Abstract
Onion thrips (Thrips tabaci Lindeman) is a major pest in organic onion production and effective integrated pest management strategies are lacking. Our objective was to evaluate combinations of semi-glossy (“Rossa di Milano” and B5336AxB5351C) and waxy (“Bradley”) onion cultivars with reflective mulch, with or without biopesticides (spinosad + neem oil tank mix), to manage T. tabaci in organic onion production. Thrips densities were assessed weekly and bulbs graded and weighed at harvest. Onions sprayed with spinosad + neem oil had fewer T. tabaci (adults: 74% (2019); larvae: 40% (2018), 84% (2019) and produced higher yields (13% (2018), 23% (2019)) than onions that were unsprayed, regardless of mulch type or onion cultivar. “Rossa di Milano” had relatively fewer adult and larval thrips populations compared with “Bradley” (21% (2018), 32% (2019)) and B5336AxB5351C. However, “Rossa di Milano” had the lowest marketable yield in both years. Reflective mulch reduced densities on certain dates in both years compared to white mulch, but the largest and most consistent reduction only occurred in 2019. Reflective mulch had no impact on bulb yield. While spinosad + neem oil reduced thrips numbers and increased yield alone, none of the treatment combinations were effective at suppressing populations of thrips. Future T. tabaci management in organic onions will require optimization of the available effective biopesticides.
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Claims 14
Claim · model-written summary
Sprayed onions had 74% fewer adult thrips in 2019 than unsprayed onions.
- Taxon
- Onions
Allium cepae0 - Treatment
- spinosad + neem oile0
- Interactor
- T. tabaci
Thrips tabacie0peste1 - Outcome
- T. tabacie0
- Direction
- fewere0
- Value
- 74%e0
- Comparator
- unsprayede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onions sprayed with spinosad + neem oil had fewer T. tabaci (adults: 74% (2019)”
e1“than onions that were unsprayed”
Claim · model-written summary
Sprayed onions had 40% fewer thrips larvae in 2018.
- Taxon
- OnionAllium cepat0
- Treatment
- spinosad + neem oile1
- Interactor
- T. tabaciThrips tabacie1pest
- Outcome
- larvaee0
- Direction
- fewere1
- Value
- 40%e0
- Comparator
- unsprayede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“larvae: 40% (2018), 84% (2019)”
e1“Onions sprayed with spinosad + neem oil had fewer T. tabaci (adults: 74% (2019); larvae: 40% (2018), 84% (2019) and produced higher yields (13% (2018), 23% (2019)) than onions that were unsprayed”
t0“Organic Onion Production”
t1“Organic Onion Production”
Claim · model-written summary
Sprayed onions had 84% fewer thrips larvae in 2019.
- Taxon
- OnionAllium cepat0
- Treatment
- spinosad + neem oile1
- Interactor
- T. tabaciThrips tabacie1pest
- Outcome
- larvaee0
- Direction
- fewere1
- Value
- 84%e0
- Comparator
- unsprayede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“larvae: 40% (2018), 84% (2019)”
e1“Onions sprayed with spinosad + neem oil had fewer T. tabaci (adults: 74% (2019); larvae: 40% (2018), 84% (2019) and produced higher yields (13% (2018), 23% (2019)) than onions that were unsprayed”
t0“Organic Onion Production”
t1“Organic Onion Production”
Claim · model-written summary
Sprayed onions yielded 13% more in 2018 than unsprayed onions.
- Taxon
- onionsAllium cepae0
- Treatment
- spinosad + neem oile1
- Outcome
- yieldse0
- Direction
- highere0
- Value
- 13%e0
- Comparator
- unsprayede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“produced higher yields (13% (2018), 23% (2019)) than onions that were unsprayed”
e1“Onions sprayed with spinosad + neem oil had fewer T. tabaci”
Claim · model-written summary
Sprayed onions yielded 23% more in 2019 than unsprayed onions.
- Taxon
- onionsAllium cepae0
- Treatment
- spinosad + neem oile1
- Outcome
- yieldse0
- Direction
- highere0
- Value
- 23%e0
- Comparator
- unsprayede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“produced higher yields (13% (2018), 23% (2019)) than onions that were unsprayed”
e1“Onions sprayed with spinosad + neem oil had fewer T. tabaci”
Claim · model-written summary
Rossa di Milano had 21% fewer thrips than Bradley in 2018.
