Abstract
BACKGROUND: The transmission of plant viruses is closely associated with the specific probing behaviors of the vectors. Pymetrozine is a pyridine azomethine insecticide that interferes with nervous regulation of feeding behavior of piercing-sucking insects. This study aimed to evaluate the potential of sublethal concentrations of pymetrozine in reducing the transmission of Southern rice black-streaked dwarf virus (SRBSDV) by the planthopper Sogatella furcifera. RESULTS: ) pymetrozine compared with the insects feeding on the control plants, for which significant effects of pymetrozine concentration and time post-treatment were detected. Honeydew excretion of the planthoppers showed significant reduction with increasing concentration of the insecticide but no significant association with time post-treatment. Electrical penetration graph recordings revealed that total durations of each waveform in both acquisition and inoculation were significantly affected by pymetrozine treatment, with total durations of non-probing (NP), penetration initiation (N1), and extracellular activity (N3) elongated whereas those of salivation (N2) and phloem-related activities (N4-a and N4-b) shortened. Additionally, both acquisition and inoculation rates were significantly lower at 168 h than at 6 h post-treatment. CONCLUSION: The results indicate that sublethal concentrations of pymetrozine reduce SRBSDV transmission, which is associated with reduction in feeding and alteration in probing behaviors characterized by the prolonged non-probing, penetration initiation and extracellular activity and shortened salivation and phloem-related activities. © 2023 Society of Chemical Industry.
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Claims 7
Claim · model-written summary
Pymetrozine reduced honeydew excretion as concentration increased.
- Taxon
- rice
Oryza sativat0 - Treatment
- insecticidee0
- Interactor
- planthoppersFulgoromorphae0pest
- Outcome
- Honeydew excretion of the planthopperse0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“Honeydew excretion of the planthoppers showed significant reduction with increasing concentration of the insecticide but no significant association with time post-treatment.”
Claim · model-written summary
Honeydew excretion had no significant association with time after treatment.
- Taxon
- riceOryza sativat0
- Treatment
- time post-treatmente0
- Interactor
- planthoppersFulgoromorphae0pest
- Outcome
- Honeydew excretion of the planthopperse0
- Direction
- no significant associatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“Honeydew excretion of the planthoppers showed significant reduction with increasing concentration of the insecticide but no significant association with time post-treatment.”
Claim · model-written summary
Pymetrozine lengthened non-probing, penetration initiation and extracellular activity during virus acquisition and inoculation.
- Taxon
- riceOryza sativat0
- Treatment
- pymetrozine treatmente0
- Interactor
- Sogatella furciferaSogatella furciferat1pest
- Outcome
- total durations of non-probing (NP), penetration initiation (N1), and extracellular activity (N3)e0
- Direction
- elongatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
t1“Sogatella furcifera”
e0“Electrical penetration graph recordings revealed that total durations of each waveform in both acquisition and inoculation were significantly affected by pymetrozine treatment, with total durations of non-probing (NP), penetration initiation (N1), and extracellular activity (N3) elongated whereas those of salivation (N2) and phloem-related activities (N4-a and N4-b) shortened.”
Claim · model-written summary
Pymetrozine shortened salivation and phloem-related activities during virus acquisition and inoculation.
- Taxon
- riceOryza sativat0
- Treatment
- pymetrozine treatmente0
- Interactor
- Sogatella furciferaSogatella furciferat1pest
- Outcome
- salivation (N2) and phloem-related activities (N4-a and N4-b)e0
- Direction
- shortenede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
t1“Sogatella furcifera”
e0“Electrical penetration graph recordings revealed that total durations of each waveform in both acquisition and inoculation were significantly affected by pymetrozine treatment, with total durations of non-probing (NP), penetration initiation (N1), and extracellular activity (N3) elongated whereas those of salivation (N2) and phloem-related activities (N4-a and N4-b) shortened.”
Claim · model-written summary
Virus acquisition and inoculation rates were lower at 168 h than 6 h after treatment.
- Taxon
- riceOryza sativat0
- Treatment
- 168 he0
- Interactor
- Sogatella furciferaSogatella furciferat1pest
- Outcome
- acquisition and inoculation ratese0
- Direction
- lowere0
- Comparator
- 6 h post-treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
t1“Sogatella furcifera”
e0“both acquisition and inoculation rates were significantly lower at 168 h than at 6 h post-treatment.”
Claim · model-written summary
Sublethal pymetrozine reduced Southern rice black-streaked dwarf virus transmission.
- Taxon
- riceOryza sativat0
- Treatment
- sublethal concentrations of pymetrozinee0
- Interactor
- Sogatella furciferaSogatella furciferat1pest
- Outcome
- SRBSDV transmissione0
- Direction
- reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
t1“Sogatella furcifera”
e0“sublethal concentrations of pymetrozine reduce SRBSDV transmission”
Claim · model-written summary
Pymetrozine concentration and time after treatment significantly affected the initially reported response, whose endpoint is truncated.
- Taxon
- riceOryza sativat0
- Outcome
- significant effects of pymetrozine concentration and time post-treatmente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“for which significant effects of pymetrozine concentration and time post-treatment were detected.”
The same questions in other papers
pymetrozine · Sogatella furcifera · Oryza sativa (rice)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
See all 5 papers →insecticide · Fulgoromorpha · Oryza sativa (rice)Results agree
1 paper in the same direction as this paper
- 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.