Abstract
Two-way effects of herbicide on rice resistance and multiplication and feeding of the rice brown planthopper (BPH), Nilaparvata lugens (Stål) were studied. Four of 11 herbicides tested, butachlor, metolachlor, oxadiazon and bentazone, had significantly stimulating effects on multiplication and feeding of BPH. Multiplication times (N 1/N 0) of BPH on the rice treated with the four herbicides were 674, 367, 322 and 311, respectively, while that of N. lugens on the untreated plants was 159. The results of measurements of honeydew production by BPH indicated that the feeding rates of the brown planthoppers increased when the insects fed on the plants treated with bentazone, quinclorac, oxadiazon and quinclorac. Survival rates of N. lugens first to third-instars rose on the rice plants treated with butachlor, bentazone, but that of the fourth and fifth instars were not affected. Furthermore, all of those herbicides tested led to a decline of rice resistance, i.e. the injury scales of the treated plants were larger than that of the control under the same pest stress. Based on their effects on rice resistance and on BPH, the herbicides tested can be divided into two categories, one affecting rice resistance and BPH multiplication, the other affecting rice resistance only.
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Claims 10
Claim · model-written summary
Four herbicides (butachlor, metolachlor, oxadiazon and bentazone) significantly stimulated multiplication and feeding of the brown planthopper.
- Taxon
- rice
Oryza sativae0 - Treatment
- butachlor, metolachlor, oxadiazon and bentazonee1
- Interactor
- Nilaparvata lugens
Nilaparvata lugense2pest - Outcome
- multiplication and feedinge1
- Direction
- stimulatinge1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two-way effects of herbicide on rice resistance”
e1“Four of 11 herbicides tested, butachlor, metolachlor, oxadiazon and bentazone, had significantly stimulating effects on multiplication and feeding of BPH”
e2“the rice brown planthopper (BPH), Nilaparvata lugens (Stål)”
Claim · model-written summary
Butachlor-treated rice gave a brown planthopper multiplication time of 674 (N1/N0), against 159 on untreated plants.
- Taxon
- riceOryza sativae0
- Treatment
- butachlore1
- Interactor
- Nilaparvata lugensNilaparvata lugense2pest
- Outcome
- Multiplication times (N 1/N 0)e3
- Direction
- stimulatinge1
- Value
- 674e3
- Qualifier
- untreated plants was 159e3
- Comparator
- untreated plantse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two-way effects of herbicide on rice resistance”
e1“Four of 11 herbicides tested, butachlor, metolachlor, oxadiazon and bentazone, had significantly stimulating effects on multiplication and feeding of BPH”
e2“the rice brown planthopper (BPH), Nilaparvata lugens (Stål)”
e3“Multiplication times (N 1/N 0) of BPH on the rice treated with the four herbicides were 674, 367, 322 and 311, respectively, while that of N. lugens on the untreated plants was 159”
Claim · model-written summary
Metolachlor-treated rice gave a brown planthopper multiplication time of 367 (N1/N0).
- Taxon
- riceOryza sativae0
- Treatment
- metolachlore1
- Interactor
- Nilaparvata lugensNilaparvata lugense2pest
- Outcome
- Multiplication times (N 1/N 0)e3
- Direction
- stimulatinge1
- Value
- 367e3
- Qualifier
- untreated plants was 159e3
- Comparator
- untreated plantse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two-way effects of herbicide on rice resistance”
e1“Four of 11 herbicides tested, butachlor, metolachlor, oxadiazon and bentazone, had significantly stimulating effects on multiplication and feeding of BPH”
e2“the rice brown planthopper (BPH), Nilaparvata lugens (Stål)”
e3“Multiplication times (N 1/N 0) of BPH on the rice treated with the four herbicides were 674, 367, 322 and 311, respectively, while that of N. lugens on the untreated plants was 159”
Claim · model-written summary
Oxadiazon-treated rice gave a brown planthopper multiplication time of 322 (N1/N0).
- Taxon
- riceOryza sativae0
- Treatment
- oxadiazone1
- Interactor
- Nilaparvata lugensNilaparvata lugense2pest
- Outcome
- Multiplication times (N 1/N 0)e3
- Direction
- stimulatinge1
- Value
- 322e3
- Qualifier
- untreated plants was 159e3
- Comparator
- untreated plantse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two-way effects of herbicide on rice resistance”
e1“Four of 11 herbicides tested, butachlor, metolachlor, oxadiazon and bentazone, had significantly stimulating effects on multiplication and feeding of BPH”
e2“the rice brown planthopper (BPH), Nilaparvata lugens (Stål)”
e3“Multiplication times (N 1/N 0) of BPH on the rice treated with the four herbicides were 674, 367, 322 and 311, respectively, while that of N. lugens on the untreated plants was 159”
Claim · model-written summary
Bentazone-treated rice gave a brown planthopper multiplication time of 311 (N1/N0).
