Bionomics of Agrilus acutus (Thnb.) (Col., Buprestidae) on mesta (Hibiscus cannabinus) in India

1969 ◽  
Vol 58 (3) ◽  
pp. 421-430 ◽  
Author(s):  
Dilip Kumar Dutt
Keyword(s):  
Life History ◽  
Relative Humidity ◽  
Larval Stage ◽  
Lower Surface ◽  
Hibiscus Cannabinus ◽  
Prepupal Stage ◽  
Active Feeding ◽  
Cent Relative Humidity ◽  
History Of ◽  
Pupal Chamber

An account is given of the life-history of Agrilus acutus (Thnb.) (Buprestidae), a pest of ‘mesta’ (Hibiscus cannabinus) in india. The eggs are ovate and scale like, and are laid singly on the stem, usually near a leaf scar, and when kept at 31°C. and 73 per cent. relative humidity hatched on average in 12.4 days. The larva bores through the lower surface of the egg directly into the stem and feeds under the bark forming a sprial tunnel. A raised weal develops on the surface of the stem overlying the tunnel. Before each moult, the larva bores into the wood and makes a vertical chamber in which moulting occurs. There are normally three moults in the active feeding stages, but exceptionally four, and a prepupal moult. The rate of tunnelling is at first about 56 mm. per day and later eaches about 107 mm. The larval stage lests 26 days. The fully grown larva is 21 mm. long and bores into the wood to pupate, making a pupal chamber 11 mm. long into which it fits itself by adopting an asymmetrical U-shaped posture. After a prepupal stage of 2.5 days it pupates. The pupal period occupies about 11.7 days and a further seven days are spent by the adult in the pupal chamber. The adult female mates within a day of emergence from the stem. but does not oviposit until at least seven days have elapsed.

LIFE HISTORY STUDIES OF THE TOBACCO FLEA BEETLE, EPITRIX HIRTIPENNIS (MELSHEIMER) (COLEOPTERA: CHRYSOMELIDAE)

1987 ◽  
Vol 22 (3) ◽  
pp. 237-244 ◽  
Author(s):  
W. Davis Martin ◽  
G. A. Herzog
Keyword(s):  
Life History ◽  
Larval Stage ◽  
Flea Beetle ◽  
Pupal Stage ◽  
Adult Emergence ◽  
Adult Longevity ◽  
Male And Female ◽  
Controlled Conditions ◽  
History Of ◽  
The Mean

The life history of the tobacco flea beetle, Epitrix hirtipennis (Melsheimer) (= Epitrix parvula Fab.) was studied under the controlled conditions of 27 ± 2.8°C, 80 ± 6% and a 14L:10D photophase. Eggs matured in ca. 4 days, the larval stage, including 3 instars, developed in 13 days, prepupal development took 3 days and the pupal stage lasted approximately 5 days. There was a 24 day interval between oviposition and adult emergence. Females laid 3.1 eggs/day with a 13 day period between adult emergence and first oviposition. The mean number of total eggs/female was 138.6 ± 14.7. Female oviposition continued until a few days before death and adult longevity was approximately 70 days. A visual means of distinguishing between male and female beetles was also developed.

NOTES ON THE LIFE HISTORY OF ECPANTHERIA SCRIBONIA, STOLL

1891 ◽  
Vol 23 (5) ◽  
pp. 106-108
Author(s):  
Harrison. G. Dyar
Keyword(s):  
Life History ◽  
Larval Stage ◽  
History Of ◽  
Southern Florida

The preparatory stages of this species do not seem to have been described. Mr. Hy. Edwards in his catalogue gives eleven references, but in none is the egg mentioned, or any but a single larval stage, and in only one the pupa. It will, therefore, not be amiss to briefly describe the several stages here. I would like first to call attention to the remarkable fertility of the insect in question, at least in Southern Florida where I met with it.

