Abstract
Citrus trees, Citrus sinensis (L.) Osbeck, grown in pots were fertilized weekly for 3 mo after grafting with 1, 1/10, 1/100, or 1/1,000× concentrations of a fertilizer solution. Eggs of the predaceous mite, Euseius tularensis (Congdon), were placed with ice plant, Malephora crocea (Jacquin) pollen on excised leaves, and no differences in survivorship or sex ratio were found during the 1st or 2nd generations of rearing. During the 2nd generation, however, egg production by E. tularensis reared on leaves from the 1× fertilized trees was higher both on the 1st d of oviposition and throughout most of the lifespan of the females compared with the other treatments. As fertilizer concentration decreased, fewer total eggs were deposited by E. tularensis females. Leaf analyses revealed significant, decreasing linear responses in concentrations of N, K, Mn, and Zn in the leaves as fertilizer concentration was decreased. Decreasing concentrations of N and Mn were significantly correlated with decreasing reproduction in the predaceous mite. These data suggest that E. tularensis feeds on leaf sap and its reproductive tential is influenced by the nutritional status of the citrus tree.
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Claims 6
Claim · model-written summary
Mite survivorship and sex ratio did not differ between fertilization treatments.
- Taxon
- Citrus sinensis
Citrus sinensise0 - Treatment
- fertilizer solutione0
- Interactor
- Euseius tularensisEuseius tularensise2other
- Outcome
- survivorship or sex ratioe1
- Direction
- no differencese1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Citrus trees, Citrus sinensis (L.) Osbeck, grown in pots were fertilized weekly for 3 mo after grafting with 1, 1/10, 1/100, or 1/1,000× concentrations of a fertilizer solution.”
e1“no differences in survivorship or sex ratio were found during the 1st or 2nd generations of rearing.”
e2“Euseius tularensis (Congdon)”
Claim · model-written summary
E. tularensis egg production on leaves from 1× fertilized citrus was higher than under other treatments.
- Taxon
- Citrus sinensisCitrus sinensise0
- Treatment
- 1× fertilizede1
- Interactor
- E. tularensisEuseius tularensise1other
- Outcome
- egg production by E. tularensise1
- Direction
- highere1
- Comparator
- other treatmentse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Citrus trees, Citrus sinensis (L.) Osbeck”
e1“egg production by E. tularensis reared on leaves from the 1× fertilized trees was higher both on the 1st d of oviposition and throughout most of the lifespan of the females compared with the other treatments.”
Claim · model-written summary
Lower fertilizer concentration produced fewer total E. tularensis eggs.
- Taxon
- Citrus sinensisCitrus sinensise0
- Treatment
- fertilizer concentratione1
- Interactor
- E. tularensisEuseius tularensise1other
- Outcome
- total eggs were deposited by E. tularensise1
- Direction
- fewere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Citrus trees, Citrus sinensis (L.) Osbeck”
e1“As fertilizer concentration decreased, fewer total eggs were deposited by E. tularensis females.”
Claim · model-written summary
Leaf N, K, Mn, and Zn concentrations declined with decreasing fertilizer.
- Taxon
- Citrus sinensisCitrus sinensise0
- Treatment
- fertilizer concentratione1
- Outcome
- concentrations of N, K, Mn, and Zn in the leavese1
- Direction
- decreasinge1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Citrus trees, Citrus sinensis (L.) Osbeck”
e1“Leaf analyses revealed significant, decreasing linear responses in concentrations of N, K, Mn, and Zn in the leaves as fertilizer concentration was decreased.”
Claim · model-written summary
Decreasing citrus leaf N and Mn correlated with decreasing mite reproduction.
- Taxon
- Citrus sinensisCitrus sinensise0
- Interactor
- Euseius tularensisEuseius tularensise2other
- Outcome
- reproduction in the predaceous mitee1
- Direction
- decreasinge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Citrus trees, Citrus sinensis (L.) Osbeck”
e1“Decreasing concentrations of N and Mn were significantly correlated with decreasing reproduction in the predaceous mite.”
e2“Euseius tularensis (Congdon)”
Claim · model-written summary
The authors infer that E. tularensis feeds on citrus leaf sap and its reproduction depends on citrus nutrition.
- Taxon
- Citrus sinensisCitrus sinensise0
- Interactor
- E. tularensisEuseius tularensise1other
- Outcome
- reproductive tentiale1
- Qualifier
- feeds on leaf sape1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Citrus trees, Citrus sinensis (L.) Osbeck”
e1“These data suggest that E. tularensis feeds on leaf sap and its reproductive tential is influenced by the nutritional status of the citrus tree.”
The same questions in other papers
fertilization · nutrient: content · Citrus sinensis (sweet orange)Positive and negative results
4 papers in the same direction as this paper · 26 in the opposite direction
- positive
- positive
- positive
27 papers more in this group
See all 31 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.