Abstract
SUMMARY A series of 17 crop-loss assessments was made under simulated farmers' field conditions in the three main rice cropping seasons of Bangladesh. The main insect pests were the rice stem borers ( Tryporyza incertulas, Chilo polychrysa, Sesamia inferens ) and in the monsoon rice gall midge ( Pachydiplosis oryzae ). Disease incidence was negligible. In the winter and early monsoon yield losses averaged 4 and 6% respectively, but economic benefit was only derived from insecticide application in the monsoon season, when there was an average yield loss of 16%. An economic threshold of 5–10% damaged tillers (‘deadhearts’ and ‘onion shoots’) was indicated for early attacks of stem borers and gall midge. Possible reasons are given for the usually low incidence of insect pests and diseases in Bangladesh rice.
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Claims 7
Claim · model-written summary
Stem borers and monsoon gall midge were the main insect pests.
- Taxon
- Rice
Oryza sativat0 - Interactor
- rice stem borerse0pest
- Outcome
- main insect pestse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The main insect pests were the rice stem borers ( Tryporyza incertulas, Chilo polychrysa, Sesamia inferens ) and in the monsoon rice gall midge ( Pachydiplosis oryzae )”
t0“Rice”
Claim · model-written summary
Disease incidence was negligible.
- Taxon
- RiceOryza sativat0
- Outcome
- Disease incidencee0
- Direction
- negligiblee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Disease incidence was negligible”
t0“Rice”
Claim · model-written summary
Winter rice yield loss averaged 4%.
- Taxon
- RiceOryza sativat0
- Outcome
- yield lossese0
- Value
- 4 and 6%e0
- Setting
- wintere0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the winter and early monsoon yield losses averaged 4 and 6% respectively”
t0“Rice”
Claim · model-written summary
Early monsoon rice yield loss averaged 6%.
- Taxon
- RiceOryza sativat0
- Outcome
- yield lossese0
- Value
- 6%e0
- Setting
- early monsoone0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the winter and early monsoon yield losses averaged 4 and 6% respectively”
t0“Rice”
Claim · model-written summary
Monsoon rice yield loss averaged 16%.
- Taxon
- RiceOryza sativat0
- Outcome
- yield losse0
- Value
- 16%e0
- Setting
- monsoon seasone0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the monsoon season, when there was an average yield loss of 16%”
t0“Rice”
Claim · model-written summary
Insecticide application had economic benefit only in the monsoon season.
- Taxon
- RiceOryza sativat0
- Treatment
- insecticide applicatione0
- Outcome
- economic benefite0
- Setting
- monsoon seasone0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“economic benefit was only derived from insecticide application in the monsoon season”
t0“Rice”
Claim · model-written summary
The indicated economic threshold for early stem-borer and gall-midge attacks was 5–10% damaged tillers.
- Taxon
- RiceOryza sativat0
- Interactor
- stem borerse0pest
- Second interactor
- gall midgee0pest
- Outcome
- economic thresholde0
- Value
- 5–10% damaged tillerse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An economic threshold of 5–10% damaged tillers (‘deadhearts’ and ‘onion shoots’) was indicated for early attacks of stem borers and gall midge”
t0“Rice”
The same questions in other papers
insecticide · yield · Oryza sativa (rice)Results differ
49 papers in the same direction as this paper · 9 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
- negative
56 papers more in this group
See all 60 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.