Abstract
(Walker) (Lepidoptera: Noctuidae) has become a rice pest in some rice-producing regions. The cause of this shift from secondary to major pest is unknown. The major purpose of this study was to examine the effect of five commonly used pesticides in rice fields on reproduction of PSB and on biochemical substances of rice plants. The results showed that the weight of pupae developed from 1st instar larvae treated with 2 mg/L triazophos and the number of eggs laid by emerged females from the treatment were significantly greater than those of the control, increasing by 26.2% and 47%, respectively. In addition, a nontarget insecticide, pymetrozine 100 mg/L, and a target insecticide, chlorantraniliprole 2 mg/L, stimulated reproduction of PSB. Biochemical measurement showed that foliar sprays of these pesticides resulted in significant reductions of contents of resistant substances, flavonoids and phenolic acids, in rice plants. For example, flavonoids and phenolic acids of rice plants treated with triazophos reduced by 48.5% and 22.4%, respectively, compared to the control. Therefore, we predicted that the application of some pesticides, eg triazophos and chlorantraniliprole, may be the cause of the increase in the population numbers of PSB in rice fields.
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Claims 8
Claim · model-written summary
Triazophos at 2 mg/L applied to first-instar larvae increased the weight of pupae by 26.2% compared with the control.
- Taxon
- rice
Oryza sativae0 - Treatment
- 2 mg/L triazophose1
- Interactor
- Sesamia inferens
Sesamia inferenst0pest - Outcome
- weight of pupaee1
- Direction
- greatere1
- Value
- 26.2%e1
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sesamia inferens”
e0“has become a rice pest in some rice-producing regions”
e1“the weight of pupae developed from 1st instar larvae treated with 2 mg/L triazophos and the number of eggs laid by emerged females from the treatment were significantly greater than those of the control, increasing by 26.2% and 47%, respectively”
Claim · model-written summary
Triazophos at 2 mg/L increased the number of eggs laid by emerged females by 47% compared with the control.
- Taxon
- riceOryza sativae0
- Treatment
- 2 mg/L triazophose1
- Interactor
- Sesamia inferensSesamia inferenst0pest
- Outcome
- number of eggs laide1
- Direction
- greatere1
- Value
- 47%e1
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sesamia inferens”
e0“has become a rice pest in some rice-producing regions”
e1“the weight of pupae developed from 1st instar larvae treated with 2 mg/L triazophos and the number of eggs laid by emerged females from the treatment were significantly greater than those of the control, increasing by 26.2% and 47%, respectively”
Claim · model-written summary
Pymetrozine at 100 mg/L stimulated the reproduction of Sesamia inferens.
- Taxon
- riceOryza sativae0
- Treatment
- pymetrozine 100 mg/Le2
- Interactor
- Sesamia inferensSesamia inferenst0pest
- Outcome
- reproductione2
- Direction
- stimulatede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sesamia inferens”
e0“has become a rice pest in some rice-producing regions”
e2“a nontarget insecticide, pymetrozine 100 mg/L, and a target insecticide, chlorantraniliprole 2 mg/L, stimulated reproduction of PSB”
Claim · model-written summary
Chlorantraniliprole at 2 mg/L stimulated the reproduction of Sesamia inferens.
- Taxon
- riceOryza sativae0
- Treatment
- chlorantraniliprole 2 mg/Le2
- Interactor
- Sesamia inferensSesamia inferenst0pest
- Outcome
- reproductione2
- Direction
- stimulatede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sesamia inferens”
e0“has become a rice pest in some rice-producing regions”
e2“a nontarget insecticide, pymetrozine 100 mg/L, and a target insecticide, chlorantraniliprole 2 mg/L, stimulated reproduction of PSB”
Claim · model-written summary
Foliar sprays of the pesticides significantly reduced the contents of resistant substances in rice plants.
- Taxon
- rice plantsOryza sativae3
- Treatment
- foliar sprays of these pesticidese3
- Compound
- flavonoids and phenolic acidse3
- Outcome
- contents of resistant substancese3
- Direction
- reductionse3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sesamia inferens”
e0“has become a rice pest in some rice-producing regions”
e3“Biochemical measurement showed that foliar sprays of these pesticides resulted in significant reductions of contents of resistant substances, flavonoids and phenolic acids, in rice plants”
Claim · model-written summary
Triazophos reduced flavonoid content of rice plants by 48.5% compared with the control.
- Taxon
- rice plantsOryza sativae4
- Treatment
- triazophose4
- Outcome
- flavonoidse4
- Direction
- reducede4
- Value
- 48.5%e4
- Comparator
- controle4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sesamia inferens”
e0“has become a rice pest in some rice-producing regions”
e4“flavonoids and phenolic acids of rice plants treated with triazophos reduced by 48.5% and 22.4%, respectively, compared to the control”
Claim · model-written summary
Triazophos reduced phenolic acid content of rice plants by 22.4% compared with the control.
- Taxon
- rice plantsOryza sativae4
- Treatment
- triazophose4
- Outcome
- phenolic acidse4
- Direction
- reducede4
- Value
- 22.4%e4
- Comparator
- controle4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sesamia inferens”
e0“has become a rice pest in some rice-producing regions”
e4“flavonoids and phenolic acids of rice plants treated with triazophos reduced by 48.5% and 22.4%, respectively, compared to the control”
Claim · model-written summary
Application of some pesticides, such as triazophos and chlorantraniliprole, may have caused the increase in PSB population numbers in rice fields.
- Taxon
- riceOryza sativae5
- Treatment
- application of some pesticidese5
- Outcome
- population numberse5
- Qualifier
- may be the causee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sesamia inferens”
e5“we predicted that the application of some pesticides, eg triazophos and chlorantraniliprole, may be the cause of the increase in the population numbers of PSB in rice fields”
The same questions in other papers
triazophos · Sesamia inferens · Oryza sativa (rice)Results agree
1 paper in the same direction as this paper
- negative
pymetrozine · Sesamia inferens · Oryza sativa (rice)Results agree
1 paper in the same direction as this paper
- negative
chlorantraniliprole · Sesamia inferens · Oryza sativa (rice)Results agree
1 paper in the same direction as this paper
- negative
triazophos · quality: phytochemicals · Oryza sativa (rice)Results agree
1 paper in the same direction as this paper
- negative
insecticide · disease · Oryza sativa (rice)Positive and negative results
8 in the opposite direction
- positive
- positive
- positive
5 papers more in this group
See all 9 papers →application · disease · Oryza sativa (rice)Positive and negative results
15 papers in the same direction as this paper · 155 in the opposite direction
- positive
- positive
- positive
167 papers more in this group
See all 171 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.