(1) After treatment of larvae of instar 1 at preimago stages about 77% of the insects died.
(2) We detail the fatty acid compositions of last larval instars of two lepidopterans, Spodoptera frugiperda and Trichoplusia ni, two tissues from T. ni, a cell line derived from each species and the respective larval and cell culture media.
(3) Statistical analysis has shown the following: a) the growth inhibition, which is especially distinct in autumn-spring generation, takes place in the Ist instar larvae 1.76-2.20 mm long inhabiting the walls of the nasal cavity and concha (their average body length at hatching is 1.08 plus or minus 0.004 mm); the inhibition is associated with interpopulation relations and apparently does not depend on the date of its beginning and can last from 6 to 7 months; c) after the growth resumption the development continues uninterruptedly up to the moulting; the inhibition is also possible at the beginning of the 2nd instar and then the development proceeds without any intervals up to the complete maturation of larvae.
(4) A growth-blocking peptide (GBP) with repressive activity against juvenile hormone (JH) esterase has been isolated from the last (6th) instar larval plasma of the armyworm Pseudaletia separata (Lepidoptera: Noctuidae) parasitized by the parasitoid wasp Apanteles kariyai (Hymenoptera: Braconidae) (1,2).
(5) There are 4-5 replication rounds in the 1st instar, 2-3 rounds in the 2nd instar, the 3rd and the 4th instars have 1-2 rounds each.
(6) A preliminary behavioral assessment of late 3rd instar larvae exposed to 1.42 ppm suggests that these plant extracts produce 80% mortality after only 4-5 h of contact.
(7) Male genital imaginal discs from old (late-third-instar) larvae of Drosophila that had been X-irradiated with appropriate doses developed into severely damaged adult genitalia when implanted into old larvae, but they developed into completely normal adult genitalia when transplanted into 2-day-younger larvae.
(8) Thus it appears that a cerebral neuropeptide specifically inhibiting JH I synthesis by the CA is present in Manduca on day 4 of the last larval instar, a time when the hemolymph titer of JH must drop to ensure the occurrence of pupal commitment.
(9) A sharp rise in trehalose level of haemolymph is observed towards the end of 4th instar accompanied with sudden fall of the sugar in fat body during the same period, but after moulting blood trehalose abruptly decreases.
(10) CC-CA of the late VIth instar (VI3) larvae were used for assessment of ATTH.
(11) Two boys with ophthalmomyiasis caused by the first instar larva of the reindeer warble fly Hypoderma tarandi are reported.
(12) Genetic information on 25 enzyme polymorphisms in Drosophila subobscura, the location of corresponding genes, and cytological and genetic maps of the chromosomes are presented, as well as photographic maps of the salivary gland chromosomes in the third instar larva and white-case early pupal stages.
(13) The allatectomy in the 4th instar larvae of Rhodnius prolixus stops moulting in 93 per cent of the cases.
(14) Dormant neuroblasts are found adjacent to the neuropil in late embryos and early first instar larvae.
(15) Second instar larvae which survive the molt exhibit a marked reduction in growth and eventually die as small second instar larvae.
(16) Extremely high concentrations of Vg were observed in the hemolymph of female nymphs (fourth instar), particularly engorged nymphs, treated with CyM (10 micrograms).
(17) Studies on the endurance to starvation by the immatures of T. splendens showed that the III instar larvae survived longer than the I and II instar larvae.
(18) The larval brain and proventriculus in awdb3 homozygous third-instar larvae appear to be vacuolated due to the accumulation of lipid droplets.
(19) mortality was high), while the nymphal instars showed an adverse effect on ecdysis and adults which emerged from the treated last nymphal instar were characterized by high mortality, abnormal behaviour and reduced fecundity and viability.
(20) In third instar larvae, high levels of mRNA could be observed in brain, imaginal discs, and in salivary glands.
Nymph
Definition:
(n.) A goddess of the mountains, forests, meadows, or waters.
(n.) A lovely young girl; a maiden; a damsel.
(n.) The pupa of an insect; a chrysalis.
(n.) Any one of a subfamily (Najades) of butterflies including the purples, the fritillaries, the peacock butterfly, etc.; -- called also naiad.
Example Sentences:
(1) A relationship between the level of sterility induced by juvenoids and reductions in nymph-to-adult ratios permitted formulation of a biological action threshold for regulating treatment.
(2) After molting, resulting nymphs (n = 74) were fed on susceptible mice.
(3) sp., described from wild-caught and laboratory-reared females, males, nymphs, and larvae parasitizing the Humboldt Penguin, Spheniscus humboldti Meyen, is the fifth species of the Ornithodoros (Alectorobius) capensis group to be recognized in the Neotropical Region.
(4) It was found to remain intact until at least 11, 30 and 10 days after repletion in larvae, nymphs and females, respectively.
(5) The mayfly nymphs, Habrophlebia lauta Eaton and H. fusca (Curtis) were found to serve as experimental intermediate hosts.
(6) Extremely high concentrations of Vg were observed in the hemolymph of female nymphs (fourth instar), particularly engorged nymphs, treated with CyM (10 micrograms).
(7) Nymphs produced by the interrupted larval feeding method feed well on cattle, in regard to timing of detachment and weight, compared with nymphs produced by interrupted feeding on rabbits.
(8) The accumulating process and concentration ratios of ingested blood meals in the larvae and nymphs of Amblyomma testudinarium, Haemaphysalis campanulata, H. concinna, H. formosensis, H. hystricis, H. kitaokai, the bisexual and parthenogenetic strains of H. longicornis, H. megaspinosa, and Ixodes persulcatus on rabbits and Argas japonicus on chickens were comparatively investigated.
(9) Last week we hatched our 13,000th baby nymph – that’s the number that hatched since 2003, when we hatched our first ones.
(10) In addition, fenoxycarb caused mortality in 59% of the nymphs treated on day 6.
(11) The percentage of nymphs infected correlated with the viremic titer on the final day of engorgement (the time of maximum blood uptake).
(12) Rates of infection were 5.4% in adults (n = 467) and 3.4% in nymphs (n = 289); 15.6% of clusters of unengorged larvae harbored B. burgdorferi, suggesting transovarial passage of the spirochete.
(13) Inputs to the model were the temporal patterns of recruitment of nymphs into the active class, mortality and successful acquisition of hosts by the ticks.
(14) The fatty acid synthetase was active from Nymph L stage.
(15) Amblyomma cohaerens nymphs, which had been collected as engorged larvae from African buffalo (Syncerus caffer) in the Mara region of Kenya, transmitted a theilerial parasite to a steer.
(16) In order to study schizogony and merozoite formation, D. variabilis nymphs were allowed to feed on domestic cats experimentally infected with C. felis, after which the molted adult ticks were fed on susceptible cats.
(17) Development of the protozoan parasite Nuttallia danii was observed in salivary glands which were extirpated from Hyalomma anatolicum excavatum nymphs, fed as larvae on infected gerbils and held in organ culture.
(18) Variation in temperature (4-40 degrees C) had a significant effect on moulting rate of the ticks and transmission of theilerial parasites from nymphs to resultant adults.
(19) A total of 317 ticks (202 nymphs and 115 adults) from three different sites were examined for the spirochaete Borrelia burgdorferi Johnson et al.
(20) In the Eastern Cape Province of South Africa, larvae and nymphs of Ablyomma marmoreum Koch occur in habitats in which there is tree cover and herbaceous ground cover.