Abstract
The brown planthopper, Nilaparvata lugens (Stål)[BPH], is a damaging pest of rice in Asia. Insecticides and rice varietal resistance are widely implemented BPH management practices. However, outbreaks of BPH have been linked to excessive insecticide use—challenging the compatibility of these two management practices. IR62 is a variety with resistance against BPH, the whitebacked planthopper, Sogatella furcifera Horváth [WBPH], and the green leafhopper, Nephotettix virescens (Distant)[GLH]. We compared BPH responses to IR62 and to the susceptible variety IR64 treated with buprofezin, carbofuran, cartap hydrochloride, cypermethrin, deltamethrin, fipronil, or thiamethoxam + chlorantraniliprole. In greenhouse bioassays, cypermethrin, fipronil and thiamethoxam + chlorantraniliprole reduced egg laying on both varieties, and, together with buprofezin, reduced nymph survival to zero. Buprofezin, carbofuran, and cartap hydrochloride stimulated egg laying, and carbofuran increased nymph biomass, but these effects were reduced on IR62. Planthopper populations were ten times higher on deltamethrin-treated rice than untreated rice in a screenhouse experiment. Host resistance failed to buffer against this insecticide-induced resurgence in BPH and WBPH. However, IR62 reduced the effect in GLH. Rice treated with cypermethrin and fipronil had reduced yields compared to untreated controls, suggesting possible phytotoxic effects. We found little evidence of synergies between the two management practices; but host resistance did buffer against the undesirable effects of some insecticides.
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Claims 18
Claim · model-written summary
IR62 is resistant to BPH, WBPH, and GLH.
- Taxon
- rice
Oryza sativae1 - Material
- IR62e0
- Outcome
- resistance against BPH, the whitebacked planthopper, Sogatella furcifera Horváth [WBPH], and the green leafhopper, Nephotettix virescens (Distant)[GLH]e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“IR62 is a variety with resistance against BPH, the whitebacked planthopper, Sogatella furcifera Horváth [WBPH], and the green leafhopper, Nephotettix virescens (Distant)[GLH].”
e1“The brown planthopper, Nilaparvata lugens (Stål)[BPH], is a damaging pest of rice in Asia.”
Claim · model-written summary
Cypermethrin reduced BPH egg laying on both varieties.
- Taxon
- riceOryza sativae1
- Treatment
- cypermethrine0
- Outcome
- egg layinge0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cypermethrin, fipronil and thiamethoxam + chlorantraniliprole reduced egg laying on both varieties”
e1“pest of rice in Asia”
e2“The brown planthopper, Nilaparvata lugens (Stål)[BPH]”
Claim · model-written summary
Fipronil reduced BPH egg laying on both varieties.
- Taxon
- riceOryza sativae1
- Treatment
- fipronile0
- Outcome
- egg layinge0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cypermethrin, fipronil and thiamethoxam + chlorantraniliprole reduced egg laying on both varieties”
e1“pest of rice in Asia”
e2“The brown planthopper, Nilaparvata lugens (Stål)[BPH]”
Claim · model-written summary
Thiamethoxam plus chlorantraniliprole reduced BPH egg laying on both varieties.
- Taxon
- riceOryza sativae1
- Treatment
- thiamethoxam + chlorantraniliprolee0
- Outcome
- egg layinge0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cypermethrin, fipronil and thiamethoxam + chlorantraniliprole reduced egg laying on both varieties”
e1“pest of rice in Asia”
e2“The brown planthopper, Nilaparvata lugens (Stål)[BPH]”
Claim · model-written summary
Cypermethrin reduced BPH nymph survival to zero.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cypermethrin, fipronil and thiamethoxam + chlorantraniliprole reduced egg laying on both varieties, and, together with buprofezin, reduced nymph survival to zero.”
e1“pest of rice in Asia”
e2“The brown planthopper, Nilaparvata lugens (Stål)[BPH]”
Claim · model-written summary
Fipronil reduced BPH nymph survival to zero.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cypermethrin, fipronil and thiamethoxam + chlorantraniliprole reduced egg laying on both varieties, and, together with buprofezin, reduced nymph survival to zero.”
e1“pest of rice in Asia”
e2“The brown planthopper, Nilaparvata lugens (Stål)[BPH]”
Claim · model-written summary
Thiamethoxam plus chlorantraniliprole reduced BPH nymph survival to zero.
