« Previous AbstractPyrolytic product characteristics of biosludge from the wastewater treatment plant of a petrochemical industry    Next AbstractReducing indoor air pollution by air conditioning is associated with improvements in cardiovascular health among the general population »

J Chem Ecol

Title:		Responses of Helicoverpa armigera to tomato plants previously infected by ToMV or damaged by H. armigera
Author(s):		Lin L; Shen TC; Chen YH; Hwang SY;
Address:		"Department of Entomology, National Chung Hsing University, Taichung, Taiwan"
Journal Title:		J Chem Ecol
Year:		2008
Volume:		20080220
Issue:		3
Page Number:		353 - 361
DOI:		10.1007/s10886-008-9439-x
ISSN/ISBN:		0098-0331 (Print) 0098-0331 (Linking)
Abstract:		"We report the comparative inducing effects of a phytopathogen and a herbivorous arthropod on the performance of an herbivore. Tomato, Lycopersicon esculentum Mill., was used as the test plant, and tomato mosaic virus (ToMV) and corn earworm, Helicoverpa armigera Hubner, were used as the phytopathogen and herbivore, respectively. There were decreases in the efficiency of conversion of ingested food and efficiency of conversion of digested food when H. armigera was reared on tomato plants that had been previously inoculated with ToMV. However, virus inoculation did not affect feeding or oviposition preferences by H. armigera. In contrast, approximate digestibility, total consumption, relative growth rate, and relative consumption rate were lower for fourth-instar H. armigera that fed on plants previously damaged by the same herbivore. Feeding and oviposition were both deterred for H. armigera that fed on previously damaged plants. The duration of development of H. armigera was also prolonged under this treatment. Infection by ToMV and feeding damage by H. armigera increased the host plant's peroxidase and polyphenol oxidase activity, respectively, suggesting that the performance of H. armigera may be affected by the induced phytochemistry of the host plant. Overall, this study indicated that, in general, insect damage has a stronger effect than ToMV infection on plant chemistry and, subsequently, on the performance of H. armigera"
Keywords:		Animals Catechol Oxidase/metabolism Feeding Behavior Female Larva/physiology Solanum lycopersicum/chemistry/enzymology/*parasitology/*virology Male Mosaic Viruses/*physiology Moths/*physiology *Oviposition Peroxidase/metabolism;
Notes:		"MedlineLin, Li Shen, Tse-Chi Chen, Yi-Hua Hwang, Shaw-Yhi eng 2008/02/21 J Chem Ecol. 2008 Mar; 34(3):353-61. doi: 10.1007/s10886-008-9439-x. Epub 2008 Feb 20"