scholarly journals The larvae of two closely-related blowfly species of the genus Chrysomya (Diptera, Calliphoridae)

1990 ◽  
Vol 1 (3) ◽  
pp. 151-153 ◽  
Author(s):  
Zakaria Erzinclioglu
Keyword(s):  
Larval Stage ◽  
Diagnostic Feature ◽  
Chrysomya Megacephala ◽  
The Third ◽  
Recent Introduction ◽  
Third Instar Larvae

The third instar larvae of two closely-related blowfly species, Chrysomya megacephala (Fabricius) and Chrysomya regalis Robineau-Desvoidy (=marginalis Wiedemann) are described and illustrated, and a simple key is given to separate them. As with some other blowfly larvae, it was found that the structure of the spines was a most useful diagnostic feature. Although the natural ranges of these two species do not overlap to any extent, the recent introduction of Ch. megacephala into Africa (part of the range of Ch. regalis) makes it desirable to separate these two species in the larval stage.

scholarly journals Larval predation on different instars in blowfly populations

2004 ◽  
Vol 47 (6) ◽  
pp. 887-894 ◽  
Author(s):  
Lucas Del Bianco Faria ◽  
Wesley Augusto Conde Godoy ◽  
Sérgio Furtado dos Reis
Keyword(s):  
Larval Stage ◽  
Choice Experiments ◽  
Predation Rate ◽  
Predatory Behavior ◽  
Larval Instars ◽  
Chrysomya Megacephala ◽  
Chrysomya Albiceps ◽  
Cochliomyia Macellaria ◽  
Third Instar Larvae

During its larval stage, Chrysomya albiceps (Diptera: Calliphoridae) is a facultative predator on other blowflies. In this study, we evaluated the predation by third instar larvae of C. albiceps on first, second and third instar larvae of Chrysomya megacephala and Cochliomyia macellaria in no-choice experiments in order to compare the vulnerability of larval instars to predation. With first and second instar prey the highest predation rate by C. albiceps was on C. megacephala. For third instar prey, the highest predation rate was on C. macellaria. With second instar prey, there was complete predation on C. megacephala within 90 min, whereas in C. macellaria only 55% of the larvae were eaten by 90 min. For third instar prey most predation on C. macellaria (80%) occurred within 90 min, whereas in C. megacephala only 35% of the larvae were eaten by 90 min. Chrysomya albiceps changes the predatory behavior on its preys depending on which instar and species it will consume.

Host choice, settling and folding leaf behaviors of the larval rice leaf folder under heat stress

2016 ◽  
Vol 106 (6) ◽  
pp. 809-817 ◽  
Author(s):  
M.A. Bodlah ◽  
A.-X. Zhu ◽  
X.-D. Liu
Keyword(s):  
Heat Stress ◽  
High Temperature ◽  
Host Choice ◽  
Cnaphalocrocis Medinalis ◽  
Behavioral Traits ◽  
The Third ◽  
Rice Leaf ◽  
Rice Leaf Folder ◽  
Extreme High Temperature ◽  
Third Instar Larvae

AbstractExtreme high-temperature events are the key factor to determine population dynamics of the rice leaf folder,Cnaphalocrocis medinalis(Guenée), in summer. Although we know that adult of this insect can migrate to avoid heat stress, the behavioral response of larva to high temperature is still unclear. Therefore, impacts of high temperature on behavioral traits ofC. medinalisincluding host choice, settling and folding leaf were observed. The results revealed that these behavioral traits were clearly influenced by high temperature. The larvae preferred maize leaves rather than rice and wheat at normal temperature of 27°C, but larvae experienced a higher temperature of 37 or 40°C for 4 h preferred rice leaves rather than maize and wheat. Capacity of young larvae to find host leaves or settle on the upper surface of leaves significantly reduced when they were treated by high temperature. High temperature of 40°C reduced the leaf-folding capacity of the third instar larvae, but no effects were observed on the fourth and fifth instar larvae. Short-term heat acclimation could not improve the capacity of the third instar larvae to make leaf fold under 40°C.

scholarly journals Efficacy of Bacillus thuringiensis (Berliner) isolates on fig moth, Ephestia cautella (Walker) Larvae

2014 ◽  
Vol 11 (2) ◽  
pp. 943-951
Author(s):  
Baghdad Science Journal
Keyword(s):  
Bacillus Thuringiensis ◽  
Larval Stage ◽  
Filter Paper ◽  
Larval Instar ◽  
Ephestia Cautella ◽  
Larval Stages ◽  
The Third ◽  
Total Percentage ◽  
First Instar ◽  
Paper Method

