / stage
Period 1e0
Interactor
cabbage looperTrichoplusia nie0pest
Outcome
number of cabbage looper equivalents needed to reduce head weight by 1%e0
Direction
highere0
Comparator
Periods 2 or 3e0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Brassica oleracea var. botrytis
Brassica oleracea var. botrytis · TaxonSusan Slater · CC BY-SA 4.0 · Wikimedia Commons ↗
Trichoplusia ni
Trichoplusia ni · InteractorWhitney Cranshaw, Colorado State University, Bugwood.org · CC BY 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“Estimates of the number of cabbage looper equivalents needed to reduce head weight by 1% were higher for plants defoliated during Period 1 compared with plants damaged during Periods 2 or 3.”

✓ located verbatim in the source · abstract, characters 555–745 · show in text ↑
t0

“Cauliflower”

✓ located verbatim in the source · title, characters 29–40 · show in text ↑