- Taxon
- riceOryza sativae0
- Treatment
- bentazonee1
- Interactor
- Nilaparvata lugensNilaparvata lugense2pest
- Outcome
- Multiplication times (N 1/N 0)e3
- Direction
- stimulatinge1
- Value
- 311e3
- Qualifier
- untreated plants was 159e3
- Comparator
- untreated plantse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two-way effects of herbicide on rice resistance”
e1“Four of 11 herbicides tested, butachlor, metolachlor, oxadiazon and bentazone, had significantly stimulating effects on multiplication and feeding of BPH”
e2“the rice brown planthopper (BPH), Nilaparvata lugens (Stål)”
e3“Multiplication times (N 1/N 0) of BPH on the rice treated with the four herbicides were 674, 367, 322 and 311, respectively, while that of N. lugens on the untreated plants was 159”
Claim · model-written summary
Feeding rates of the brown planthopper increased on rice treated with bentazone, quinclorac, oxadiazon and quinclorac.
- Taxon
- riceOryza sativae0
- Treatment
- bentazone, quinclorac, oxadiazon and quinclorace4
- Interactor
- Nilaparvata lugensNilaparvata lugense2pest
- Outcome
- feeding ratese4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two-way effects of herbicide on rice resistance”
e2“the rice brown planthopper (BPH), Nilaparvata lugens (Stål)”
e4“the feeding rates of the brown planthoppers increased when the insects fed on the plants treated with bentazone, quinclorac, oxadiazon and quinclorac”
Claim · model-written summary
Survival of the first to third instars of the brown planthopper rose on rice treated with butachlor and bentazone.
- Taxon
- riceOryza sativae0
- Organ / stage
- first to third-instarse5
- Treatment
- butachlor, bentazonee5
- Interactor
- Nilaparvata lugensNilaparvata lugense2pest
- Outcome
- Survival ratese5
- Direction
- rosee5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two-way effects of herbicide on rice resistance”
e2“the rice brown planthopper (BPH), Nilaparvata lugens (Stål)”
e5“Survival rates of N. lugens first to third-instars rose on the rice plants treated with butachlor, bentazone, but that of the fourth and fifth instars were not affected”
Claim · model-written summary
Survival of the fourth and fifth instars of the brown planthopper was not affected by butachlor or bentazone treatment of rice.
- Taxon
- riceOryza sativae0
- Organ / stage
- fourth and fifth instarse5
- Treatment
- butachlor, bentazonee5
- Interactor
- Nilaparvata lugensNilaparvata lugense2pest
- Outcome
- Survival ratese5
- Direction
- were not affectede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two-way effects of herbicide on rice resistance”
e2“the rice brown planthopper (BPH), Nilaparvata lugens (Stål)”
e5“Survival rates of N. lugens first to third-instars rose on the rice plants treated with butachlor, bentazone, but that of the fourth and fifth instars were not affected”
Claim · model-written summary
All herbicides tested led to a decline in rice resistance, with larger injury scales than on untreated control plants under the same pest stress.
- Taxon
- riceOryza sativae0
- Treatment
- herbicides testede6
- Outcome
- rice resistancee6
- Direction
- declinee6
- Comparator
- controle6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two-way effects of herbicide on rice resistance”
e6“all of those herbicides tested led to a decline of rice resistance, i.e. the injury scales of the treated plants were larger than that of the control under the same pest stress”
Claim · model-written summary
Herbicides tested divide into two categories: those affecting rice resistance and BPH multiplication, and those affecting rice resistance only.
- Taxon
- riceOryza sativae0
- Treatment
- herbicides testede7
- Outcome
- two categoriese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two-way effects of herbicide on rice resistance”
e7“Based on their effects on rice resistance and on BPH, the herbicides tested can be divided into two categories, one affecting rice resistance and BPH multiplication, the other affecting rice resistance only”
The same questions in other papers
herbicide · disease · Oryza sativa (rice)Positive and negative results
6 papers in the same direction as this paper · 17 in the opposite direction
- no effect
- positive
- positive
20 papers more in this group
See all 24 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.