Abstract
ABSTRACT Field studies were conducted at the Haskell Agricultural Laboratory, University of Nebraska, Concord, NE during 1996, 1997, and 1999 to evaluate the effects of manure application, hybrid root strength, and reduced insecticide rates on corn rootworm (Diabrotica virgifera virgifera LeConte and D. barberi Smith and Lawrence) larval injury and corn (Zea mays L.) yield. Treatment combinations consisted of two corn hybrids, three manure rates (0, 67, and 135 MT/ha), and 4 in secticide rates (0, 2.8, 5.6, and 11.2 g (AI)/100 m-row terbufos, T-band). Overall, manure reduced root injury 7% to 11% and increased yield 1% to 8%. All insecticide rates reduced root injury, but did not affect yield. When manure was combined with insecticide applications, there was no significant increase in root injury protection over that provided by the insecticide. Hybrid root strength did not contribute to root or yield protection. Root injury was relatively low during all years of the study (control root ratings < 4). Manure application did not interfere with the terbofos application. More detailed studies are required to characterize the effects and joint effects of manure application, hybrid root strength, and reduced insecticide rates on rootworm feeding and plant response.
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Claims 9
Claim · model-written summary
Manure reduced corn root injury by 7% to 11%.
- Taxon
- Corn
Zea mays subsp. mayst0 - Treatment
- manuree0
- Interactor
- Corn Rootwormt1pest
- Outcome
- root injurye0
- Direction
- reducede0
- Value
- 7% to 11%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Overall, manure reduced root injury 7% to 11%”
t0“Injury to Corn”
t1“Corn Rootworm”
Claim · model-written summary
Manure increased corn yield by 1% to 8%.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- manuree0
- Interactor
- Corn Rootwormt1pest
- Outcome
- yielde0
- Direction
- increasede0
- Value
- 1% to 8%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“manure reduced root injury 7% to 11% and increased yield 1% to 8%”
t0“Injury to Corn”
t1“Corn Rootworm”
Claim · model-written summary
Every insecticide rate reduced root injury.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- insecticide ratese0
- Interactor
- Corn Rootwormt1pest
- Outcome
- root injurye0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All insecticide rates reduced root injury”
t0“Injury to Corn”
t1“Corn Rootworm”
Claim · model-written summary
Insecticide rates did not affect corn yield.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- insecticide ratese0
- Outcome
- yielde0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All insecticide rates reduced root injury, but did not affect yield.”
t0“Injury to Corn”
Claim · model-written summary
Combining manure and insecticide did not significantly improve root injury protection over insecticide alone.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- manure was combined with insecticide applicationse0
- Interactor
- Corn Rootwormt1pest
- Outcome
- root injury protectione0
- Direction
- no significant increasee0
- Comparator
- the insecticidee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When manure was combined with insecticide applications, there was no significant increase in root injury protection over that provided by the insecticide.”
t0“Injury to Corn”
t1“Corn Rootworm”
Claim · model-written summary
Hybrid root strength did not protect corn roots.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- Hybrid root strengthe0
- Interactor
- Corn Rootwormt1pest
- Outcome
- root or yield protectione0
- Direction
- did not contributee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hybrid root strength did not contribute to root or yield protection.”
t0“Injury to Corn”
t1“Corn Rootworm”
Claim · model-written summary
Hybrid root strength did not protect corn yield.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- Hybrid root strengthe0
- Outcome
- yield protectione0
- Direction
- did not contributee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hybrid root strength did not contribute to root or yield protection.”
t0“Injury to Corn”
Claim · model-written summary
Control root injury ratings were below 4 in all study years.
- Taxon
- CornZea mays subsp. mayst0
- Interactor
- Corn Rootwormt1pest
- Outcome
- control root ratingse0
- Direction
- relatively lowe0
- Value
- < 4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root injury was relatively low during all years of the study (control root ratings < 4).”
t0“Injury to Corn”
t1“Corn Rootworm”
Claim · model-written summary
Manure did not interfere with terbufos application.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- Manure applicatione0
- Outcome
- terbofos applicatione0
- Direction
- did not interferee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Manure application did not interfere with the terbofos application.”
t0“Injury to Corn”
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