Abstract
We investigated the use of two insect cell lines to improve an artificial diet (DI) for the pupal ectoparasitoid Diapetimorpha introita. DI was supplemented with Grace's culture medium conditioned with IPL-LdFB, a cell line derived from fat body of the gypsy moth, Lymantria dispar (FBCell diet), and with Grace's medium conditioned with Sf9, a cell line derived from ovaries of the fall armyworm, Spodoptera frugiperda (Sf9Cell diet). The diets were also chemically analyzed for nutrients and any deficiencies were filled by the addition of nutrients. One-half ml aliquots of each diet were encapsulated in paraffin domes and newly hatched larvae of D. introita were placed on each diet (one larva/dome) and allowed to develop to the adult stage. Providing fresh diet on day four when the larvae were in the third instar did not improve parasitoid production. Compared with DI, only Sf9Cell had a positive effect on the parasitoid's growth, increasing the size of male parasitoids. The parasitoids, however, took longer to develop to the adult stage than those reared on the natural host. Neither cell line significantly enhanced the average weight of female parasitoids, shortened developmental time, nor increased % cocoons produced and % adult emergence. Providing additional nutrients (amino acids, vitamins, cations and anions, fatty acids and milk/egg protein) to both diets (based on chemical analyses of the cell line-supplemented diets) enhanced the average weight of the females on Sf9Cell and males and females on FBCell. The nutritional additions, however, did not improve the developmental time, pupation and adult emergence.
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Ferkovich, S., Morales-Ramos, J., Rojas, M. et al. Rearing of ectoparasitoid Diapetimorpha introita on an artificial diet: supplementation with insect cell line-derived factors. BioControl 44, 29–45 (1999). https://doi.org/10.1023/A:1009939028766
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DOI: https://doi.org/10.1023/A:1009939028766