Abstract
Background: Rice stem borers are among the most biotic stresses of economic importance in agriculture. Little was known about stem borer problem in Tanzania prior to this study. Understanding stem borer abundance and damages would help to design appropriate stem borer integrated pest management strategy in rice. This study was aimed at investigating rice stem borers species abundance and their associated damages in irrigated lowland rice ecosystem in Kilombero Tanzania. Materials and Methods: Field survey study on rice stem borer abundance and incidences were conducted in farmers fields on selected rice varieties at varied growth stages in Kilombero district under irrigated rice schemes. Adult moths were trapped by light traps and incidences assessed based on dead hearts and white head in 1 m 2 quadrat in field stratum sampled at random. Results: Results indicated the presence of Chilo sp. and Sesamia calamistis in all study areas with Chilo sp., as most abundant species (79.24-92.05%) followed by S. calamist (7.97-20.77%). The abundance of these two stem borer species and their associated damage incidences varied significantly between rice varieties and rice growth stages (p<0.05). The insecticides sprayed on different rice varieties had neither effect on species abundance nor on incidences of stem borers under the study area suggesting that the sprayed insecticides did not control the pest. Conclusion: This study therefore concluded that control measures particularly IPM is highly recommended short of which the control of stem borer will in future be unachievable.
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Claims 5
Claim · model-written summary
Chilo sp. was the most abundant stem borer species on irrigated rice, at 79.24-92.05%.
- Taxon
- Rice
Oryza sativae0 - Outcome
- most abundant speciese1
- Value
- 79.24-92.05%e1
ChiloOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice stem borers are among the most biotic stresses of economic importance in agriculture”
e1“with Chilo sp., as most abundant species (79.24-92.05%)”
Claim · model-written summary
Sesamia calamistis was the second most abundant stem borer species on irrigated rice, at 7.97-20.77%.
- Taxon
- RiceOryza sativae0
- Interactor
- S. calamiste2pest
- Outcome
- abundancee3
- Value
- 7.97-20.77%e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice stem borers are among the most biotic stresses of economic importance in agriculture”
e2“followed by S. calamist (7.97-20.77%)”
e3“The abundance of these two stem borer species and their associated damage incidences varied significantly between rice varieties and rice growth stages (p<0.05)”
Claim · model-written summary
Stem borer abundance and damage incidence varied significantly between rice varieties and growth stages.
- Taxon
- RiceOryza sativae0
- Material
- rice varietiese3
- Interactor
- stem borer speciese3pest
- Outcome
- abundancee3
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice stem borers are among the most biotic stresses of economic importance in agriculture”
e3“The abundance of these two stem borer species and their associated damage incidences varied significantly between rice varieties and rice growth stages (p<0.05)”
Claim · model-written summary
Insecticide sprays on rice had no effect on stem borer abundance or incidence and did not control the pest.
- Taxon
- RiceOryza sativae0
- Treatment
- insecticides sprayede4
- Interactor
- stem borerse4pest
- Outcome
- species abundancee4
- Direction
- neither effecte4
- Qualifier
- did not control the peste5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice stem borers are among the most biotic stresses of economic importance in agriculture”
e4“The insecticides sprayed on different rice varieties had neither effect on species abundance nor on incidences of stem borers under the study area”
e5“suggesting that the sprayed insecticides did not control the pest”
Claim · model-written summary
Integrated pest management is highly recommended for stem borer control in rice.
- Taxon
- RiceOryza sativae0
- Outcome
- control measures particularly IPMe6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice stem borers are among the most biotic stresses of economic importance in agriculture”
e6“control measures particularly IPM is highly recommended short of which the control of stem borer will in future be unachievable”
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See all 55 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.