The following dilution 5×10-1, 10-1, 10?2 , 10-3 gm/L for the indigenous isolate of Bacillus thuringiensis bacteria and the commercially isalate were used for experiments against the different stages of fig moth of E.cautella which exposed by filter paper method. The results showed that mortality of larval stages was increased with the increasing concentration of the biocide, in addition to increase in the mortality of the larval stages reached to the highest percentage in the third days of treatment of the larval stage in comparison with the first and second days of exposure. The results also showed that the sensitivity of larval stages was increased in first and second instars while reduced in the last instars .The high percentage of first instar mortality for the indigenous isolate in the concentration of 5×10-1 was 72.8% , while the low percentage of mortality showed in the concentration of 5×10-1 for the fifth instar larvae which was 13.3% in third days of treatment while a high percentage of mortality was showed for the first instar larvae for the commercially isulate in the concentration of 5×10-1 was 59.4% Furthermore, low percentage of mortality was shown in the concentration of 5×10-1 in fifth instar larval which was 8.3% in the third days of treatment. The results also showed that the indigenous isolated was more effective than the commercially produced bacteria for killing larval instars of fig moth E.cautella .The total percentage of larval instar mortality reached to 44.5 % after the third days of treatment in concentration 5×10-1 in the indigenous isolate , and it was 33.8 % in the commercially produced bacteria .

scholarly journals STUDY ON SURVIVABILITY OF NEWLY HATCHED LARVAE OF TWO SPECIES OF PEPPERMINT SHRIMP FED WITH DIFFERENT COMBINATIONS AND DENSITIES OF LIVE FOODS

2019 ◽  
Vol 14 (1) ◽  
pp. 15
Author(s):  
Indra Pratama ◽  
Hatim Albasri
Keyword(s):  
Survival Rate ◽  
Larval Stage ◽  
Survival Rates ◽  
The Third ◽  
Randomized Design ◽  
Average Survival ◽  
Peppermint Shrimp ◽  
Trial Treatment ◽  
Newly Hatched Larvae ◽  
Average Survival Rate

This study was aimed to evaluate different types and combinations of live foods in relation to the survivability of newly hatched Lysmata vittata and Lysmata intermedia larvae. The experiment consisted of three trials (different species, combinations, and densities of live foods) arranged in a completely randomized design. The first and second trials were subjected to L. vittata with three treatments for each trial (1A, 1B, 1C for trial-1; 1D, 1E, 1F for trial-2). The third trial consisted of two treatments (2A and 2B) tested on L. intermedia. Each treatment had three replicates. The results showed that the survival rates were low in all treatments. However, each treatment showed a significant effect (P<0.05) on the average survival rate of L. vittata and L. intermedia larvae. In the first trial, treatment 1C was the only one that had survived larvae after day 35 with 4.44% of final average survival rate (FASR). Four of the larvae reached the post-larval stage. In the second trial, treatment 1F showed a better condition than the other treatments with 5.56% FASR. Nevertheless, no larvae in the second trial had transformed to post-larval stage before the experiment ended at day 46. In the third trial, no larvae survived to reach the post-larval stage. In spite of this, treatment 2B had better daily average survival rate (DASR) than treatment 2A. This research concludes that the use of copepods as live food at an early larval stage and Artemia at a later stage is relatively more effective to improve the survival rate of peppermint shrimp larvae.

Identification of larvae of two Aphodius Helwig, 1798 (Coleoptera: Scarabaeidae: Aphodiinae) species using morphology and DNA barcode

Zootaxa ◽  
2021 ◽  
Vol 5047 (2) ◽  
pp. 153-164
Author(s):  
ANDREY V. FROLOV ◽  
MARIA S. VISHNEVSKAYA ◽  
LILIA A. AKHMETOVA
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Dna Barcode ◽  
The Third ◽  
Coi Sequences ◽  
First Time ◽  
Scanning Electron ◽  
Third Instar Larvae

The third instar larvae of Aphodius (Alocoderus) hydrochaeris (Fabricius, 1798) and A. (Bodilus) ictericus (Laicharting, 1781) are described based on scanning electron microscopy and COI sequences. COI barcode sequence for A. (A.) hydrohaeris is provided for the first time. Two haplotypes are discovered in A. (B.) ictericus.  

scholarly journals Morphology of immature stages of Paraegidium costalimai (Coleoptera: Scarabaeidae: Orphninae) and remarks on egg-busters in Scarabaeidae first‑instar larvae

