Abstract
ABSTRACT There are conflicting reports on effectiveness of glandular‐haired alfalfa ( Medicago sativa L.) cultivars for reducing plant injury caused by potato leafhopper (PLH), Empoasca fabae Harris (Hemiptera: Cicadellidae). We measured forage yield and nutritive value in a glandular‐haired cultivar rated as highly resistant to PLH (54H91) and a nonglandular‐haired susceptible cultivar (54V54), both grown with and without an insecticide applied either early or late in each summer growth cycle across 3 yr. Cultivar × insecticide treatment interactions ( P ≤ 0.01 and 0.14) were found for cumulative yield across years in two experiments. With the early insecticide treatment on 54H91, forage yield was up to 6% greater ( P = 0.03) than without insecticide, while the susceptible 54V54 yielded 17 to 37% more ( P < 0.01) with the early treatment than without insecticide. Crude protein (CP) of 54V54 in summer averaged 10 to 22 g kg −1 lower ( P < 0.05) for the untreated than with early insecticide treatment, but consistent differences in forage fiber content or fiber digestibility were not observed. Cumulative forage yield across all harvests or across summer harvests in the untreated 54H91 were similar to yield of the late insecticide‐treated susceptible 54V54. The glandular‐haired alfalfa cultivar suppressed PLH abundance and reduced yield losses caused by this pest in the absence of insecticide applications. Glandular‐haired cultivars with high PLH resistance provide alfalfa growers opportunities to reduce insecticide use within an integrated pest management strategy in regions where the PLH causes significant yield losses in susceptible cultivars.
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Claims 8
Claim · model-written summary
Cultivar and insecticide treatment interacted for cumulative alfalfa yield in two experiments.
- Taxon
- alfalfa
Medicago sativat0 - Treatment
- insecticide treatmente0
- Outcome
- cumulative yielde0
- Value
- P ≤ 0.01 and 0.14e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cultivar × insecticide treatment interactions ( P ≤ 0.01 and 0.14) were found for cumulative yield across years in two experiments.”
t0“Forage Yield and Nutritive Value Responses to Insecticide and Host Resistance in Alfalfa”
Claim · model-written summary
Early insecticide increased 54H91 forage yield by up to 6% compared with no insecticide.
- Taxon
- alfalfaMedicago sativat0
- Material
- 54H91e0
- Treatment
- early insecticide treatmente0
- Outcome
- forage yielde0
- Direction
- greatere0
- Value
- 6%e0
- Comparator
- without insecticidee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the early insecticide treatment on 54H91, forage yield was up to 6% greater ( P = 0.03) than without insecticide”
t0“Forage Yield and Nutritive Value Responses to Insecticide and Host Resistance in Alfalfa”
Claim · model-written summary
Early insecticide increased 54V54 yield by 17 to 37% compared with no insecticide.
- Taxon
- alfalfaMedicago sativat0
- Material
- 54V54e0
- Treatment
- early treatmente0
- Outcome
- yieldede0
- Direction
- moree0
- Value
- 17 to 37%e0
- Comparator
- without insecticidee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the susceptible 54V54 yielded 17 to 37% more ( P < 0.01) with the early treatment than without insecticide.”
t0“Forage Yield and Nutritive Value Responses to Insecticide and Host Resistance in Alfalfa”
Claim · model-written summary
Untreated 54V54 had 10 to 22 g kg−1 lower summer crude protein than early insecticide treated plants.
- Taxon
- alfalfaMedicago sativat0
- Material
- 54V54e0
- Treatment
- untreatede0
- Outcome
- Crude proteine0
- Direction
- lowere0
- Value
- 10 to 22 g kg −1e0
- Comparator
- early insecticide treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Crude protein (CP) of 54V54 in summer averaged 10 to 22 g kg −1 lower ( P < 0.05) for the untreated than with early insecticide treatment”
t0“Forage Yield and Nutritive Value Responses to Insecticide and Host Resistance in Alfalfa”
Claim · model-written summary
Fiber content and digestibility showed no consistent insecticide treatment differences.
- Taxon
- alfalfaMedicago sativat0
- Outcome
- forage fiber content or fiber digestibilitye0
- Direction
- not observede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“consistent differences in forage fiber content or fiber digestibility were not observed.”
t0“Forage Yield and Nutritive Value Responses to Insecticide and Host Resistance in Alfalfa”
Claim · model-written summary
Untreated 54H91 and late insecticide treated 54V54 had similar cumulative forage yields.
- Taxon
- alfalfaMedicago sativat0
- Material
- 54H91e0
- Treatment
- untreatede0
- Outcome
- Cumulative forage yielde0
- Direction
- similare0
- Comparator
- late insecticide‐treated susceptible 54V54e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cumulative forage yield across all harvests or across summer harvests in the untreated 54H91 were similar to yield of the late insecticide‐treated susceptible 54V54.”
t0“Forage Yield and Nutritive Value Responses to Insecticide and Host Resistance in Alfalfa”
Claim · model-written summary
Glandular-haired alfalfa suppressed potato leafhopper abundance without insecticide.
- Taxon
- alfalfaMedicago sativat0
- Material
- glandular‐haired alfalfa cultivare0
- Outcome
- PLH abundancee0
- Direction
- suppressede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The glandular‐haired alfalfa cultivar suppressed PLH abundance and reduced yield losses caused by this pest in the absence of insecticide applications.”
t0“Forage Yield and Nutritive Value Responses to Insecticide and Host Resistance in Alfalfa”
Claim · model-written summary
Glandular-haired alfalfa reduced potato leafhopper yield losses without insecticide.
- Taxon
- alfalfaMedicago sativat0
- Material
- glandular‐haired alfalfa cultivare0
- Outcome
- yield lossese0
- Direction
- reducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The glandular‐haired alfalfa cultivar suppressed PLH abundance and reduced yield losses caused by this pest in the absence of insecticide applications.”
t0“Forage Yield and Nutritive Value Responses to Insecticide and Host Resistance in Alfalfa”
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 →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.