Total glycogen during development of Kerria lacca (Kerr.) (Homoptera: Coccoidea)

1975 ◽  
Vol 53 (3) ◽  
pp. 290-292
Author(s):  
M. S. Haque
Keyword(s):  
Glycogen Content ◽  
Adult Stage ◽  
Pupal Stage ◽  
Kerria Lacca ◽  
Low Level ◽  
Lac Insect

Glycogen is present in the newly emerged larva of Kerria lacca (Kerr.). In the male lac insect the quantity of glycogen reaches a maximum in the early pupal stage and then declines sharply to a low level in the adult. In the female lac insect the total glycogen content increases regularly up to the adult stage.

Frequency of honeydew excretion in the lac insect, Kerria lacca (Kerr) (Homoptera: Tachardiidae)

1968 ◽  
Vol 46 (3) ◽  
pp. 600-601 ◽  
Author(s):  
P. N. Srivastava ◽  
R. K. Varshney
Keyword(s):  
Adult Female ◽  
Adult Stage ◽  
Physiological Activity ◽  
Adult Life ◽  
Fold Increase ◽  
Kerria Lacca ◽  
Honeydew Excretion ◽  
Lac Insect

The frequency of honeydew excretion in the larva of the lac insect, Kerria lacca (Kerr), varies from 2.08 to 3.30 droplets, and that in the fertilized adult female from 8.04 to 10.10 droplets per insect per hour. Approximately three- to- five-fold increase in the frequency of excretion from the larval to the adult stage is an indication of the vigorous physiological activity during the adult life of the insect.

The Post-embryonic Development of the Tracheal System in Drosophila melanogaster

1957 ◽  
Vol s3-98 (41) ◽  
pp. 123-150
Author(s):  
JOAN M. WHITTEN
Keyword(s):  
Drosophila Melanogaster ◽  
Adult Stage ◽  
Larval Instar ◽  
Pupal Stage ◽  
Tracheal System ◽  
True Nature ◽  
The Third ◽  
Air Sacs ◽  
Abdominal Region ◽  
Pupal Cuticle

The fate of the tracheal system is traced from the first larval instar to the adult stage. The basic larval pattern conforms to that shown for other Diptera Cyclorrhapha (Whitten, 1955), and is identical in all three instars. According to previous accounts the adult system directly replaces the larval: the larval system is partly shed, partly histolysed, and the adult system arises from imaginal cell clusters independently of the preceding larval system. In contrast, it is shown here that in the cephalic, thoracic, and anterior abdominal region there is a definite continuity in the tracheal system, from larval, through pupal to the adult stage, whereas in the posterior abdominal region the larval system is histolysed, and the adult system is independent of it in origin. Moreover, in the pupal stage this region is tracheated by tracheae arising from the anterior abdominal region and belonging to a distinct pupal system. Moulting of the tracheal linings is complete at the first and second larval ecdyses, but incomplete at the third larval-pupal and pupal-adult ecdyses. In consequence, in both pupal and adult systems there are tracheae which are secreted around preexisting tracheae, others formed as new ‘branch’ tracheae, and those which have been carried over from the previous instar. In the adult the newly formed tracheae of the posterior abdominal region fall into a fourth category. Most of the adult thoracic air sacs correspond to new ‘branch’ tracheae of other instars. The pre-pupal moult and instar are discussed with reference to the tracheal system and tentative suggestions are made concerning the true nature of the pre-pupal cuticle. There is no pre-pupal tracheal system. Events traced for Drosophila would seem to be general for Cyclorrhapha, both Acalypterae and Calypterae. The separate fates of the anterior and posterior abdom inal systems, in contrast with the straightforward development in Dipterc Nematocera, would appear to mark a distinct step in the evolution of the system in Diptera.

Variations in the fecundity of strongylid worms of the horse

Parasitology ◽  
1971 ◽  
Vol 63 (2) ◽  
pp. 289-298 ◽  
Author(s):  
C. P. Ogbourne
Keyword(s):  
Seasonal Variations ◽  
Adult Stage ◽  
Age Distribution ◽  
Horse Race ◽  
Seasonal Differences ◽  
Low Level ◽  
Infective Larvae ◽  
Laboratory Facilities ◽  
Strongylus Vulgaris ◽  
Faecal Egg Counts

SUMMARYA large proportion of Strongylus vulgaris, S. edentatus and Trichonema nassatum collected from the gut lumen of slaughtered horses during the winter did not contain eggs. The proportion of Trichonema catinatum without eggs declined to a low level during the winter and rose to relatively high levels during the summer, It has been concluded that worms without eggs are newly matured individuals and that seasonal variations in fecundity reflect similar fluctuations in the age distribution of the adult populations. These fluctuations are related to seasonal differences in the numbers of infective larvae ingested and to the length of parasitic development.Most Strongylus vulgaris, S. edentatus and Trichonema nassatum reach the adult stage during the winter and it has been suggested that an increase in worm numbers during this period is responsible for a rise in the faecal egg counts of horses in the spring. The observations on T. catinatum indicate that the level is maintained by the arrival of new individuals during the summer.I wish to thank Dr H. D. Crofton for his constant advice and encouragement during this work and Professor H. E. Hinton, F.R.S., for the provision of laboratory facilities. I am indebted to Mr L. J. Potter for allowing me to collect the parasites from his slaughterhouse at Bishop Sutton, near Bristol. This work was carried out during a research studentship funded by the Horse Race Betting Levy Board.