2020 ◽  
Author(s):  
Rafael Clayton De Jesus e Sousa ◽  
Juares Fuhrmann
Keyword(s):  
Comparative Study ◽  
New World ◽  
Immature Stages ◽  
Old World ◽  
The Third ◽  
First Instar ◽  
Third Instar Larvae

Studies about the immature stages of Orphninae (Coleoptera: Scarabaeidae) species are scarce. The subfamily includes 214 species, but only 5 have the immature stages described: Chaetonyx robustus liguricus Mariani, 1946, Hybalus benoiti Tournier, 1864, H. rotroui Petrovitz, 1964 and Triodontus nitidulus (Guérin, 1844) from Old World; and Aegidium cribratum Bates, 1887 from the New World. The Neotropical genus Paraegidium Vulcano, Pereira & Martinez, 1966 encompass five species, mainly recorded from Brazil. Herein, the immature stages of P. costalimai Vulcano, Pereira & Martinez, 1966 are described and illustrated, along with remarks on the presence of egg-buster in Scarabaeidae first-instar larvae. A key to the third-instar larvae of known Orphninae and a comparative study of chaetotaxy are also provided.

LIFE CYCLE OF THE NYMPH FLY PALAEODIPTERON WALKERI IDE 1965 (DIPTERA: NYMPHOMYIIDAE) IN THE WHITE MOUNTAINS OF SOUTHERN QUÉBEC

1989 ◽  
Vol 121 (7) ◽  
pp. 603-607 ◽  
Author(s):  
P.P. Harper ◽  
Michel Lauzon
Keyword(s):  
Life Cycle ◽  
Larval Stage ◽  
White Mountains ◽  
Larval Instars ◽  
The Third ◽  
Summer Generation

AbstractCollections of larvae over 1 year in the River Clinton in the White Mountains of southern Québec indicated that Palaeodipteron walkeri Ide is bivoltine and that there are five larval instars. In April, larvae were in their fourth and fifth instars. Adults emerging in May and June gave rise to a summer generation in which most individuals emerged in August and September. The offspring of these adults, together with stragglers from the summer generation, formed an overwintering generation. Overwintering was completed in the larval stage, mainly the third and fourth instars. There was some growth in winter and development increased in the spring. Our data were compared with previously published observations; although no discrepancy occurred, our interpretation was different. Previous schemes proposed for the life cycle in this species were based on few specimens and lacked winter observations.

scholarly journals Description of the third instar larvae of five species of Cyclocephala (Coleoptera, Melolonthidae, Dynastinae) from Mexico

2014 ◽  
Vol 58 (3) ◽  
pp. 219-228 ◽  
Author(s):  
Miguel A. Morón ◽  
Gabriel A. Lugo-García ◽  
Agustín Aragón-García
Keyword(s):  
The Third ◽  
Third Instar Larvae

NATURAL MORTALITY OF THE PINE SHOOT MOTH, RHYACIONIA BUOLIANA (SCHIFF.) (LEPIDOPTERA: OLETHREUTIDAE), IN ENGLAND

1960 ◽  
Vol 38 (4) ◽  
pp. 755-768 ◽  
Author(s):  
P. Harris
Keyword(s):  
Differential Survival ◽  
Trichogramma Evanescens ◽  
Annual Fluctuation ◽  
The Third ◽  
Internal Parasites ◽  
Causes Of Mortality ◽  
Total Proportion ◽  
Cool Summer ◽  
One Year ◽  
Third Instar Larvae

A population of R. buoliana infesting a young Scots pine plantation was followed through three generations. The most important causes of mortality in the population were an egg parasite, probably Trichogramma evanescens; the failure of the third instar larvae to establish themselves in the buds; two external parasites, Scambus sagax attacking the larvae in the autumn and Exeristes ruficollis attacking the larvae in the spring; three internal parasites, Orgilus obscurator, Temelucha interrupter, and Eulimneria rufifemur, attacking the larvae in the autumn but killing it in the spring after the trees were damaged; and a fungus, Paecilomyces farinosus, that usually killed the larvae in the autumn. The total proportion of the population killed by parasites and fungus was usually constant from one year to the next, though the abundance of T. interruptor increased.Most of the annual fluctuation in abundance of the moth was caused by the differential survival of the third instar larvae. After a cool summer the third instar larvae were not developed until September and most of them failed to establish themselves in the buds and perished. On the other hand in a warm summer when the larvae developed earlier and attacked the buds in July, most of them were successful.

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