Abstract
Abstract The western corn rootworm (WCR) ( Diabrotica virgifera virgifera Le‐Conte) has become a serious pest of continuous corn ( Zea mays L.) in the northeastern USA. Several recommended crop production practices in this area, such as early planting, sidedressing N applications, and no‐till, often contribute to slow early‐season growth, which could affect the potential for damage from the WCR. The objective of this study was to determine if these practices affected root damage ratings or yield reductions associated with the WCR. Field experiments were conducted in 1991, 1992, and 1993 on well‐drained Hagerstown silt loam soils (fine, mixed, mesic Typic Hapludalfs). Treatments in each study were factorial combinations of two tillage treatments( nonea nd chisel‐disk), three timings of N fertilizer application (at planting, sidedressed, or split), two planting dates (early and late May), and two insecticide treatments (none and 1.12 kg ha −1 chlorpyrifos). Each treatment was replicated four times. Lodging, root damage ratings, root dry matter estimates, and grain and silage yields were measured for each treatment. Root damage ratings were not affected by the planting date, N timing, or the tillage system. Insecticide had a large and consistent effect on reducing root damage from the WCR. Root size estimates indicates that late planting reduced root size but did not affect root damage. These results indicate that reduced tillage, N sidedressing, and early planting can be included in an integrated pest management program with no risk of increasing the potential for root damage from the western corn rootworm.
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Claims 6
Claim · model-written summary
Root damage ratings from western corn rootworm were not affected by planting date.
- Taxon
- corn
Zea mays subsp. mayse3 - Treatment
- planting datee1
- Interactor
- western corn rootworm
Diabrotica virgifera virgiferae2pest - Outcome
- root damage ratingse1
- Direction
- not affectede1
- Setting
- Field experimentse4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Root damage ratings were not affected by the planting date, N timing, or the tillage system”
e2“The western corn rootworm (WCR)”
e3“has become a serious pest of continuous corn ( Zea mays L.)”
e4“Field experiments were conducted in 1991, 1992, and 1993”
Claim · model-written summary
Root damage ratings from western corn rootworm were not affected by nitrogen timing.
- Taxon
- cornZea mays subsp. mayse3
- Treatment
- N timinge1
- Interactor
- western corn rootwormDiabrotica virgifera virgiferae2pest
- Outcome
- root damage ratingse1
- Direction
- not affectede1
- Setting
- Field experimentse4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Root damage ratings were not affected by the planting date, N timing, or the tillage system”
e2“The western corn rootworm (WCR)”
e3“has become a serious pest of continuous corn ( Zea mays L.)”
e4“Field experiments were conducted in 1991, 1992, and 1993”
Claim · model-written summary
Root damage ratings from western corn rootworm were not affected by tillage system.
- Taxon
- cornZea mays subsp. mayse3
- Treatment
- tillage systeme1
- Interactor
- western corn rootwormDiabrotica virgifera virgiferae2pest
- Outcome
- root damage ratingse1
- Direction
- not affectede1
- Setting
- Field experimentse4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Root damage ratings were not affected by the planting date, N timing, or the tillage system”
e2“The western corn rootworm (WCR)”
e3“has become a serious pest of continuous corn ( Zea mays L.)”
e4“Field experiments were conducted in 1991, 1992, and 1993”
Claim · model-written summary
Insecticide reduced root damage from the western corn rootworm in corn, with a large and consistent effect.
- Taxon
- cornZea mays subsp. mayse3
- Treatment
- Insecticidee5
- Interactor
- WCRe5pest
- Outcome
- root damagee5
- Direction
- reducinge5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“has become a serious pest of continuous corn ( Zea mays L.)”
e5“Insecticide had a large and consistent effect on reducing root damage from the WCR”
Claim · model-written summary
Late planting reduced corn root size.
- Taxon
- cornZea mays subsp. mayse3
- Treatment
- late plantinge6
- Outcome
- root sizee6
- Direction
- reducede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“has become a serious pest of continuous corn ( Zea mays L.)”
e6“Root size estimates indicates that late planting reduced root size but did not affect root damage”
Claim · model-written summary
Reduced tillage, N sidedressing and early planting can be included in an integrated pest management program without risk of increasing root damage from the western corn rootworm.
- Taxon
- cornZea mays subsp. mayse3
- Treatment
- reduced tillage, N sidedressing, and early plantinge6
- Interactor
- western corn rootwormDiabrotica virgifera virgiferae6pest
- Outcome
- root damagee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“has become a serious pest of continuous corn ( Zea mays L.)”
e6“These results indicate that reduced tillage, N sidedressing, and early planting can be included in an integrated pest management program with no risk of increasing the potential for root damage from the western corn rootworm”
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See all 65 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.