- Taxon
- riceOryza sativae1
- Treatment
- thiamethoxam + chlorantraniliprolee0
- Outcome
- nymph survivale0
- Direction
- reducede0
- Value
- zeroe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cypermethrin, fipronil and thiamethoxam + chlorantraniliprole reduced egg laying on both varieties, and, together with buprofezin, reduced nymph survival to zero.”
e1“pest of rice in Asia”
e2“The brown planthopper, Nilaparvata lugens (Stål)[BPH]”
Claim · model-written summary
Buprofezin reduced BPH nymph survival to zero.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“together with buprofezin, reduced nymph survival to zero”
e1“pest of rice in Asia”
e2“The brown planthopper, Nilaparvata lugens (Stål)[BPH]”
Claim · model-written summary
Buprofezin stimulated BPH egg laying, with less stimulation on IR62.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Buprofezin, carbofuran, and cartap hydrochloride stimulated egg laying, and carbofuran increased nymph biomass, but these effects were reduced on IR62.”
e1“pest of rice in Asia”
e2“The brown planthopper, Nilaparvata lugens (Stål)[BPH]”
Claim · model-written summary
Carbofuran stimulated BPH egg laying, with less stimulation on IR62.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Buprofezin, carbofuran, and cartap hydrochloride stimulated egg laying, and carbofuran increased nymph biomass, but these effects were reduced on IR62.”
e1“pest of rice in Asia”
e2“The brown planthopper, Nilaparvata lugens (Stål)[BPH]”
Claim · model-written summary
Cartap hydrochloride stimulated BPH egg laying, with less stimulation on IR62.
- Taxon
- riceOryza sativae1
- Material
- IR62e0
- Treatment
- cartap hydrochloridee0
- Outcome
- egg layinge0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Buprofezin, carbofuran, and cartap hydrochloride stimulated egg laying, and carbofuran increased nymph biomass, but these effects were reduced on IR62.”
e1“pest of rice in Asia”
e2“The brown planthopper, Nilaparvata lugens (Stål)[BPH]”
Claim · model-written summary
Carbofuran increased BPH nymph biomass, with less effect on IR62.
- Taxon
- riceOryza sativae1
- Material
- IR62e0
- Treatment
- carbofurane0
- Outcome
- nymph biomasse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“carbofuran increased nymph biomass, but these effects were reduced on IR62.”
e1“pest of rice in Asia”
e2“The brown planthopper, Nilaparvata lugens (Stål)[BPH]”
Claim · model-written summary
Deltamethrin-treated rice carried ten times higher planthopper populations than untreated rice.
- Taxon
- riceOryza sativae0
- Treatment
- deltamethrin-treatede0
- Outcome
- Planthopper populationse0
- Direction
- highere0
- Value
- ten timese0
- Comparator
- untreated ricee0
- Setting
- screenhousee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Planthopper populations were ten times higher on deltamethrin-treated rice than untreated rice in a screenhouse experiment.”
e1“The brown planthopper, Nilaparvata lugens (Stål)[BPH], is a damaging pest of rice in Asia.”
Claim · model-written summary
Host resistance did not buffer deltamethrin-induced BPH resurgence.
- Taxon
- riceOryza sativae1
- Outcome
- failed to buffer against this insecticide-induced resurgence in BPHe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Host resistance failed to buffer against this insecticide-induced resurgence in BPH and WBPH.”
e1“pest of rice in Asia”
Claim · model-written summary
Host resistance did not buffer deltamethrin-induced WBPH resurgence.
- Taxon
- riceOryza sativae1
- Interactor
- WBPHe2pest
- Outcome
- resurgence in BPH and WBPHe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Host resistance failed to buffer against this insecticide-induced resurgence in BPH and WBPH.”
e1“pest of rice in Asia”
e2“the whitebacked planthopper, Sogatella furcifera Horváth [WBPH]”
Claim · model-written summary
IR62 reduced the deltamethrin-related effect on GLH.
- Taxon
- riceOryza sativae1
- Material
- IR62e0
- Treatment
- IR62e0
- Interactor
- GLHe2pest
- Outcome
- effect in GLHe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, IR62 reduced the effect in GLH.”
e1“pest of rice in Asia”
e2“the green leafhopper, Nephotettix virescens (Distant)[GLH]”
Claim · model-written summary
Cypermethrin-treated rice had reduced yield versus untreated controls.
- Taxon
- RiceOryza sativae0
- Treatment
- cypermethrine0
- Outcome
- yieldse0
- Direction
- reducede0
- Comparator
- untreated controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice treated with cypermethrin and fipronil had reduced yields compared to untreated controls”
e1“pest of rice in Asia”
Claim · model-written summary
Fipronil-treated rice had reduced yield versus untreated controls.
- Taxon
- RiceOryza sativae0
- Treatment
- fipronile0
- Outcome
- yieldse0
- Direction
- reducede0
- Comparator
- untreated controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice treated with cypermethrin and fipronil had reduced yields compared to untreated controls”
The same questions in other papers
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See all 19 papers →fipronil · pest · Oryza sativa (rice)Positive and negative results
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See all 25 papers →8 of 10 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.