Nitrogen and water inputs to tomato plant do not trigger bottom-up effects on a leafminer parasitoid through host and non-host exposures
2018
Dong, Yong-Cheng | Han, Peng | Niu, Chang-Ying | Zappala, Lucia | Amiens-Desneux, Edwige | Bearez, Philippe | Lavoir, Anne-Violette | Biondi, Antonio | Desneux, Nicolas | Huazhong Agricultural University [Wuhan] (HZAU) | Institut Sophia Agrobiotech (ISA) ; Institut National de la Recherche Agronomique (INRA)-Université Nice Sophia Antipolis (1965 - 2019) (UNS)-Centre National de la Recherche Scientifique (CNRS) | Xinjiang Institute of Ecology and Geography [Urumqi] (XIEG) ; Chinese Academy of Sciences [Beijing] (CAS) | Università degli studi di Catania = University of Catania (Unict) | ItalianMIPAAF ; French ANR call ARIMnet2, project STomP [618127] ; Hubei Provincial Natural Science Foundation [2016CFB140] ; China Postdoctoral Science Foundation [2016 M592350] | Wiley | ANR-15-ARM2-0003,STomP,Sustainable Tomato Production: plant defense enhancement, development of new biopesticides and optimization of environmental, water and chemical inputs(2015) | European Project: 618127,FP7-ERANET-2013-RTD,FP7-ERANET-2013-RTD,ARIMNET2(2014)
International audience
Mostrar más [+] Menos [-]Inglés. 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 (<em>Solanum lycopersicum</em>) to test whether these manipulations could trigger bottom-up effects on the parasitoid <em>Necremnus tutae</em> via host (<em>Tuta absoluta</em>) and/or non-host (<em>Bemisia tabaci</em>) exposures, and compared the control efficacy of <em>N. tutae</em> on <em>T. absoluta</em> in the presence and absence of <em>B. tabaci</em>. RESULTS: The results showed no cascading effects of plant nitrogen and/or water inputs on <em>N. tutae</em> 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 <em>T. absoluta</em> from parasitoids was enhanced by an additionally provided non-host, which could produce alternative food sources extending <em>N. tutae</em> 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.
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Este registro bibliográfico ha sido proporcionado por Institut national de la recherche agronomique