Abstract
The sugarcane aphid, Melanaphis sacchari (Zehntner) (Hemiptera: Aphididae), has become a major pest of grain sorghum, Sorghum bicolor (L.) Moench, in the United States in recent years. Feeding by large densities of sugarcane aphids causes severe damage, which can lead to a total loss of yield in extreme cases. Our objective was to determine the effect of grain sorghum planting date on sugarcane aphid population dynamics and their potential to reduce yields. We conducted field experiments from 2015 to 2017 in which an aphid-susceptible grain sorghum hybrid was planted at four different dates, which encompassed the typical range of planting dates used in Arkansas production systems. Plots were either protected from sugarcane aphid feeding using foliar insecticide sprays, or left untreated to allow natural populations of sugarcane aphids to colonize and reproduce freely. Planting date impacted both the magnitude and severity of sugarcane aphid infestations, with the highest population densities (and subsequent reductions in sorghum yield) generally occurring on plots that were planted in May or June. Sugarcane aphid feeding reduced yields in the untreated plots in two of the four planting date categories we tested. Earlier planting generally resulted in less sugarcane aphid damage and improved yields compared with later planting dates. While the effect of planting date on sugarcane aphid populations is likely to vary by region, sorghum producers should consider grain sorghum planting date as a potential cultural tactic to reduce the impact of sugarcane aphid.
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Claims 6
Claim · model-written summary
May or June planting generally had the highest sugarcane aphid densities.
- Taxon
- grain sorghum
Sorghum bicolore2 - Treatment
- planted in May or Junee0
- Interactor
- sugarcane aphide1pest
- Outcome
- population densitiese0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest population densities (and subsequent reductions in sorghum yield) generally occurring on plots that were planted in May or June”
e1“sugarcane aphid, Melanaphis sacchari”
e2“grain sorghum, Sorghum bicolor”
Claim · model-written summary
May or June planting generally had subsequent sorghum yield reductions.
- Taxon
- grain sorghumSorghum bicolore2
- Treatment
- planted in May or Junee0
- Interactor
- sugarcane aphide1pest
- Outcome
- sorghum yielde0
- Direction
- reductionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest population densities (and subsequent reductions in sorghum yield) generally occurring on plots that were planted in May or June”
e1“sugarcane aphid, Melanaphis sacchari”
e2“grain sorghum, Sorghum bicolor”
Claim · model-written summary
Aphid feeding reduced untreated plot yields in two of four planting date categories.
- Taxon
- grain sorghumSorghum bicolore1
- Treatment
- Sugarcane aphid feedinge0
- Interactor
- Sugarcane aphide0pest
- Outcome
- yieldse0
- Direction
- reducede0
- Qualifier
- two of the four planting date categoriese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugarcane aphid feeding reduced yields in the untreated plots in two of the four planting date categories we tested.”
e1“grain sorghum, Sorghum bicolor”
Claim · model-written summary
Earlier planting generally reduced aphid damage relative to later planting.
- Taxon
- grain sorghumSorghum bicolore1
- Treatment
- Earlier plantinge0
- Interactor
- sugarcane aphide0pest
- Outcome
- sugarcane aphid damagee0
- Direction
- lesse0
- Comparator
- later planting datese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Earlier planting generally resulted in less sugarcane aphid damage and improved yields compared with later planting dates.”
e1“grain sorghum, Sorghum bicolor”
Claim · model-written summary
Earlier planting generally improved yields relative to later planting.
- Taxon
- grain sorghumSorghum bicolore1
- Treatment
- Earlier plantinge0
- Outcome
- yieldse0
- Direction
- improvede0
- Comparator
- later planting datese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Earlier planting generally resulted in less sugarcane aphid damage and improved yields compared with later planting dates.”
e1“grain sorghum, Sorghum bicolor”
Claim · model-written summary
Producers should consider planting date to reduce sugarcane aphid impact.
- Taxon
- grain sorghumSorghum bicolore1
- Interactor
- sugarcane aphide0pest
- Outcome
- grain sorghum planting date as a potential cultural tactic to reduce the impact of sugarcane aphide0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sorghum producers should consider grain sorghum planting date as a potential cultural tactic to reduce the impact of sugarcane aphid.”
e1“grain sorghum, Sorghum bicolor”
The same questions in other papers
infection · yield · Sorghum bicolor (sorghum)Results agree
3 papers in the same direction as this paper
- no effect
- negative
- no effect
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.