Abstract
Abstract Fertilization reduction could be a useful pest management tactic for floriculture crops if it reduced pest populations with minimal impact on crop yield and quality. We evaluated the response of the western flower thrips, Frankliniella occidentalis Pergande (Thysanoptera: Thripidae), to different fertilization levels for cut roses, Rosa hybrida L. cv. ‘Tropicana’, and quantified fertilization effects on (i) abundance of F. occidentalis on cut roses, (ii) biological control of F. occidentalis on cut roses and (iii) nutritional quality of the cut flower crop. We tested a commercially available fertilizer (Peters Excel 15‐5‐15 Cal‐Mag; The Scotts Company, Marysville, OH) at 100% and 33% of the recommended nitrogen level (150 ppm N) for rose production using liquid‐feeding and two control measures: no thrips control measure; release of a predatory mite, Amblyseius swirskii (Athias‐Henriot). To maintain equivalent ratios of macro‐ and micronutrients for all our fertilizer treatments, we varied only the concentration of the fertilizer to the levels specified in our experiments. Lowering fertilization rate from 100% to 33% of the recommended level reduced mean F. occidentalis abundance on cut roses by 30%. Combinations of both bottom‐up (fertilization) and top‐down (biological control) tactics provided better F. occidentalis control than either tactic alone. Flower production was not compromised on plants fertilized with 33% of the recommended level. Nitrogen, phosphorous and potassium content of the leaf tissue decreased at 33% of the recommended fertilization level, but all values were within optimal ranges for cut roses. We propose that fertility management may be an effective means of reducing thrips numbers on cut roses.
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Claims 6
Claim · model-written summary
Lowering fertilization from 100% to 33% of the recommended level reduced mean F. occidentalis abundance on cut roses by 30%.
- Taxon
- cut rosese1
- Treatment
- Lowering fertilization rate from 100% to 33% of the recommended levele1
- Interactor
- F. occidentalis
Frankliniella occidentalise1pest - Outcome
- mean F. occidentalis abundancee1
- Direction
- reducede1
- Value
- 30%e1
- Comparator
- 100%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Lowering fertilization rate from 100% to 33% of the recommended level reduced mean F. occidentalis abundance on cut roses by 30%”
Claim · model-written summary
Combining fertilization reduction with biological control gave better F. occidentalis control on roses than either tactic alone.
- Taxon
- cut rosese2
- Treatment
- biological controle2
- Interactor
- F. occidentalisFrankliniella occidentalise1pest
- Second interactor
- Amblyseius swirskii
Amblyseius swirskiie3biocontrol_agent - Outcome
- F. occidentalis controle1
- Direction
- bettere1
- Comparator
- either tactic alonee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“provided better F. occidentalis control than either tactic alone”
e2“biological control of F. occidentalis on cut roses”
e3“release of a predatory mite, Amblyseius swirskii”
Claim · model-written summary
Flower production was not compromised on plants fertilized with 33% of the recommended level.
- Taxon
- cut rosese2
- Treatment
- fertilized with 33% of the recommended levele4
- Outcome
- Flower productione4
- Direction
- not compromisede4
Not reportedComparator
Verbatim
e2“biological control of F. occidentalis on cut roses”
e4“Flower production was not compromised on plants fertilized with 33% of the recommended level”
Claim · model-written summary
Nitrogen, phosphorous and potassium content of leaf tissue decreased at 33% of the recommended fertilization level.
- Taxon
- cut rosese2
- Organ / stage
- leaf tissuee5
- Treatment
- 33% of the recommended fertilization levele5
- Outcome
- Nitrogen, phosphorous and potassium contente5
- Direction
- decreasede5
Not reportedComparator
Verbatim
e2“biological control of F. occidentalis on cut roses”
e5“Nitrogen, phosphorous and potassium content of the leaf tissue decreased at 33% of the recommended fertilization level”
Claim · model-written summary
Leaf nitrogen, phosphorous and potassium values on cut roses stayed within optimal ranges despite the decrease.
- Taxon
- cut rosese6
- Organ / stage
- leaf tissuee5
- Outcome
- Nitrogen, phosphorous and potassium contente5
- Qualifier
- within optimal rangese6
Not reportedDirection
Verbatim
e5“Nitrogen, phosphorous and potassium content of the leaf tissue decreased at 33% of the recommended fertilization level”
e6“all values were within optimal ranges for cut roses”
Claim · model-written summary
The authors propose that fertility management may be an effective means of reducing thrips numbers on cut roses.
Verbatim
e7“We propose that fertility management may be an effective means of reducing thrips numbers on cut roses”
The same questions in other papers
fertilization · yield · RosaPositive and negative results
7 papers in the same direction as this paper · 20 in the opposite direction
- positive
- positive
- positive
24 papers more in this group
See all 28 papers →biocontrol · Frankliniella occidentalis · RosaResults 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.