NDLI: Growth of a pupal ectoparasitoid, Diapetimorphaintroita, on an artificial diet: stimulation of growth rate by a lipid extract from host pupae

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BioControl : Volume 45, Issue 3, September 2000

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Growth of a pupal ectoparasitoid, Diapetimorphaintroita, on an artificial diet: stimulation of growth rate by a lipid extract from host pupae

Content Provider	Springer Nature Link
Author	Ferkovich, S.M. Shapiro, J. Carpenter, J.
Copyright Year	2000
Abstract	An artificial diet used to rear the ectoparasitoid,Diapetimorpha introita, was supplemented withlipids extracted from pupae of the host, Spodoptera frugiperda (J. E. Smith). The diet alsowas sequentially supplemented with four fatty acids(arachidonic, linoleic, γ-linolenic and oleic),flax oil and Lipid Concentrate® which is used in cellculture. Pupae were homogenized and extracted withchloroform:methanol (2:1 v/v) and after drying downthe chloroform and methanol phases separately, theresidues from each solvent phase were evaluated in theartificial diet. Growth-promoting activity wasobserved in the chloroform phase containing lipids. Diet supplemented with lipid stored at −80 °C, andinsects reared on diet with fresh 1× and 2× extractsdeveloped significantly faster than those reared onthe artificial diet but slower than those reared onhost pupae. The fresh 1× and the 2× extracts alsoenhanced the average weight of the males and females,respectively. Storing the lipids at −20 °C resultedin a loss of activity. A lipid extract from Galleria mellonella pupae increased the averageweight of male and females but did not increase theirdevelopmental rate. Adult emergence was not improvedby any of the dietary additives. None of thecommercial lipid treatments significantly reduceddevelopmental time; however, the γ-linolenicacid-supplemented diet significantly increased theaverage weight of females. TLC analyses of the lipidextract from S. frugiperda revealed lipidsrepresenting four classes of neutral lipids in theextract: triolein, cholesterol, diacylglycerol, andphospholipid. Data from this study indicate thatoptimization and successful utilization of anartificial diet to rear D. introita depends onidentification of host factors required by theparasitic for growth and development.
Starting Page	401
Ending Page	413
Page Count	13
File Format	PDF
ISSN	13866141
Journal	BioControl
Volume Number	45
Issue Number	4
e-ISSN	15738248
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2000-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Evolutionary Biology Plant Sciences Plant Pathology Animal Systematics/Taxonomy/Biogeography
Content Type	Text
Resource Type	Article
Subject	Insect Science Agronomy and Crop Science

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