- Taxon
- OnionAllium cepat0
- Material
- Rossa di Milanoe0
- Outcome
- adult and larval thrips populationse0
- Direction
- fewere0
- Value
- 21%e0
- Comparator
- Bradleye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0““Rossa di Milano” had relatively fewer adult and larval thrips populations compared with “Bradley” (21% (2018), 32% (2019))”
e1““Rossa di Milano” had relatively fewer adult and larval thrips populations compared with “Bradley” (21% (2018), 32% (2019))”
t0“Organic Onion Production”
t1“Organic Onion Production”
Claim · model-written summary
Rossa di Milano had 32% fewer thrips than Bradley in 2019.
- Taxon
- OnionAllium cepat0
- Material
- Rossa di Milanoe0
- Outcome
- adult and larval thrips populationse0
- Direction
- fewere0
- Value
- 32%e0
- Comparator
- Bradleye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0““Rossa di Milano” had relatively fewer adult and larval thrips populations compared with “Bradley” (21% (2018), 32% (2019))”
e1““Rossa di Milano” had relatively fewer adult and larval thrips populations compared with “Bradley” (21% (2018), 32% (2019))”
t0“Organic Onion Production”
t1“Organic Onion Production”
Claim · model-written summary
Rossa di Milano had fewer thrips than B5336AxB5351C.
- Taxon
- OnionAllium cepat0
- Material
- Rossa di Milanoe0
- Outcome
- adult and larval thrips populationse0
- Direction
- fewere0
- Comparator
- B5336AxB5351Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0““Rossa di Milano” had relatively fewer adult and larval thrips populations compared with “Bradley” (21% (2018), 32% (2019)) and B5336AxB5351C”
e1““Rossa di Milano” had relatively fewer adult and larval thrips populations compared with “Bradley” (21% (2018), 32% (2019)) and B5336AxB5351C”
t0“Organic Onion Production”
t1“Organic Onion Production”
Claim · model-written summary
Rossa di Milano had the lowest marketable yield in both years.
- Taxon
- OnionAllium cepat0
- Material
- Rossa di Milanoe0
- Outcome
- marketable yielde0
- Direction
- loweste0
- Qualifier
- both yearse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0““Rossa di Milano” had the lowest marketable yield in both years”
e1““Rossa di Milano” had the lowest marketable yield in both years”
t0“Organic Onion Production”
t1“Organic Onion Production”
Claim · model-written summary
Reflective mulch reduced thrips densities on certain dates versus white mulch.
- Taxon
- OnionAllium cepat0
- Treatment
- Reflective mulche0
- Interactor
- Thrips tabaciThrips tabacit1pest
- Outcome
- densitiese0
- Direction
- reducede0
- Qualifier
- certain dates in both yearse0
- Comparator
- white mulche0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reflective mulch reduced densities on certain dates in both years compared to white mulch”
e1“Reflective mulch reduced densities on certain dates in both years compared to white mulch”
t0“Management of Onion Thrips (Thrips tabaci) in Organic Onion Production Using Multiple IPM Tactics”
t1“Management of Onion Thrips (Thrips tabaci) in Organic Onion Production Using Multiple IPM Tactics”
Claim · model-written summary
Reflective mulch had its largest and most consistent thrips reduction in 2019.
- Taxon
- OnionAllium cepat0
- Treatment
- Reflective mulche1
- Outcome
- reductione0
- Direction
- largeste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the largest and most consistent reduction only occurred in 2019”
e1“Reflective mulch reduced densities on certain dates in both years compared to white mulch”
t0“Organic Onion Production”
t1“Organic Onion Production”
Claim · model-written summary
Reflective mulch had no impact on onion bulb yield.
- Taxon
- OnionAllium cepat0
- Treatment
- Reflective mulche0
- Outcome
- bulb yielde0
- Direction
- no impacte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reflective mulch had no impact on bulb yield”
e1“Reflective mulch had no impact on bulb yield”
t0“Organic Onion Production”
t1“Organic Onion Production”
Claim · model-written summary
None of the treatment combinations suppressed thrips populations effectively.
- Taxon
- OnionAllium cepat0
- Treatment
- treatment combinationse0
- Outcome
- populations of thripse0
- Direction
- nonee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“none of the treatment combinations were effective at suppressing populations of thrips”
e1“none of the treatment combinations were effective at suppressing populations of thrips”
t0“Organic Onion Production”
t1“Organic Onion Production”
Claim · model-written summary
Authors recommend optimizing effective biopesticides for future onion thrips management.
- Taxon
- onionsAllium cepae0
- Interactor
- T. tabaciThrips tabacie0peste1
- Outcome
- optimization of the available effective biopesticidese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Future T. tabaci management in organic onions will require optimization of the available effective biopesticides”
e1“Future T. tabaci management in organic onions will require optimization of the available effective biopesticides”
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See all 7 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.