Abstract
We examined the effects of strip-intercropping soybean, Glycine max, and sorghum, Sorghum bicolor, on rates of insect parasitism and fungal disease incidence in larvae of the green cloverworm, Plathypena scabra (F.), a widespread and occasionally serious pest of soybeans, during an endemic year. A completely randomized design with two cropping systems (monocropped soybean and soybean intercropped with sorghum), two sorghum heights (dwarf sorghum ≈1 m in height; tall sorghum ≈2 m in height), and two row patterns (2 rows of sorghum alternating with 10 rows of soybean; 6 rows of sorghum alternating with 6 rows of soybean) was used. Abundance (number per row-meter) of P. scabra larvae, rates of larval parasitism and incidence of the entomopathogenic fungus, Nomuraea rileyi (Farlow) Sampson did not differ significantly among treatments or their interaction. Soybean yield (grams dry weight of beans per row-meter) did not differ significantly among treatments but sorghum grain yield and biomass (grams dry weight per row-meter) were significantly lower in dwarf sorghum planted in wide rows because of competing weed populations. Results suggest that neither the accrual of P. scabra larvae in soybean nor the impact of the parasitoid-pathogen complex on P. scabra mortality is affected by structural or taxonomic agroecosystem diversification at the scale studied. n
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Claims 5
Claim · model-written summary
Green cloverworm larval abundance did not differ significantly among cropping treatments.
- Taxon
- soybean
Glycine maxt0 - Treatment
- soybean intercropped with sorghume1
- Interactor
- P. scabrae0pest
- Outcome
- Abundance (number per row-meter) of P. scabra larvaee0
- Direction
- did not differe0
- Comparator
- monocropped soybeane1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Abundance (number per row-meter) of P. scabra larvae, rates of larval parasitism and incidence of the entomopathogenic fungus, Nomuraea rileyi (Farlow) Sampson did not differ significantly among treatments or their interaction.”
t0“soybean”
e1“monocropped soybean and soybean intercropped with sorghum”
Claim · model-written summary
Green cloverworm larval parasitism rates did not differ significantly among treatments.
- Taxon
- soybeanGlycine maxt0
- Treatment
- soybean intercropped with sorghume1
- Interactor
- Plathypena scabrae2pest
- Outcome
- rates of larval parasitisme0
- Direction
- did not differe0
- Comparator
- monocropped soybeane1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rates of larval parasitism and incidence of the entomopathogenic fungus, Nomuraea rileyi (Farlow) Sampson did not differ significantly among treatments or their interaction.”
t0“soybean”
e1“monocropped soybean and soybean intercropped with sorghum”
e2“larvae of the green cloverworm, Plathypena scabra”
Claim · model-written summary
Soybean yield did not differ significantly among treatments.
- Taxon
- SoybeanGlycine maxe0
- Treatment
- soybean intercropped with sorghume1
- Outcome
- Soybean yielde0
- Direction
- did not differe0
- Comparator
- monocropped soybeane1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean yield (grams dry weight of beans per row-meter) did not differ significantly among treatments”
e1“monocropped soybean and soybean intercropped with sorghum”
Claim · model-written summary
Dwarf sorghum planted in wide rows had significantly lower grain yield because of competing weeds.
- Treatment
- dwarf sorghum planted in wide rowse0
- Interactor
- weed populationse0weed
- Outcome
- sorghum grain yielde0
- Direction
- lowere0
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sorghum grain yield and biomass (grams dry weight per row-meter) were significantly lower in dwarf sorghum planted in wide rows because of competing weed populations.”
Claim · model-written summary
Dwarf sorghum planted in wide rows had significantly lower biomass because of competing weeds.
- Treatment
- dwarf sorghum planted in wide rowse0
- Interactor
- weed populationse0weed
- Outcome
- biomasse0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sorghum grain yield and biomass (grams dry weight per row-meter) were significantly lower in dwarf sorghum planted in wide rows because of competing weed populations.”
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