Paper · 1991 · The Canadian Entomologist

EFFECTS OF ROOT DAMAGE BY CABBAGE MAGGOT, DELIA RADICUM (L.) (DIPTERA: ANTHOMYIIDAE), ON YIELD OF CANOLA, BRASSICA CAMPESTRIS L., UNDER LABORATORY CONDITIONS

R.S. McDonald; M.K. Sears

7
claims
14
verbatim quotes
15
citations
3
research areas
—
Not open access

Abstract

Abstract The effects of root damage by larval cabbage maggots, Delia radicum (L.), on yield of canola, Brassica campestris L., were examined in laboratory experiments. Inoculations of eggs or first-instar larvae resulted in significant root damage. Damage that exceeded 50% of taproot surface area resulted in fewer racemes, fewer productive seed pods on axillary racemes, lower total biomass, and reduced yield of seed. Despite the latter effect, damage that restricts the number of flowering racemes and induces abortion of seed on axillary racemes may increase the efficiency of yield in canola, which flowers indeterminately over a short growing season.

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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 7

Intervention effectobservedoriginal resultnegativesignificant (as stated)measured

Claim · model-written summary

Egg inoculation caused significant root damage.

Treatment
Inoculations of eggse0
Interactor
cabbage maggotse0pest
Outcome
root damagee0
Direction
resulted ine0

Not reportedComparator

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

Brassica napus var. napus
Brassica napus var. napus · Taxoncontri from Yonezawa-Shi, Yamagata, Japan · CC BY-SA 2.0 · Wikimedia Commons ↗
Brassica rapa subsp. oleifera
Brassica rapa subsp. oleifera · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The effects of root damage by larval cabbage maggots, Delia radicum (L.), on yield of canola, Brassica campestris L., were examined in laboratory experiments. Inoculations of eggs or first-instar larvae resulted in significant root damage.”

✓ located verbatim in the source · abstract, characters 9–248 · show in text ↑
t0

“canola, Brassica campestris L.”

✓ located after whitespace/quote normalisation · title, characters 98–128 · show in text ↑
Intervention effectobservedoriginal resultnegativesignificant (as stated)measured

Claim · model-written summary

First-instar larval inoculation caused significant root damage.

Treatment
first-instar larvaee0
Interactor
cabbage maggotse0pest
Outcome
root damagee0
Direction
resulted ine0

Not reportedComparator

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

Brassica napus var. napus
Brassica napus var. napus · Taxoncontri from Yonezawa-Shi, Yamagata, Japan · CC BY-SA 2.0 · Wikimedia Commons ↗
Brassica rapa subsp. oleifera
Brassica rapa subsp. oleifera · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The effects of root damage by larval cabbage maggots, Delia radicum (L.), on yield of canola, Brassica campestris L., were examined in laboratory experiments. Inoculations of eggs or first-instar larvae resulted in significant root damage.”

✓ located verbatim in the source · abstract, characters 9–248 · show in text ↑
t0

“canola, Brassica campestris L.”

✓ located after whitespace/quote normalisation · title, characters 98–128 · show in text ↑
Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Root damage above 50% of taproot surface area led to fewer racemes.

Treatment
Damage that exceeded 50% of taproot surface areae0
Outcome
racemese0
Direction
fewere0
Value
50%e0

Not reportedInteractor

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

Brassica napus var. napus
Brassica napus var. napus · Taxoncontri from Yonezawa-Shi, Yamagata, Japan · CC BY-SA 2.0 · Wikimedia Commons ↗
Brassica rapa subsp. oleifera
Brassica rapa subsp. oleifera · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Damage that exceeded 50% of taproot surface area resulted in fewer racemes, fewer productive seed pods on axillary racemes, lower total biomass, and reduced yield of seed.”

✓ located verbatim in the source · abstract, characters 249–420 · show in text ↑
t0

“canola, Brassica campestris L.”

✓ located after whitespace/quote normalisation · title, characters 98–128 · show in text ↑
Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Root damage above 50% of taproot surface area led to fewer productive seed pods on axillary racemes.

