Abstract
Conflicting results have been reported on the ability of glandular-haired alfalfa (Medicago sativa L.) cultivars to reduce potato leafhopper, Empoasca fabae Harris, population abundance in field environments. We measured potato leafhopper adult and nymph abundance and yield responses in a cultivar selected for high potato leafhopper resistance ('54H91') and in a non-glandular-haired susceptible cultivar ('54V54') with and without insecticide treatment across 3 yr. Treatments included no insecticide and insecticide applied either early or late in each summer growth cycle. Date × cultivar × treatment interactions were found for potato leafhopper population abundance. In the absence of insecticides, total potato leafhopper abundance (adults + nymphs per sweep) was lower in 54H91 than in 54V54 on 85% of sampling dates; cultivar differences were especially evident as potato leafhopper abundance peaked. Insecticide treatment reduced potato leafhopper populations in both cultivars, but populations recovered and often exceeded the normal action threshold in both cultivars within 2-3 wk of insecticide application. Yield gain from early insecticide treatment of 54V54 was >400 kg/ha in 11 of 14 summer harvests, whereas in 54H91 the yield gain was <250 kg/ha in 10 of 14 summer harvests. We conclude that glandular-haired alfalfa cultivars with high levels of potato leafhopper resistance significantly suppress potato leafhopper adult and nymph abundance, reduce yield losses in the absence of insecticides, and have potential within an integrated pest management strategy to reduce insecticide use in alfalfa production systems.
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 8
Claim · model-written summary
Without insecticide, potato leafhopper abundance was lower in 54H91 than in 54V54 on 85% of sampling dates.
- Taxon
- alfalfa
Medicago sativae0 - Material
- 54H91e1
- Treatment
- absence of insecticidese1
- Interactor
- Empoasca fabae
Empoasca fabaee0pest - Outcome
- total potato leafhopper abundancee1
- Direction
- lowere1
- Value
- 85% of sampling datese1
- Comparator
- 54V54e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Conflicting results have been reported on the ability of glandular-haired alfalfa (Medicago sativa L.) cultivars to reduce potato leafhopper, Empoasca fabae Harris, population abundance in field environments”
e1“In the absence of insecticides, total potato leafhopper abundance (adults + nymphs per sweep) was lower in 54H91 than in 54V54 on 85% of sampling dates”
Claim · model-written summary
Insecticide treatment reduced potato leafhopper populations in both cultivars.
- Taxon
- alfalfaMedicago sativae0
- Material
- both cultivarse2
- Treatment
- Insecticide treatmente2
- Interactor
- Empoasca fabaeEmpoasca fabaee0pest
- Outcome
- potato leafhopper populationse2
- Direction
- reducede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Conflicting results have been reported on the ability of glandular-haired alfalfa (Medicago sativa L.) cultivars to reduce potato leafhopper, Empoasca fabae Harris, population abundance in field environments”
e2“Insecticide treatment reduced potato leafhopper populations in both cultivars”
Claim · model-written summary
Leafhopper populations recovered and often exceeded the action threshold within 2-3 weeks of insecticide application.
- Taxon
- alfalfaMedicago sativae0
- Interactor
- Empoasca fabaeEmpoasca fabaee0pest
- Outcome
- populations recovered and often exceeded the normal action thresholde3
- Qualifier
- within 2-3 wk of insecticide applicatione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Conflicting results have been reported on the ability of glandular-haired alfalfa (Medicago sativa L.) cultivars to reduce potato leafhopper, Empoasca fabae Harris, population abundance in field environments”
e3“populations recovered and often exceeded the normal action threshold in both cultivars within 2-3 wk of insecticide application”
Claim · model-written summary
Early insecticide treatment of 54V54 gained more than 400 kg/ha yield in 11 of 14 summer harvests.
- Taxon
- alfalfaMedicago sativae0
- Material
- 54V54e4
- Treatment
- early insecticide treatmente4
- Outcome
- Yield gaine4
- Direction
- increaseinferrede4
- Value
- >400 kg/hae4
- Qualifier
- in 11 of 14 summer harvestse4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Conflicting results have been reported on the ability of glandular-haired alfalfa (Medicago sativa L.) cultivars to reduce potato leafhopper, Empoasca fabae Harris, population abundance in field environments”
e4“Yield gain from early insecticide treatment of 54V54 was >400 kg/ha in 11 of 14 summer harvests”
Claim · model-written summary
Early insecticide treatment gained less than 250 kg/ha yield for 54H91 than for 54V54 in 10 of 14 summer harvests.
- Taxon
- alfalfaMedicago sativae0
- Material
- 54H91e5
- Treatment
- early insecticide treatmente4
- Outcome
- yield gaine5
- Direction
- lowerinferrede5
- Value
- <250 kg/hae5
- Qualifier
- in 10 of 14 summer harvestse5
- Comparator
- 54V54e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Conflicting results have been reported on the ability of glandular-haired alfalfa (Medicago sativa L.) cultivars to reduce potato leafhopper, Empoasca fabae Harris, population abundance in field environments”
e4“Yield gain from early insecticide treatment of 54V54 was >400 kg/ha in 11 of 14 summer harvests”
e5“whereas in 54H91 the yield gain was <250 kg/ha in 10 of 14 summer harvests”
Claim · model-written summary
Glandular-haired alfalfa cultivars with high resistance significantly suppress potato leafhopper adult and nymph abundance.
- Taxon
- alfalfaMedicago sativae0
- Material
- glandular-haired alfalfa cultivarse6
- Interactor
- Empoasca fabaeEmpoasca fabaee0pest
- Outcome
- potato leafhopper adult and nymph abundancee6
- Direction
- significantly suppresse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Conflicting results have been reported on the ability of glandular-haired alfalfa (Medicago sativa L.) cultivars to reduce potato leafhopper, Empoasca fabae Harris, population abundance in field environments”
e6“glandular-haired alfalfa cultivars with high levels of potato leafhopper resistance significantly suppress potato leafhopper adult and nymph abundance”
Claim · model-written summary
Glandular-haired alfalfa cultivars reduce yield losses in the absence of insecticides.
- Taxon
- alfalfaMedicago sativae0
- Material
- glandular-haired alfalfa cultivarse6
- Treatment
- absence of insecticidese7
- Outcome
- yield lossese7
- Direction
- reducee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Conflicting results have been reported on the ability of glandular-haired alfalfa (Medicago sativa L.) cultivars to reduce potato leafhopper, Empoasca fabae Harris, population abundance in field environments”
e6“glandular-haired alfalfa cultivars with high levels of potato leafhopper resistance significantly suppress potato leafhopper adult and nymph abundance”
e7“reduce yield losses in the absence of insecticides”
Claim · model-written summary
Glandular-haired alfalfa resistance has potential within an integrated pest management strategy to reduce insecticide use.
- Taxon
- alfalfaMedicago sativae1
- Outcome
- reduce insecticide usee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“have potential within an integrated pest management strategy to reduce insecticide use in alfalfa production systems”
The same questions in other papers
insecticide · yield · Medicago sativa (alfalfa)Results differ
16 papers in the same direction as this paper · 7 in the opposite direction · 1 reporting no difference from an alternative
- negative
- positive
- positive
21 papers more in this group
See all 25 papers →insecticide · Empoasca fabae · Medicago sativa (alfalfa)Results agree
1 paper in the same direction as this paper
- positive
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.