Food utilization efficiency in fifth instar larvae of Antheraea mylitta (Lepidoptera: Saturniidae) infected with Nosema sp. and its effect on reproductive potential and silk production

Rath, Sudhansu S.; Prasad, B. C.; Sinha, B. R. R. P.

doi:10.1016/s0022-2011(03)00038-7

Cited by 35 publications

(24 citation statements)

References 25 publications

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“…Nosema sp. infecting Antheraea mylitta led to reduced growth and consumption but increased digestibility (Rath et al 2003). Similar reports exist from Choristoneura fumiferana infected by N. fumiferanae (Bauer and Nordin 1988); in this case also utilization eYciency for nitrogen was higher in infected hosts.…”

Section: Discussionsupporting

confidence: 80%

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Effect of midgut infection with the microsporidium Endoreticulatus schubergi on carbohydrate and lipid levels in Lymantria dispar larvae

2009

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Lymantria dispar (Lep., Lymantriidae), an important forest defoliator, is host for a variety of entomopathogenic microsporidia. These are obligate intracellular parasites that completely depend on resources provided by the hosts. The microsporidia infecting L. dispar diVer in the host tissues that become infected as well as in virulence, with presumably diVerent eVects on host physiology. Endoreticulatus schubergi infects the midgut tissue of the host; its virulence is low. We studied the eVects of infection with E. schubergi on carbohydrate and lipid levels in the L. dispar host larva. Trehalose titer in the hemolymph increased with larval age. There were no signiWcant diVerences between infected and uninfected hosts. Glycogen content of the host tissue also increased with age. Levels of this storage carbohydrate were signiWcantly lower in infected larvae at a late stage of infection when insects were either full grown larvae prior to pupation (57.4 § 5.7 and 36.4 § 5.2 g/mg in uninfected controls and infected hosts, respectively) or prepupae (53.2 § 3.4 vs. 34.7 § 4.7 g/mg). Lipid levels in host tissue likewise increased over time and were slightly but not signiWcantly lower in infected L. dispar at a late stage. The results suggest that L. dispar larvae are able to compensate for most of the loss of nurients to the developing microsporidia. DiVerences between these Wndings and the eVects of infection with the virulent microsporidium, Vairimorpha disparis, that infects the host's fat body and causes severe depletion of nutrients in L. dispar larvae are discussed.

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Section: Discussionsupporting

confidence: 80%

“…However, all these data stem from microsporidia that infect the fat body of the larvae. These pathogens also prolonged larval development signiWcantly Rath et al 2003). E. schubergi has no such eVect.…”

Section: Discussionmentioning

confidence: 96%

Effect of midgut infection with the microsporidium Endoreticulatus schubergi on carbohydrate and lipid levels in Lymantria dispar larvae

2009

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“…Larvae were then shifted into a rearing room at 28 ± 2°C, 75 ± 2% RH, photoperiod 11 h L:13 h D and fed on fresh and pre-weighed leaves of T. tomentosa (Rath et al, 2003a). Larvae were introduced into a cage on the third day of fifth instar with impregnated female uzi flies for host-parasitoid interactions.…”

Section: Insect Parasitization and Bioassaysmentioning

confidence: 99%

“…Host larvae were fed a sufficient quantity of T. tomentosa leaves twice a day. Larval populations were maintained by replacing them from buffer stocks to compensate for mortality and larvae used for dry weight determinations (Rath et al, 2003a). After completion of feeding, larvae were allowed to spin the cocoons outdoors, and thereafter respective cocoon shell weight was recorded.…”

Section: Insect Parasitization and Bioassaysmentioning

confidence: 99%