THE LIFE HISTORY OF THE CARROT WEEVIL, LISTRONOTUS OREGONENSIS (COLEOPTERA: CURCULIONIDAE) UNDER CONTROLLED CONDITIONS

1976 ◽  
Vol 108 (9) ◽  
pp. 931-934 ◽  
Author(s):  
P. Martel ◽  
H. J. Svec ◽  
C. R. Harris
Keyword(s):  
Life History ◽  
Life Cycle ◽  
Larval Stage ◽  
Egg Production ◽  
Laboratory Studies ◽  
Preoviposition Period ◽  
Complete Life Cycle ◽  
History Of ◽  
Listronotus Oregonensis ◽  
Carrot Weevil

AbstractLaboratory studies on the biology of the carrot weevil, Listronotus oregonensis (LeConte), were performed at 21° and 27 °C. At 21 °C females laid eggs for 88 days on carrot slices and 94 days on foliage. Egg production per female averaged 156 and 175 on slices and leaves respectively. Eggs hatched after 8.3 days incubation and the larval stage comprising four instars was completed in 19.1 days. The prepupal and pupal stages lasted 3.7 and 9.4 days respectively. The complete life cycle including an average preoviposition period of 17 days was 57.6 days. Development was more rapid at 27 °C, with the complete life cycle taking only 37 days.

The life-history of Hyalomma anatolicum anatolicum Koch, 1844 (Ixodoidea, Ixodidae) under laboratory conditions

Parasitology ◽  
1969 ◽  
Vol 59 (1) ◽  
pp. 105-122 ◽  
Author(s):  
K. R. Snow
Keyword(s):  
Life History ◽  
Relative Humidity ◽  
Research Council ◽  
Science Research ◽  
Ixodid Tick ◽  
Hyalomma Anatolicum ◽  
Hyalomma Anatolicum Anatolicum ◽  
Egg Incubation ◽  
History Of ◽  
Research Grant

The durations of the various phases of the life-history of the ixodid tick H. anatolicum anatolicum are described with particular reference to the modifying influence of temperature and relative humidity. An increase in the ambient temperature was found to decrease the length of the feeding, preoviposition, oviposition, larval and nymphal moulting periods and the egg-incubation period. The effect of change in relative humidity was less marked, the only significant effect being on the oviposition period which was protracted when the relative humidity was increased.Daily percentage water loss and longevity were found to be more or less inversely proportional. Thus at high temperatures and low relative humidities a large percentage of water was lost daily with consequent reduced life span.I wish to thank Dr R. P. Chaudhuri for providing me with the specimens of H. anatolicum anatolicum from which the culture was started, and Professor D. R. Arthur for his advice and assistance. I am also grateful to the Science Research Council for the provision of a research grant.

STUDIES IN THE LIFE HISTORY OF TRACHYKELE BLONDELI MARSEUL

1932 ◽  
Vol 64 (8) ◽  
pp. 189-191
Author(s):  
Geo. R. Hopping
Keyword(s):  
British Columbia ◽  
Life History ◽  
Larval Stage ◽  
Red Cedar ◽  
History Of ◽  
Cheese Cloth

In connection with studies on the biology of T. blondeli, condnctec in the years 1926 to 1930 inclusive, at Pender Harbour, British Columbia, red cedar trees were inclosed in cheese-cloth cages with a view to determining the duration of the larval stage. The cages were constructed prior to April 30, 1926, and the emergence of bettles from the trees was recorded.

LIFE HISTORY OF THE FUNGUS GNAT MACROCERA NOBILIS IN AMERICAN CAVES (DIPTERA: MYCETOPHILIDAE)

1976 ◽  
Vol 108 (11) ◽  
pp. 1235-1241 ◽  
Author(s):  
Stewart B. Peck ◽  
Donald R. Russell
Keyword(s):  
Life History ◽  
Life Cycle ◽  
Larval Development ◽  
New Hampshire ◽  
Larval Stage ◽  
Pupal Stage ◽  
Insect Prey ◽  
History Of ◽  
Fungus Gnat ◽  
Life Cycle Development

AbstractThe mycetophilid Macrocera nobilis Johnson, previously known only from forests in New Hampshire and Massachusetts, is here reported from caves in Oklahoma, Missouri, Kentucky, Tennessee, and West Virginia. A study of populations in Oklahoma shows that the short-lived adults mate in cave entrances, but that oviposition, larval development, and pupation occur only in the dark zone of caves. The larvae build extensive webs upon which they travel and which they use to capture insect prey (mostly other Diptera). Reproduction and life cycle development is not seasonal. The larval stage lasts 9 or 10 months, and the pupal stage about 2 weeks.

