Abstract
Southern corn rootworm, Diabrotica undecimpunctata howardi Barber, can cause severe stand loss in reduced tillage corn after a vetch cover crop. Trials conducted over 3 yr found that clothianidin and thiamethoxam neonicotinoid seed treatments and conventional granular insecticides applied in-furrow or as a T-band were very effective against southern corn rootworm. Treatments were categorized as no control (untreated), partial control, and full control based on the extent of seedling injury. In 2 yr, damaged plants were individually marked and their survival, tiller (i.e., secondary stem) production, and ear and grain weight measured. About one-half of plants injured by larvae produced a tiller, with most plants producing tillers within 30 d after planting. All dead-hearted plants not producing a tiller died and were not evident by mid-season. In no control plots with severe damage, healthy plants produced more ears per plant and secondarily more grain weight per plant than healthy plants in full control plots. Plants with early tillers in no control produced approximately 38% of the grain weight of healthy plants compared with only approximately 6% in full control plots, whereas plants with late tillers in no control plots produced < 10% of the grain weight of healthy plants and produced no grain in full control plots. Therefore, in stands with severe seedling damage, remaining healthy plants and damaged plants producing a tiller within 30 d of planting responded to lower plant population by producing more ears and grain per plant. However, in full control plots with low levels of damage, damaged plants producing a tiller often persisted until harvest but produced very little grain thereby acting as weeds with the stand.
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Claims 12
Claim · model-written summary
Clothianidin seed treatment was very effective against southern corn rootworm.
- Taxon
- corn
Zea mays subsp. mayst0 - Treatment
- clothianidine0
- Interactor
- southern corn rootworme0pest
- Outcome
- southern corn rootworme0
- Direction
- very effectivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“clothianidin and thiamethoxam neonicotinoid seed treatments and conventional granular insecticides applied in-furrow or as a T-band were very effective against southern corn rootworm”
t0“Corn Stand”
Claim · model-written summary
Thiamethoxam seed treatment was very effective against southern corn rootworm.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- thiamethoxame0
- Interactor
- southern corn rootworme0pest
- Outcome
- southern corn rootworme0
- Direction
- very effectivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“clothianidin and thiamethoxam neonicotinoid seed treatments and conventional granular insecticides applied in-furrow or as a T-band were very effective against southern corn rootworm”
t0“Corn Stand”
Claim · model-written summary
Granular insecticides applied in-furrow or as a T-band were very effective against southern corn rootworm.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- conventional granular insecticides applied in-furrow or as a T-bande0
- Interactor
- southern corn rootworme0pest
- Outcome
- southern corn rootworme0
- Direction
- very effectivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“conventional granular insecticides applied in-furrow or as a T-band were very effective against southern corn rootworm”
t0“Corn Stand”
Claim · model-written summary
About half of larva-injured plants produced a tiller, usually within 30 days of planting.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- produced a tillere0
- Value
- one-halfe0
- Qualifier
- within 30 d after plantinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“About one-half of plants injured by larvae produced a tiller, with most plants producing tillers within 30 d after planting”
t0“Corn Stand”
Claim · model-written summary
Dead-hearted plants without a tiller died by mid-season.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- diede0
- Qualifier
- not producing a tillere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All dead-hearted plants not producing a tiller died and were not evident by mid-season”
t0“Corn Stand”
Claim · model-written summary
Healthy plants in severely damaged no-control plots produced more ears than healthy plants in full-control plots.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- ears per plante0
- Direction
- moree0
- Comparator
- healthy plants in full control plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“healthy plants produced more ears per plant and secondarily more grain weight per plant than healthy plants in full control plots”
t0“Corn Stand”
Claim · model-written summary
Healthy plants in severely damaged no-control plots had more grain weight per plant than healthy plants in full-control plots.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- grain weight per plante0
- Direction
- moree0
- Comparator
- healthy plants in full control plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“healthy plants produced more ears per plant and secondarily more grain weight per plant than healthy plants in full control plots”
t0“Corn Stand”
Claim · model-written summary
Early-tiller plants in no-control plots produced about 38% of healthy-plant grain weight.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- grain weighte0
- Value
- approximately 38%e0
- Comparator
- healthy plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants with early tillers in no control produced approximately 38% of the grain weight of healthy plants”
t0“Corn Stand”
Claim · model-written summary
Early-tiller plants in full-control plots produced about 6% of healthy-plant grain weight.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- grain weighte0
- Value
- approximately 6%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain weight of healthy plants compared with only approximately 6% in full control plots”
t0“Corn Stand”
Claim · model-written summary
Late-tiller plants in no-control plots produced under 10% of healthy-plant grain weight.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- grain weighte0
- Value
- < 10%e0
- Comparator
- healthy plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants with late tillers in no control plots produced < 10% of the grain weight of healthy plants”
t0“Corn Stand”
Claim · model-written summary
Late-tiller plants in full-control plots produced no grain.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- no graine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“produced no grain in full control plots”
t0“Corn Stand”
Claim · model-written summary
In full-control plots, tillering damaged plants often persisted until harvest while producing very little grain.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- very little graine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“damaged plants producing a tiller often persisted until harvest but produced very little grain”
t0“Corn Stand”
The same questions in other papers
clothianidin · organism · Zea mays (maize)Positive and negative results
1 in the opposite direction
- negative
insecticide · organism · Zea mays (maize)Positive and negative results
4 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
2 papers more in this group
See all 6 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.