Timing of initiation of pharate adult development in Barbara colfaxiana (Kft.) (Lepidoptera: Olethreutidae)

1983 ◽  
Vol 61 (10) ◽  
pp. 2305-2306 ◽  
Author(s):  
T. S. Sahota ◽  
S. H. Farris ◽  
A. Ibaraki
Keyword(s):  
Adult Development ◽  
Adult Emergence ◽  
Histological Studies ◽  
Adult Diapause ◽  
Timing Of Initiation ◽  
Pharate Adult

Timing of initiation of pharate adult development in relation to 1- and 2-year pharate adult diapause of Barbara colfaxiana was investigated. Histological studies and adult emergence revealed that pharate adult development starts within 24 h after pupation both in 1- and 2-year diapause individuals.

scholarly journals Developmental regulation of ecdysone receptor (EcR) and EcR-controlled gene expression during pharate-adult development of honeybees (Apis mellifera)

2014 ◽  
Vol 5 ◽  
Author(s):  
Tathyana R. P. Mello ◽  
Aline C. Aleixo ◽  
Daniel G. Pinheiro ◽  
Francis M. F. Nunes ◽  
Márcia M. G. Bitondi ◽  
...  
Keyword(s):  
Gene Expression ◽  
Apis Mellifera ◽  
Adult Development ◽  
Developmental Regulation ◽  
Ecdysone Receptor ◽  
Pharate Adult

THE IMMATURE STAGES OF PTYCHOPTERA LENIS LENIS (DIPTERA: PTYCHOPTERIDAE) WITH NOTES ON THEIR BIOLOGY

1973 ◽  
Vol 105 (8) ◽  
pp. 1091-1099 ◽  
Author(s):  
I. D. Hodkinson
Keyword(s):  
Life Cycle ◽  
Water Depth ◽  
Adult Stage ◽  
Atmospheric Oxygen ◽  
Adult Emergence ◽  
Fourth Instar ◽  
Immature Stages ◽  
Experimental Conditions ◽  
Marginal Areas ◽  
Pharate Adult

AbstractThe four larval instars and the pupa of Ptychoptera lenis lenis Osten Sacken are described. Instars 2 to 4 are very similar morphologically but instar 1 is markedly different. Both a pharate pupal and a pharate adult stage were observed. Larvae are found in stagnant marginal areas of ponds where water depth does not exceed 4 cm and where benthic deposits of plant detritus exceed 8 cm. Fourth instar larvae, under experimental conditions, survived up to 45 days without contact with atmospheric oxygen but development was arrested. P. lenis has a 1 year life cycle with an extended adult emergence season from late May to the end of July.

Metamorphosis of the pretarsus in Frankliniella fusca (Hinds) (Thripidae) and Haplothrips verbasci (Osborn) (Phlaeothripidae) (Thysanoptera)

1973 ◽  
Vol 51 (12) ◽  
pp. 1211-1234 ◽  
Author(s):  
B. S. Heming
Keyword(s):  
Pupal Stage ◽  
Adult Emergence ◽  
Epidermal Cells ◽  
The Body ◽  
Larval Cuticle ◽  
Frankliniella Fusca ◽  
New Material ◽  
Depressor Muscle ◽  
Pharate Adult

During the propupal and pupal stages of Frankliniella fusca and Haplothrips verbasci, each leg consists of coxa, femur, and tibiotarsus.The adult pretarsus, tarsomeres, and tibial gland of F. fusca arise during the pupal stage through morphogenesis of the distal tibiotarsal epidermis. These structures become functional at the time of adult emergence on the completion of cuticle deposition. Most leg epidermal cells degenerate soon thereafter.The imaginal tarsal depressor muscle develops during the pupal and pharate adult stages through fusion and differentiation of myoblasts originating elsewhere in the body. Myofibrils of the larval pretarsal depressor muscle disappear during the propupal stage but reappear during the pupal and pharate adult stages with a different, adult configuration.At the larval–propupal apolysis, the larval restraining tendons detach at both ends from the larval cuticle, contract, and, throughout metamorphosis, nestle between the epidermis of unguitractor apodeme and tibiotarsus. During the pupal stage the tendons rotate transversely 90° and grow laterally through addition of new material to their sides.In H. verbasci, completion of these events requires an additional pupal stage.Leg metamorphosis in thrips is compared with that occurring in other insects and additional remarks are made on the origin of holometabolism in Thysanoptera.Chez la pronymphe et la nymphe de Frankliniella fusca et d'Haplothrips verbasci, chaque patte est constituée d'une coxa, d'un fémur et d'un tibio-tarse.

scholarly journals Limb regeneration modulates reproductive attributes in ladybirds: A case study in Propylea dissecta and Coccinella septempunctata

2020 ◽  
Author(s):  
Swati Saxena ◽  
Geetanjali Mishra ◽  
Omkar
Keyword(s):  
Adult Development ◽  
Limb Regeneration ◽  
Coccinella Septempunctata ◽  
Adult Emergence ◽  
Regeneration Ability ◽  
Body Parts ◽  
Egg Viability ◽  
Life Traits ◽  
Propylea Dissecta

ABSTRACTRegeneration is the capability to regrow or repair the lost or injured body parts. In holometabolous insects, the adult development undergoes through larval and pupal stages. Literature revealed that the limb regeneration has various impact on different life traits of organisms. In the present study, we investigated limb regeneration of two different sized ladybirds affect their life attributes. Fourth instar larvae of small ladybird Propylea dissecta and the large ladybird Coccinella septempunctata were taken from the laboratory stock and were given an ablation treatment, viz. forelegs of larvae were amputated at the base of the coxa. Amputated larvae were observed until the adult emergence. Emerged adults were grouped in different categories on the basis limb regeneration i.e. regenerated adults (incomplete regenerated in case of P. dissecta), unregenerated, and normal (control) adults. These adults were kept in different mating treatments. The unregenerated adults of both the ladybirds took more time to commence mating with shorter copulation duration and reduced fecundity and percent egg viability. Thus, it can be concluded that regeneration ability modulates the life attributes of the ladybirds irrespective of their body size.