scholarly journals Erratum to: Effect of Broodlac Treatment with Insecticides on Population Reduction of Predators and Parasitoids of Lac Insect, Kerria lacca (Kerr)

2013 ◽  
Vol 36 (5) ◽  
pp. 569-569
Author(s):  
Jai Prakash Singh ◽  
Anil Kumar Jaiswal ◽  
Mohammad Monobrullah ◽  
P. Patamajhi
Keyword(s):  
Kerria Lacca ◽  
Population Reduction ◽  
Lac Insect

GROWTH AND DEVELOPMENT OF LARVAE OF THE GRANARY WEEVIL, SITOPHILUS GRANARIUS (COLEOPTERA: CURCULIONIDAE), ON NATURAL AND MERIDIC DIETS

1973 ◽  
Vol 105 (2) ◽  
pp. 249-256 ◽  
Author(s):  
J. E. Baker ◽  
J. M. Mabie
Keyword(s):  
Wheat Flour ◽  
Growth Rates ◽  
Adult Stage ◽  
Larval Growth ◽  
Pupal Stage ◽  
Sitophilus Granarius ◽  
Granary Weevil ◽  
Whole Wheat Flour ◽  
Whole Wheat ◽  
Meridic Diet

AbstractA procedure is described for obtaining free eggs and first-stage larvae of Sitophilus granarius (L.) and rearing the larvae to the adult stage on whole wheat, corn, and rice flours and on diet 2, a casein–starch-based meridic diet.Larval growth rates of males and females reared at 29 °C and 65% R.H. on whole wheat flour were comparable although males attained a higher maximum mean weight. Days to 50% adult emergence (eclosion) were 25.5 and 26.5 for females and males, respectively.Larval growth rates on whole wheat flour were comparable with those on whole corn flour but were better than the rates obtained on whole rice flour; however, growth on diet 2 was improved compared with that on whole wheat flour. The mean weights of 14-day-old larvae were 2.51 ±.40 mg and 1.25 ±.16 mg for those reared on diet 2 and wheat flour, respectively. Similarly, survival to the adult stage was slightly greater (79%) on diet 2 than on wheat (70%). On diet 1, a casein–glucose-based meridic diet, no larvae developed to the pupal stage.

Indian lac insect,Kerria lacca, as an important source of honeydew

Bee World ◽  
1999 ◽  
Vol 80 (3) ◽  
pp. 115-118 ◽  
Author(s):  
K Krishan Sharma ◽  
A Bhattacharya ◽  
S N Sushil
Keyword(s):  
Kerria Lacca ◽  
Lac Insect

SEASONAL DEVELOPMENT AND HABITS OF PSEUDOPITYOPHTHORUS SPP. (COLEOPTERA: SCOLYTIDAE) IN SOUTHERN OHIO

1969 ◽  
Vol 101 (3) ◽  
pp. 306-313 ◽  
Author(s):  
Charles O. Rexrode
Keyword(s):  
Larval Stage ◽  
Bark Beetles ◽  
Adult Stage ◽  
Average Length ◽  
Pupal Stage ◽  
Seasonal Development ◽  
Two Generations ◽  
Spring Emergence ◽  
Seasonal History ◽  
Initial Entry

AbstractDuring 1965–67, the seasonal history and habits of two oak bark beetles, Pseudopityophthorus minutissimus (Zimm.) and P. pruinosus (Eichhoff), were studied in 47 oaks, Quercus spp., in southern Ohio.All study trees were attacked and the male beetles made initial entry into the trees. The attack period per tree was usually 1–3 days, and the density of attack varied from 5 to 120 galleries 1 ft2 of surface area. Oviposition began as soon as egg gallery construction began, and the incubation period was about 5 days in the summer. The rate of egg gallery construction was about 0.2 in./day in mid-summer. The average length of the egg galleries was 1.9 cm and the average number of eggs per gallery was 41.5. Over 50% of the parent adults of both species re-emerged after egg gallery construction and oviposition. The re-emerging parent adults can attack, lay eggs, and re-emerge three times. The larval stage can last 25–247 days, the pupal stage 15–139 days, and the adult stage 7–198 days. The beetles can overwinter in every stage but the pupal stage. Spring emergence occurred 29 April in 1966 and 14 April in 1967, and in southern Ohio, two generations and a partial one occur each year.Trap trees were attacked 7–205 days and brood emergence lasted 58–329 days. The beetles can attack one tree three times.

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