Life history of Amblyseius fustis (Pritchard and Baker), an indigenous predator of the cassava red mite, Oligonychus gossypii (zacher) in south western Nigeria

1985 ◽  
Vol 6 (2) ◽  
pp. 193-197 ◽  
Author(s):  
T. O. Ezulike ◽  
J. A. Odebiyi
Keyword(s):  
Life History ◽  
Life Cycle ◽  
Relative Humidity ◽  
Developmental Stages ◽  
Developmental Period ◽  
Life Stages ◽  
Male And Female ◽  
Significant Difference ◽  
History Of ◽  
Male To Female

AbstractThe life history of Amblyseius fustis (Pritchard and Baker) was studied in the laboratory at a fluctuating temperature and relative humidity ranging from 24.4 to 28.0°C and 55.5 to 75.6%, respectively. The developmental stages consist of egg, larva, protonymph, deutonymph and adult. The life cycle, from egg to adult of both male and female was about 8 days, while longevity was about 19.2 days. Mated female laid an average of 18.8 eggs. There was no significant difference in the longevity and fecundity of predators fed on different life stages of the host. The proportion of male to female in the progeny of mated females was 1:4.A. fustis has a shorter developmental period and lives longer than its prey, but the latter is more fecund (26.9 eggs/♀) and has a higher proportion of females in its progeny (1:4.8). The shorter developmental period and the longer life span of the predator are likely to offset the higher fecundity of the prey.

The prepupal Stage in Ichneumonidae, illustrated by the life-history of Exenterus abruptorius, Thb.

1937 ◽  
Vol 28 (4) ◽  
pp. 525-534 ◽  
Author(s):  
K. R. S. Morris
Keyword(s):  
Life History ◽  
Stage Larva ◽  
Full Description ◽  
Prepupal Stage ◽  
Pine Sawfly ◽  
Parasite Larva ◽  
History Of ◽  
Last Stage ◽  
Important Parasite

A full description is given of the life-history of Exenterus abruptorius, Thb., an important parasite of the pine sawfly, Diprion sertifer, Geoff.The insect is univoltine, like the host. It oviposits on the last stage larva or prepupa and only hatches after the host has spun its cocoon. Only one-quarter of the primary larvae develop immediately, the remainder resting up to two and a-half months during the summer before proceeding with their development. On the completion of feeding the parasite larva spins its cocoon within the host cocoon and enters the prepupal stage, which can be divided into two distinct phases, eonymphal and pronymphal. Hibernation is always in the eonymphal stage. In Sweden 37 per cent. of this species remained in hibernation for two winters, but in Hungary all emerged in the spring following the year of development. Further than this, in Sweden the sexes were in approximately equal proportions; in Hungary females exceeded males by four to one. This may indicate the existence of biological races.Other Ichneumonidae exhibit the prepupal stage, with eonymphal and pronymphal phases, in their development. The typical facies of this is analogous to that in the prepupal stage in Tenthredinidae, in which, however, ecdysis precedes this stage, which is then a distinct instar. It is suggested that an instar is lost in the development of the Ichneumonidae, though the facies of the prepupal stage is retained.

scholarly journals THE ORIGIN AND FATE OF MICROBODIES IN THE FAT BODY OF AN INSECT

1971 ◽  
Vol 48 (1) ◽  
pp. 61-78 ◽  
Author(s):  
M. Locke ◽  
J. T. McMahon
Keyword(s):  
Life History ◽  
Larval Stage ◽  
Insect Cells ◽  
Fat Body ◽  
Urate Oxidase ◽  
The Core ◽  
History Of ◽  
Dense Mass ◽  
Hormonal Milieu ◽  
Larval Molt

The structure and life history of insect microbodies are described during the development of the fat body from the 4th to 5th larval molt through the 5th to pupal molt. The mature microbodies are flattened spheres about 1.1 x 0.9 µ, with a depression on one side where a dense mass connects the limiting membrane to the core of coiled tubules. They contain catalase and urate oxidase. The precise synchrony of development of insect cells during the molt/intermolt cycle makes it easy to study the life history of particular organelles. Phases of growth are correlated with the hormonal milieu. Mature 4th stage microbodies decrease in size before ecdysis to the 5th stage when they atrophy at the same time as the new 5th stage generation arises. The 5th stage microbodies form as diverticula of the RER and, grow while confronted by RER cisternae. The mature microbodies decrease in size when the fat body engages in massive larval syntheses. At the end of the 5th larval stage, the microbodies are invested by isolation membranes and destroyed before pupation. There are thus two mechanisms for microbody destruction: atrophy of the 4th stage organelles and isolation with autophagy at the end of the 5th stage.

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