Galleria mellonella (L.) Survivorship, Development and Protein Content in Response to Dietary Antibiotics

2008 ◽  
Vol 43 (1) ◽  
pp. 27-40 ◽  
Author(s):  
Ender Büyükgüzel ◽  
Yusuf Kalender
Keyword(s):  
Protein Content ◽  
Adult Development ◽  
Total Protein ◽  
Galleria Mellonella ◽  
Culture Media ◽  
Adult Emergence ◽  
Developmental Time ◽  
Total Protein Content ◽  
Wet Weight ◽  
High Concentrations

Antibiotics are routinely incorporated in insect culture media. Although culturing insects on diets containing antibiotics is a decades-old practice, the antibiotics can exert deleterious effects on the insects. Diets amended with penicillin, streptomycin, fluconazole or griseofulvin were evaluated as to their impact on survivorship, development, wet weight, and adult total protein content of Galleria mellonella (L.). Insects were reared from neonates to adults on artificial diets containing 0.001, 0.01, 0.1 or 1.0 g of the antibiotics (per 100 g diet). Dose- and stage-dependent variations in both biological and biochemical parameters occurred. Penicillin at high concentrations significantly increased the wet weight of the insect, whereas low dietary fluconazole, griseofulvin and streptomycin concentrations significantly increased wet weight and high concentrations decreased wet weight. Dietary antibiotic treatment resulted in significantly decreased survivorship and increased developmental time of larvae. The diet amended with 1.0 g of either penicillin or streptomycin decreased pupation and adult emergence by 50%. Larvae reared on the diets supplemented with the highest concentrations of fluconazole and griseofulvin produced as low as 20% of adults. The 0.1 g fluconazole treatment prolonged adult development by 8 d. High dietary griseofulvin concentrations markedly decreased total protein content of adults. Other antibiotics also resulted in decreased total protein content in adults depending on their types and concentrations. Slightly enhanced survivorship, shortened development and increased total protein content were observed with some sublethal doses of antibiotics. It appears that dietary antibiotic impact on insect biological parameters is exerted via their deteriorative effects on biochemical factors in relation to alterations in wet weight. Low concentrations of these antibiotics can be used in artificial rearing of G. mellonella .

PHARATE-ADULT DIAPAUSE OF BARBARA COLFAXIANA (KFT.): DIFFERENTIATION OF 1- AND 2-YEAR DORMANCY

1985 ◽  
Vol 117 (7) ◽  
pp. 873-876 ◽  
Author(s):  
T.S. Sahota ◽  
A. Ibaraki ◽  
S.H. Farris
Keyword(s):  
Adult Stage ◽  
Morphological Characteristics ◽  
Practical Significance ◽  
Potential Contribution ◽  
Adult Diapause ◽  
Stage Of Development ◽  
Histological Criteria ◽  
Pharate Adult

AbstractDiscovery of diapause in Barbara colfaxiana (Kft.) in the pharate-adult stage of development has allowed establishment of morphological characteristics to distinguish 1-year-diapause individuals from 2-year-diapause individuals at an earlier stage than previously possible. These morphological and some histological criteria are described. On the basis of morphological characteristics alone, 1- and 2-year-diapause individuals can be readily and reliably recognized by the unaided eye. The practical significance as well as the potential contribution of these findings to further research are pointed out.

Identification of the Bursicon-Containing Neurones in Abdominal Ganglia of the Tobacco Hornworm, Manduca Sexta

1982 ◽  
Vol 98 (1) ◽  
pp. 385-401 ◽  
Author(s):  
PAUL H. TAGHERT ◽  
JAMES W. TRUMAN
Keyword(s):  
Manduca Sexta ◽  
Adult Development ◽  
Adult Emergence ◽  
Peptide Hormone ◽  
Tobacco Hornworm ◽  
Abdominal Ganglion ◽  
Blue Cell ◽  
Efferent Pathways ◽  
Back Filling ◽  
Unique Individual

The abdominal ganglion neurones responsible for the secretion of the peptide hormone bursicon from the transverse nerves of the tobacco hornworm Manduca sexta have been localized. Each unfused abdominal ganglion produced bursicon during adult development. The hormone was then transported to the next posterior transverse nerve for subsequent release following adult emergence. Of the two efferent pathways that connect ganglia to posterior transverse nerves, only one had ultrastructural features consistent with a neurosecretory function. All axons in this pathway contained numerous, elementary, dense-cored granules with diameters ranging from 100 to 300 nm. In pharate adults, cobalt back-filling of this neurosecretory pathway revealed two groups of cell bodies in abdominal ganglia: three dorso-laterally and eight at the mid-line. Hormonal activity was present in lateral regions of the ganglion but not in mid-line regions. In the dorso-lateral region, four blueish cell bodies could be seen in the living tissue. The two combined clusters of four cells from both sides of the ganglion contained more than 60% of the bursicon activity present in the entire ganglion. More careful dissection of the cluster detected the presence of activity in cell pairs and individual members. Individual dye-fills of these blue cells demonstrated that three of these were the three lateral neurones that were back-filled from the transverse nerve. The fourth blue cell may be identical to a neurone whose axon travels in the descending, contralateral connective and exits the nervous system via the next posterior ganglion. On the basis of dendritic geometry, each of the neurones in the bursicon cell cluster could be identified as a unique, individual neurone.

Sign in / Sign up

Export Citation Format

Share Document