Life history parameters of the biocontrol agent Gratiana spadicea (Chrysomelidae) reared on the natural host plant Solanum sisymbriifolium and the non-target crop Solarium melongena (Solanaceae)

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Gratiana spadicea (Klug), a leaf-feeding tortoise beetle native to South America, was released in South Africa for the biological control of Solanum sisymbriifolium Lamarck (wild tomato), despite its ability to develop on cultivated eggplant (Solanum melongena L.) during laboratory host-specificity...

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Autores principales:	Schachter-Broide, J., Gandolfo, D., Gürtler, R.E.
Formato:	JOUR
Materias:	Biological control Eggplant Gratiana spadicea Host specificity Oviposition preferences Wild tomato Chrysomelidae Coleoptera Lycopersicon esculentum Magnoliophyta Melongena Solanaceae Solanum Solanum melongena Solanum sisymbriifolium
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_10213589_v11_n1_p31_SchachterBroide
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_10213589_v11_n1_p31_SchachterBroide
record_format	dspace
spelling	todo:paper_10213589_v11_n1_p31_SchachterBroide2023-10-03T15:56:35Z Life history parameters of the biocontrol agent Gratiana spadicea (Chrysomelidae) reared on the natural host plant Solanum sisymbriifolium and the non-target crop Solarium melongena (Solanaceae) Schachter-Broide, J. Gandolfo, D. Gürtler, R.E. Biological control Eggplant Gratiana spadicea Host specificity Oviposition preferences Wild tomato Chrysomelidae Coleoptera Lycopersicon esculentum Magnoliophyta Melongena Solanaceae Solanum Solanum melongena Solanum sisymbriifolium Gratiana spadicea (Klug), a leaf-feeding tortoise beetle native to South America, was released in South Africa for the biological control of Solanum sisymbriifolium Lamarck (wild tomato), despite its ability to develop on cultivated eggplant (Solanum melongena L.) during laboratory host-specificity tests. Our studies in Argentina, during which beetle colonies were reared and sustained on both plant species, were aimed at determining whether a host range extension could be induced and thus whether eggplant crops may be under future threat in South Africa. During no-choice tests conducted under natural climatic conditions, larvae reared on potted eggplants suffered significantly higher mortality, longer developmental times and lower pupal masses than those reared on potted wild tomato. During choice tests under laboratory conditions, adult beetles fed significantly more on wild tomato than on eggplant, irrespective of whether the larvae were reared on eggplant or wild tomato, although the larger wild tomato-reared beetles consumed more than the smaller adults reared on eggplant. Under natural climatic conditions, females oviposited exclusively on wild tomato plants regardless of larval feeding history. During no-choice fecundity tests, females reared as larvae and adults on wild tomato had a significantly shorter preoviposition period and higher fecundity than females reared as larvae on wild tomato and as adults on eggplant, or as larvae and adults on eggplant. A significant percentage of females that spent part or all of their life cycle on eggplant laid only anomalous eggs (without a structure for leaf adhesion) or no eggs at all, whereas all females reared exclusively on wild tomato laid only normal eggs. The artificial rearing of G. spadicea on eggplant thus did not induce changes in adult feeding and oviposition preferences within the same generation, suggesting that eggplant is highly unlikely to serve as a viable alternative host for G. spadicea. Our study thus provides additional support for the decision taken to release G. spadicea in South Africa for the biological control of S. sisymbriifolium. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_10213589_v11_n1_p31_SchachterBroide
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Biological control Eggplant Gratiana spadicea Host specificity Oviposition preferences Wild tomato Chrysomelidae Coleoptera Lycopersicon esculentum Magnoliophyta Melongena Solanaceae Solanum Solanum melongena Solanum sisymbriifolium
spellingShingle	Biological control Eggplant Gratiana spadicea Host specificity Oviposition preferences Wild tomato Chrysomelidae Coleoptera Lycopersicon esculentum Magnoliophyta Melongena Solanaceae Solanum Solanum melongena Solanum sisymbriifolium Schachter-Broide, J. Gandolfo, D. Gürtler, R.E. Life history parameters of the biocontrol agent Gratiana spadicea (Chrysomelidae) reared on the natural host plant Solanum sisymbriifolium and the non-target crop Solarium melongena (Solanaceae)
