Abstract
Results of the long term research have shown that the cabbage moth causes a serious threat to spring rape plantings in Leningrad Province. During the last decade, there were several cases of mass reproduction of this species when high population density of the insect and heavy injury to the rape leaves and buds were recorded. Mass reproduction of the moth was observed in the early and warm spring, when the plantings were infested by the butter ies earlier and simultaneously, and the caterpillars were feeding on rape plants at the initial stages of their development that strongly reduced the crop yield. The situation was getting worse on rape that was sown late and was also damaged earlier by Phyllotreta ea beetles, and in the hot, dry weather. The crop yield of spring rape was decreased from damage caused by caterpillars according to the data averaged over the entire period of research by 4.7% (0.65 centner∙ha-1), in the years of mass reproduction, by 84%, and in the years of low population, by 2.5%. The harmfulness of cabbage moth caterpillars increased by 2.3 and 4.5 times when leaf area was damaged by 26-50% and more than 50%, respectively, as compared to when damage was low and not exceeding 25%. Application of full dose of mineral fertilizers decreased injury to the leaves and buds by cabbage moth caterpillars and harm caused to spring rape due to a higher plant potential to recover from the damage in icted.
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Claims 11
Claim · model-written summary
Cabbage moth caused a serious threat to spring rape plantings in Leningrad Province.
- Taxon
- spring rape
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napuse0 - Interactor
- cabbage mothe0pest
- Outcome
- serious threate0
- Setting
- Leningrad Provincee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“the cabbage moth causes a serious threat to spring rape plantings in Leningrad Province.”
Claim · model-written summary
Mass moth reproduction coincided with high populations and heavy injury to rape leaves and buds.
- Taxon
- spring rapeBrassica napust0
- Interactor
- cabbage motht0pest
- Outcome
- heavy injury to the rape leaves and budse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there were several cases of mass reproduction of this species when high population density of the insect and heavy injury to the rape leaves and buds were recorded.”
t0“cabbage moth (Plutella xylostella (L.); Lepidoptera, Plutellidae) on the spring rape crops”
Claim · model-written summary
Early warm springs favored mass moth reproduction and initial-stage feeding reduced rape yield.
- Taxon
- rape plantsBrassica napuse0
- Interactor
- mothe0pest
- Outcome
- crop yielde0
- Direction
- strongly reducede0
- Qualifier
- early and warm springe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mass reproduction of the moth was observed in the early and warm spring, when the plantings were infested by the butter ies earlier and simultaneously, and the caterpillars were feeding on rape plants at the initial stages of their development that strongly reduced the crop yield.”
Claim · model-written summary
Late sowing, flea beetle injury and hot dry weather worsened the situation.
- Taxon
- rapeBrassica napuse0
- Treatment
- sown latee0
- Interactor
- Phyllotreta ea beetlese0pest
- Outcome
- situation was getting worsee0
- Direction
- getting worsee0
- Qualifier
- hot, dry weathere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The situation was getting worse on rape that was sown late and was also damaged earlier by Phyllotreta ea beetles, and in the hot, dry weather.”
Claim · model-written summary
Caterpillar damage decreased average spring rape yield by 4.7% across the study.
- Taxon
- spring rapeBrassica napuse0
- Interactor
- caterpillarse0pest
- Outcome
- crop yielde0
- Direction
- decreasede0
- Value
- 4.7% (0.65 centner∙ha-1)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The crop yield of spring rape was decreased from damage caused by caterpillars according to the data averaged over the entire period of research by 4.7% (0.65 centner∙ha-1)”
Claim · model-written summary
Caterpillar damage decreased yield by 84% in mass reproduction years.
- Taxon
- spring rapeBrassica napust0
- Interactor
- cabbage motht0pest
- Outcome
- crop yielde1
- Direction
- decreasede1
- Value
- 84%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the years of mass reproduction, by 84%”
e1“The crop yield of spring rape was decreased”
t0“cabbage moth (Plutella xylostella (L.); Lepidoptera, Plutellidae) on the spring rape crops”
Claim · model-written summary
Caterpillar damage decreased yield by 2.5% in low-population years.
- Taxon
- spring rapeBrassica napust0
- Interactor
- cabbage motht0pest
- Outcome
- crop yielde1
- Direction
- decreasede1
- Value
- 2.5%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the years of low population, by 2.5%.”
e1“The crop yield of spring rape was decreased”
t0“cabbage moth (Plutella xylostella (L.); Lepidoptera, Plutellidae) on the spring rape crops”
Claim · model-written summary
Moth harmfulness rose 2.3-fold with 26-50% leaf damage versus at most 25%.
- Taxon
- spring rapeBrassica napust0
- Interactor
- cabbage moth caterpillarse0pest
- Outcome
- harmfulness of cabbage moth caterpillarse0
- Direction
- increasede0
- Value
- 2.3e0
- Qualifier
- 26-50%e0
- Comparator
- damage was low and not exceeding 25%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The harmfulness of cabbage moth caterpillars increased by 2.3 and 4.5 times when leaf area was damaged by 26-50% and more than 50%, respectively, as compared to when damage was low and not exceeding 25%.”
t0“spring rape crops”
Claim · model-written summary
Moth harmfulness rose 4.5-fold with over 50% leaf damage versus at most 25%.
- Taxon
- spring rapeBrassica napust0
- Interactor
- cabbage moth caterpillarse0pest
- Outcome
- harmfulness of cabbage moth caterpillarse0
- Direction
- increasede0
- Value
- 4.5 timese0
- Qualifier
- more than 50%e0
- Comparator
- damage was low and not exceeding 25%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The harmfulness of cabbage moth caterpillars increased by 2.3 and 4.5 times when leaf area was damaged by 26-50% and more than 50%, respectively, as compared to when damage was low and not exceeding 25%.”
t0“spring rape crops”
Claim · model-written summary
Full-dose mineral fertilizers decreased moth injury to rape leaves and buds.
- Taxon
- spring rapeBrassica napuse0
- Treatment
- full dose of mineral fertilizerse0
- Interactor
- cabbage moth caterpillarse0pest
- Outcome
- injury to the leaves and buds by cabbage moth caterpillarse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of full dose of mineral fertilizers decreased injury to the leaves and buds by cabbage moth caterpillars and harm caused to spring rape due to a higher plant potential to recover from the damage in icted.”
Claim · model-written summary
Full-dose mineral fertilizers decreased harm to spring rape by increasing recovery potential.
- Taxon
- spring rapeBrassica napuse0
- Treatment
- full dose of mineral fertilizerse0
- Interactor
- cabbage moth caterpillarse0pest
- Outcome
- harm caused to spring rapee0
- Direction
- decreasede0
- Qualifier
- higher plant potential to recover from the damagee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of full dose of mineral fertilizers decreased injury to the leaves and buds by cabbage moth caterpillars and harm caused to spring rape due to a higher plant potential to recover from the damage in icted.”
The same questions in other papers
fertilization · organism · Brassica napus (oilseed rape)Positive and negative results
5 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- no effect
- positive
4 papers more in this group
See all 8 papers →fertilization · crop injury · Brassica napus (oilseed rape)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.