Abstract
Rotations, tillage, and fertilizer treatments can affect yield, costs, and profitability in sorghum, Sorghum bicolor (L.) Moench, depending on their effects on pests. Rotation or planting different crops reduces soil erosion and pests that build up when a field is planted to the same crop each year. Minimum tillage reduces the number of trips over a field, lessening soil compaction and reducing costs. We examined the effects of fertilizer, tillage, and rotation with cotton, Gossypium hirsutum L., on sorghum head insects during three sampling periods each year from 2000 to 2003. We found that fertilizer treatments did not affect pests or predators. Also, predators were unaffected by rotation and tillage, which some years affected Helicoverpa zea (Boddie) and Oebalus pugnax (F.), both pests that feed on developing sorghum kernels, thereby reducing yield. In 2000, H. zea densities were greater in continuous sorghum, regardless of tillage practice, than in sorghum-cotton rotation. However, in 2003, H. zea densities were greater in minimum tillage plots within sorghum- cotton rotation than minimum tillage plots within continuous sorghum. In 2000, in sorghum- cotton rotation, O. pugnax densities were greater in minimum tillage than conventional tillage plots, whereas in continuous sorghum the opposite was true, O. pugnax were greater in conventional tillage. Also, O. pugnax were greater in sorghum- cotton rotation than in continuous sorghum. In 2002, O. pugnax densities were greater in conventional than minimum tillage plots. These results suggest that rotation of sorghum with cotton can sometimes reduce H. zea, but this reduction may occur with increased density of O. pugnax. Also, reducing tillage may reduce O. pugnax in some instances.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 10
Claim · model-written summary
Fertilizer treatments did not affect sorghum pests or predators.
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fertilizer treatments did not affect pests or predators”
t0“Sorghum Head Insects”
Claim · model-written summary
Rotation and tillage did not affect predators.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“predators were unaffected by rotation and tillage”
t0“Sorghum Head Insects”
Claim · model-written summary
In 2000, H. zea density was greater in continuous sorghum than in sorghum-cotton rotation regardless of tillage.
- Treatment
- continuous sorghume0
- Interactor
- H. zea
.jpg?width=60)
Helicoverpa zeae0pest - Outcome
- H. zea densitiese0
- Direction
- greatere0
- Qualifier
- In 2000e0
- Comparator
- sorghum-cotton rotatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“In 2000, H. zea densities were greater in continuous sorghum, regardless of tillage practice, than in sorghum-cotton rotation”
t0“Sorghum Head Insects”
Claim · model-written summary
In 2003, H. zea density under minimum tillage was greater in sorghum-cotton rotation than continuous sorghum.
- Treatment
- sorghum- cotton rotatione0
- Interactor
- H. zeaHelicoverpa zeae0pest
- Outcome
- H. zea densitiese0
- Direction
- greatere0
- Qualifier
- minimum tillage plotse0
- Comparator
- continuous sorghume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in 2003, H. zea densities were greater in minimum tillage plots within sorghum- cotton rotation than minimum tillage plots within continuous sorghum”
t0“Sorghum Head Insects”
Claim · model-written summary
In 2000 rotation plots, O. pugnax density was greater with minimum than conventional tillage.
- Treatment
- minimum tillagee0
- Interactor
- O. pugnax
.jpg?width=60)
Oebalus pugnaxe0pest - Outcome
- O. pugnax densitiese0
- Direction
- greatere0
- Qualifier
- sorghum- cotton rotatione0
- Comparator
- conventional tillagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“In 2000, in sorghum- cotton rotation, O. pugnax densities were greater in minimum tillage than conventional tillage plots”
t0“Sorghum Head Insects”
Claim · model-written summary
In 2000 continuous sorghum, O. pugnax was greater with conventional than minimum tillage.
- Treatment
- conventional tillagee0
- Interactor
- O. pugnaxOebalus pugnaxe0pest
- Outcome
- O. pugnaxe0
- Direction
- greatere0
- Qualifier
- continuous sorghume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in continuous sorghum the opposite was true, O. pugnax were greater in conventional tillage”
t0“Sorghum Head Insects”
Claim · model-written summary
O. pugnax density was greater in sorghum-cotton rotation than continuous sorghum.
- Treatment
- sorghum- cotton rotatione0
- Interactor
- O. pugnaxOebalus pugnaxe0pest
- Outcome
- O. pugnaxe0
- Direction
- greatere0
- Comparator
- continuous sorghume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“O. pugnax were greater in sorghum- cotton rotation than in continuous sorghum”
t0“Sorghum Head Insects”
Claim · model-written summary
In 2002, O. pugnax density was greater with conventional than minimum tillage.
- Treatment
- conventionale0
- Interactor
- O. pugnaxOebalus pugnaxe0pest
- Outcome
- O. pugnax densitiese0
- Direction
- greatere0
- Comparator
- minimum tillagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2002, O. pugnax densities were greater in conventional than minimum tillage plots”
t0“Sorghum Head Insects”
Claim · model-written summary
The authors concluded sorghum-cotton rotation can sometimes reduce H. zea while increasing O. pugnax.
- Interactor
- H. zeaHelicoverpa zeae0pest
- Second interactor
- O. pugnaxOebalus pugnaxe0pest
- Outcome
- rotation of sorghum with cottone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rotation of sorghum with cotton can sometimes reduce H. zea, but this reduction may occur with increased density of O. pugnax”
Claim · model-written summary
The authors concluded reduced tillage may sometimes reduce O. pugnax.
- Interactor
- O. pugnaxOebalus pugnaxe0pest
- Outcome
- reducing tillagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reducing tillage may reduce O. pugnax”
t0“Sorghum Head Insects”
The same questions in other papers
fertilization · pest · SorghumPositive and negative results
1 paper in the same direction as this paper · 5 in the opposite direction
- positive
- positive
- positive
3 papers more in this group
See all 7 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.