topic_facet	Biological control Eggplant Gratiana spadicea Host specificity Oviposition preferences Wild tomato Chrysomelidae Coleoptera Lycopersicon esculentum Magnoliophyta Melongena Solanaceae Solanum Solanum melongena Solanum sisymbriifolium
description	Gratiana spadicea (Klug), a leaf-feeding tortoise beetle native to South America, was released in South Africa for the biological control of Solanum sisymbriifolium Lamarck (wild tomato), despite its ability to develop on cultivated eggplant (Solanum melongena L.) during laboratory host-specificity tests. Our studies in Argentina, during which beetle colonies were reared and sustained on both plant species, were aimed at determining whether a host range extension could be induced and thus whether eggplant crops may be under future threat in South Africa. During no-choice tests conducted under natural climatic conditions, larvae reared on potted eggplants suffered significantly higher mortality, longer developmental times and lower pupal masses than those reared on potted wild tomato. During choice tests under laboratory conditions, adult beetles fed significantly more on wild tomato than on eggplant, irrespective of whether the larvae were reared on eggplant or wild tomato, although the larger wild tomato-reared beetles consumed more than the smaller adults reared on eggplant. Under natural climatic conditions, females oviposited exclusively on wild tomato plants regardless of larval feeding history. During no-choice fecundity tests, females reared as larvae and adults on wild tomato had a significantly shorter preoviposition period and higher fecundity than females reared as larvae on wild tomato and as adults on eggplant, or as larvae and adults on eggplant. A significant percentage of females that spent part or all of their life cycle on eggplant laid only anomalous eggs (without a structure for leaf adhesion) or no eggs at all, whereas all females reared exclusively on wild tomato laid only normal eggs. The artificial rearing of G. spadicea on eggplant thus did not induce changes in adult feeding and oviposition preferences within the same generation, suggesting that eggplant is highly unlikely to serve as a viable alternative host for G. spadicea. Our study thus provides additional support for the decision taken to release G. spadicea in South Africa for the biological control of S. sisymbriifolium.
format	JOUR
author	Schachter-Broide, J. Gandolfo, D. Gürtler, R.E.
author_facet	Schachter-Broide, J. Gandolfo, D. Gürtler, R.E.
author_sort	Schachter-Broide, J.
title	Life history parameters of the biocontrol agent Gratiana spadicea (Chrysomelidae) reared on the natural host plant Solanum sisymbriifolium and the non-target crop Solarium melongena (Solanaceae)
title_short	Life history parameters of the biocontrol agent Gratiana spadicea (Chrysomelidae) reared on the natural host plant Solanum sisymbriifolium and the non-target crop Solarium melongena (Solanaceae)
title_full	Life history parameters of the biocontrol agent Gratiana spadicea (Chrysomelidae) reared on the natural host plant Solanum sisymbriifolium and the non-target crop Solarium melongena (Solanaceae)
title_fullStr	Life history parameters of the biocontrol agent Gratiana spadicea (Chrysomelidae) reared on the natural host plant Solanum sisymbriifolium and the non-target crop Solarium melongena (Solanaceae)
title_full_unstemmed	Life history parameters of the biocontrol agent Gratiana spadicea (Chrysomelidae) reared on the natural host plant Solanum sisymbriifolium and the non-target crop Solarium melongena (Solanaceae)
title_sort	life history parameters of the biocontrol agent gratiana spadicea (chrysomelidae) reared on the natural host plant solanum sisymbriifolium and the non-target crop solarium melongena (solanaceae)
url	http://hdl.handle.net/20.500.12110/paper_10213589_v11_n1_p31_SchachterBroide
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_version_	1807317713955061760

Life history parameters of the biocontrol agent Gratiana spadicea (Chrysomelidae) reared on the natural host plant Solanum sisymbriifolium and the non-target crop Solarium melongena (Solanaceae)

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