Nitrogen and water inputs to tomato plant do not trigger bottom-up effects on a leafminer parasitoid through host and non-host exposures.
Pest Manag Sci
; 74(3): 516-522, 2018 Mar.
Article
en En
| MEDLINE
| ID: mdl-28967203
ABSTRACT
BACKGROUND:
Bottom-up and top-down forces are major components of biological control against pests in an agro-ecosystem. Understanding the multi-trophic interactions between plants and secondary consumers would help optimize pest control strategies. We manipulated nitrogen and/or water inputs to tomato plants (Solanum lycopersicum) to test whether these manipulations could trigger bottom-up effects on the parasitoid Necremnus tutae via host (Tuta absoluta) and/or non-host (Bemisia tabaci) exposures, and compared the control efficacy of N. tutae on T. absoluta in the presence and absence of B. tabaci.RESULTS:
The results showed no cascading effects of plant nitrogen and/or water inputs on N. tutae via either host or non-host exposure. The bottom-up force was mitigated by chewing or sap-feeding insect consumers at the second energy level. By contrast, the top-down force on T. absoluta from parasitoids was enhanced by an additionally provided non-host, which could produce alternative food sources extending N. tutae longevity and enhancing the fitness of its offspring.CONCLUSION:
Our results provided evidence for the combination of bottom-up and top-down approaches in tomato integrated pest management programs. © 2017 Society of Chemical Industry.Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Agua
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Control Biológico de Vectores
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Solanum lycopersicum
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Interacciones Huésped-Parásitos
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Nitrógeno
Límite:
Animals
Idioma:
En
Año:
2018
Tipo del documento:
Article