Abstract
Control of the Mal de Río Cuarto virus (MRCV) and its planthopper vector Delphacodes kuscheli was studied on maize hybrids whose seeds had been treated with systemic insecticides. Laboratory tests were performed to determine the effects of seed treatments with insecticides (acephate, carbofuran, imidacloprid) on the survival of the planthopper. Field experiments using four maize hybrids whose seeds had been treated with the insecticides were performed to establish the effect of the latter on MRCV incidence and severity, and on grain yield. MRCV infection was confirmed by DAS-ELISA. Carbofuran was the most effective insecticide in laboratory tests, independently of the hybrid tested, followed by imidacloprid and acephate. MRCV incidences were high in all treatments in the field test under natural planthopper infestations. Disease severity data analysis indicated that the insecticide - hybrid interaction was not significant. Maize hybrid Dekalb 664 and the imidacloprid treatments had the lowest severity means among the four hybrids and three insecticide treatments, respectively. Data for grain yield showed that the insecticide - hybrid interaction was significant and imidacloprid was generally the most effective in the field experiments. A negative correlation was observed between the mean disease severity index and mean grain yield. The results suggest that if an effective systemic insecticide is applied as a seed coating, it may be possible to obtain good control of D. kuscheli, decrease MRCV severity and increase grain yield under field conditions in areas at risk for MRCV.
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Claims 9
Claim · model-written summary
In laboratory tests carbofuran was the most effective seed-treatment insecticide against the planthopper Delphacodes kuscheli, followed by imidacloprid and acephate, independently of the maize hybrid.
- Treatment
- Carbofurane1
- Interactor
- Delphacodes kuscheliDelphacodes kuschelie0pest
- Outcome
- most effective insecticidee1
- Direction
- most effectivee1
- Comparator
- imidacloprid and acephatee1
- Setting
- laboratory testse1
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Control of the Mal de Río Cuarto virus (MRCV) and its planthopper vector Delphacodes kuscheli was studied on maize hybrids”
e1“Carbofuran was the most effective insecticide in laboratory tests, independently of the hybrid tested, followed by imidacloprid and acephate”
Claim · model-written summary
MRCV incidences were high in all insecticide treatments in the field test under natural planthopper infestations.
- Interactor
- MRCVMal de Rio Cuarto viruse1pathogen
- Outcome
- MRCV incidencese1
- Direction
- highe1
- Setting
- field teste1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maize hybrids whose seeds had been treated with systemic insecticides”
e1“MRCV incidences were high in all treatments in the field test under natural planthopper infestations”
Claim · model-written summary
The insecticide by hybrid interaction for MRCV disease severity was not significant.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maize hybrids whose seeds had been treated with systemic insecticides”
e1“Disease severity data analysis indicated that the insecticide - hybrid interaction was not significant”
Claim · model-written summary
Maize hybrid Dekalb 664 had the lowest disease severity mean among the four hybrids.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maize hybrid Dekalb 664 and the imidacloprid treatments had the lowest severity means among the four hybrids and three insecticide treatments, respectively”
Claim · model-written summary
Imidacloprid treatment had the lowest disease severity mean among the three insecticide treatments.
- Treatment
- imidaclopride0
- Outcome
- severity meanse0
- Direction
- loweste0
- Comparator
- three insecticide treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maize hybrid Dekalb 664 and the imidacloprid treatments had the lowest severity means among the four hybrids and three insecticide treatments, respectively”
Claim · model-written summary
The insecticide by hybrid interaction for grain yield was significant.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maize hybrids whose seeds had been treated with systemic insecticides”
e1“Data for grain yield showed that the insecticide - hybrid interaction was significant”
Claim · model-written summary
Imidacloprid was generally the most effective insecticide treatment for grain yield in the field experiments.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maize hybrids whose seeds had been treated with systemic insecticides”
e1“Data for grain yield showed that the insecticide - hybrid interaction was significant and imidacloprid was generally the most effective in the field experiments”
Claim · model-written summary
Mean disease severity index was negatively correlated with mean grain yield.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maize hybrids whose seeds had been treated with systemic insecticides”
e1“A negative correlation was observed between the mean disease severity index and mean grain yield”
Claim · model-written summary
The authors suggest that an effective systemic insecticide applied as a seed coating may give good control of D. kuscheli, decrease MRCV severity and increase grain yield under field conditions in areas at risk.
- Treatment
- effective systemic insecticide is applied as a seed coatinge1
- Interactor
- D. kuscheliDelphacodes kuschelie1pest
- Outcome
- good control of D. kuscheli, decrease MRCV severity and increase grain yielde1
- Setting
- field conditionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maize hybrids whose seeds had been treated with systemic insecticides”
e1“if an effective systemic insecticide is applied as a seed coating, it may be possible to obtain good control of D. kuscheli, decrease MRCV severity and increase grain yield under field conditions”
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See all 21 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.