Treatment
Damage that exceeded 50% of taproot surface areae0
Outcome
productive seed pods on axillary racemese0
Direction
fewere0
Value
50%e0

Not reportedInteractor

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

Brassica napus var. napus
Brassica napus var. napus · Taxoncontri from Yonezawa-Shi, Yamagata, Japan · CC BY-SA 2.0 · Wikimedia Commons ↗
Brassica rapa subsp. oleifera
Brassica rapa subsp. oleifera · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Damage that exceeded 50% of taproot surface area resulted in fewer racemes, fewer productive seed pods on axillary racemes, lower total biomass, and reduced yield of seed.”

✓ located verbatim in the source · abstract, characters 249–420 · show in text ↑
t0

“canola, Brassica campestris L.”

✓ located after whitespace/quote normalisation · title, characters 98–128 · show in text ↑
Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Root damage above 50% of taproot surface area led to lower total biomass.

Treatment
Damage that exceeded 50% of taproot surface areae0
Outcome
total biomasse0
Direction
lowere0
Value
50%e0

Not reportedInteractor

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

Brassica napus var. napus
Brassica napus var. napus · Taxoncontri from Yonezawa-Shi, Yamagata, Japan · CC BY-SA 2.0 · Wikimedia Commons ↗
Brassica rapa subsp. oleifera
Brassica rapa subsp. oleifera · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Damage that exceeded 50% of taproot surface area resulted in fewer racemes, fewer productive seed pods on axillary racemes, lower total biomass, and reduced yield of seed.”

✓ located verbatim in the source · abstract, characters 249–420 · show in text ↑
t0

“canola, Brassica campestris L.”

✓ located after whitespace/quote normalisation · title, characters 98–128 · show in text ↑
Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Root damage above 50% of taproot surface area led to reduced yield of seed.

Treatment
Damage that exceeded 50% of taproot surface areae0
Outcome
yield of seede0
Direction
reducede0
Value
50%e0

Not reportedInteractor

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

Brassica napus var. napus
Brassica napus var. napus · Taxoncontri from Yonezawa-Shi, Yamagata, Japan · CC BY-SA 2.0 · Wikimedia Commons ↗
Brassica rapa subsp. oleifera
Brassica rapa subsp. oleifera · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Damage that exceeded 50% of taproot surface area resulted in fewer racemes, fewer productive seed pods on axillary racemes, lower total biomass, and reduced yield of seed.”

✓ located verbatim in the source · abstract, characters 249–420 · show in text ↑
t0

“canola, Brassica campestris L.”

✓ located after whitespace/quote normalisation · title, characters 98–128 · show in text ↑
Mechanismauthor interpretationoriginal resultpositivemeasured

Claim · model-written summary

Restricting flowering racemes and aborting axillary-raceme seed may increase yield efficiency in canola.

Outcome
efficiency of yielde0
Direction
increasee0
Qualifier
damage that restricts the number of flowering racemes and induces abortion of seed on axillary racemese0

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

Brassica napus var. napus
Brassica napus var. napus · Taxoncontri from Yonezawa-Shi, Yamagata, Japan · CC BY-SA 2.0 · Wikimedia Commons ↗
Brassica rapa subsp. oleifera
Brassica rapa subsp. oleifera · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Despite the latter effect, damage that restricts the number of flowering racemes and induces abortion of seed on axillary racemes may increase the efficiency of yield in canola, which flowers indeterminately over a short growing season.”

✓ located verbatim in the source · abstract, characters 421–657 · show in text ↑
t0

“canola, Brassica campestris L.”

✓ located after whitespace/quote normalisation · title, characters 98–128 · show in text ↑

inoculation · pest · Brassica rapa (field mustard)Positive and negative results

6 papers: 3 positive, 3 negative or no effect

2 papers in the same direction as this paper · 3 in the opposite direction

  1. positive
  2. positive
  3. positive

2 papers more in this group

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inoculation · pest · Brassica napus (oilseed rape)Positive and negative results

7 papers: 2 positive, 5 negative or no effect

4 papers in the same direction as this paper · 2 in the opposite direction

  1. positive
  2. positive
  3. negative

3 papers more in this group

See all 7 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.