scholarly journals Biology and Predation of Stethorus punctillum Weise (Coleoptera: Coccinellidae) feeding on Tetranychus urticae Koch

1970 ◽  
Vol 15 ◽  
pp. 1-5 ◽  
Author(s):  
GC Biswas ◽  
W Islam ◽  
MM Haque
Keyword(s):  
Tetranychus Urticae ◽  
Developmental Stages ◽  
Instar Larva ◽  
Predation Rate ◽  
Fourth Instar ◽  
Fourth Instar Larva ◽  
First Instar ◽  
Different Seasons ◽  
Two Spotted Spider Mite ◽  
Stethorus Punctillum

The duration of hatching, larval instars and pupal stages of Stethorus punctillum feeding on two-spotted spider mite, Tetranychus urticae were investigated in different seasons under laboratory conditions. The highest values of different developmental stages were obtained during winter. Higher temperature significantly reduced the duration of different developmental stages. No significant effect of relative humidity was exerted on the development stages of S. punctillum. The predation rate of fourth instar larva of S. punctillum was the highest whereas the first instar larva consumed the lowest number of prey. The fourth instar larva of the predator consumed 135.8 eggs, 126.4 larvae, 96.6 nymphs and 72.8 adults per day separately. But the first instar consumed 41.6 eggs, 36.2 larvae, 26.8 nymphs and 16.8 adults during the same period. Keywords: Developmental durations, predation, Tetranychus urticae, Stethorus punctillum   doi: 10.3329/jbs.v15i0.2196 J. bio-sci. 15: 1-5, 2007

Observations on the Effect of Exposure to a Low Temperature on Laemophloeus minutus (Ol.) (Col. Cucujidae)

1954 ◽  
Vol 45 (2) ◽  
pp. 351-359 ◽  
Author(s):  
Gwyneth C. Williams
Keyword(s):  
Low Temperature ◽  
Adult Male ◽  
Developmental Stages ◽  
Instar Larva ◽  
Fourth Instar ◽  
Fourth Instar Larva ◽  
Atmospheric Humidity ◽  
Larval Instars ◽  
Limited Period

Experiment showed that all developmental stages of Lacemophloeus minutus (Ol.) can survive exposure to a temperature of + 2°C. for a limited period which varies with the instar.The egg was more susceptible to such exposure than any other stage, followed by the first, second and third larval instars and the adult, which did not differ significantly from each other, and then by the fourth-instar larva and pupa which can also be grouped together.The adult male proved 1·21 times more susceptible than the female to the effects of exposure.Atmospheric humidity did not influence the mortality of eggs or adults. Previous starvation did not affect the mortality of adults subsequently exposed to + 2°C.

Description of the pupa and additional characters of the fourth-instar larva, female, and male genitalia of Uranotaenia (Uranotaenia) coatzacoalcos Dyar & Knab, with keys for the identification of Mexican species of Uranotaenia (Diptera: Culicidae)

Zootaxa ◽  
2019 ◽  
Vol 4608 (2) ◽  
pp. 247
Author(s):  
KARINA D. RIVERA-GARCÍA ◽  
ABRIL RÍSQUEZ-PÉREZ ◽  
SERGIO IBÁÑEZ-BERNAL
Keyword(s):  
Urban Areas ◽  
Male Genitalia ◽  
Developmental Stages ◽  
Pupal Stage ◽  
Instar Larva ◽  
Fourth Instar ◽  
Morphological Description ◽  
Vector Surveillance ◽  
Fourth Instar Larva ◽  
Diagnostic Characteristics

Eleven species of Uranotaenia, one belonging to the subgenus Pseudoficalbia and ten to the subgenus Uranotaenia, have been recorded in Mexico. In general, two species are commonly recorded in urban areas by the vector surveillance programs, but the other species are rarely collected as they occupy habitats in non-anthropized environments, and for that reason they remain poorly known. Some of the species recorded in Mexico have not been described in the pupal stage and other developmental stages have only been partially described, making their recognition difficult. One of these species is Uranotaenia (Uranotaenia) coatzacoalcos Dyar & Knab, as a complete description of its larval chaetotaxy is not available, and the pupa has not been described. In this report, we provide a complete morphological description of the fourth-instar larva, the first description of the pupa, and a review of the female and male diagnostic characteristics useful for recognition of the species. We also provide keys in English and Spanish for the recognition of the larvae, pupae, females, and male genitalia of the species of Uranotaenia recorded in Mexico. 

Accumulation of cadmium by the fourth instar larva of the fly Chironomus thummi

1986 ◽  
Vol 18 (3) ◽  
pp. 395-405 ◽  
Author(s):  
Lisa A. Seidman ◽  
Gerald Bergtrom ◽  
David J. Gingrich ◽  
Charles C. Remsen
Keyword(s):  
Instar Larva ◽  
Fourth Instar ◽  
Fourth Instar Larva ◽  
Chironomus Thummi

scholarly journals Anopheles (Nyssorhynchus) deaneorum: a new species in the albitarsis complex (Diptera: culicidae)

1989 ◽  
Vol 84 (4) ◽  
pp. 535-543 ◽  
Author(s):  
Maria Goreti Rosa-Freitas
Keyword(s):  
New Species ◽  
Genetic Distance ◽  
Adult Female ◽  
Instar Larva ◽  
Fourth Instar ◽  
Type Locality ◽  
Fourth Instar Larva ◽  
External Appearance ◽  
A New Species ◽  
Nei's Genetic Distance

Anopheles (Nyssorhynchus) deaneorum sp. n. is described from specimens collected in Guajará-Mirim, Rondônia state and Rio Branco, Acre state, Brazil, on human and animal baits, inside dwellings and from the progenies of engorged females. A detailed description of the shape of egg, external appearance of adult female and male, genitalias, female cibarial armature and complete chaetotaxy of pupa and larva show that it can be distinguished from Anopheles albitarsis from the type-locality and other areas by the paler general external appearance of the adult, the posterolateral tufts of scales, on the female abdominal terga and the branching of the outer anterior clypeal seta (3-C) of the fourth instar larva (as shown in illustrations). If species can also be distinguished from An. albitarsis from the type locality by the allele frequencies at 11 enzymic loci as represented by Nei's Genetic Distance.

Description of the fourth‐instar larva of Coquillettidia linealis (Diptera: Culicidae)

2020 ◽  
Vol 59 (1) ◽  
pp. 119-126
Author(s):  
Petrina H Johnson ◽  
Richard C Russell
Keyword(s):  
Instar Larva ◽  
Fourth Instar ◽  
Fourth Instar Larva

scholarly journals Anopheles (Cellia) rampae n. sp., alias chromosomal form K of the Oriental Maculatus Group (Diptera: Culicidae) in Southeast Asia

Zootaxa ◽  
2011 ◽  
Vol 2810 (1) ◽  
pp. 47 ◽  
Author(s):  
PRADYA SOMBOON ◽  
DAMRONGPAN THONGWAT ◽  
RALPH E. HARBACH
Keyword(s):  
Southeast Asia ◽  
Sibling Species ◽  
Male Genitalia ◽  
Instar Larva ◽  
Fourth Instar ◽  
Fourth Instar Larva ◽  
Chromosomal Form ◽  
Oriental Region ◽  
As Species

Chromosomal form K (also known as species K) of the Anopheles maculatus group of sibling species in the Oriental Region is diagnosed and formally named An. (Cellia) rampae Harbach & Somboon, n. sp. The male genitalia, pupa and fourth-instar larva are illustrated and information is provided on the morphology, systematics, bionomics and distribution of the species.

A new species of the genus Ablabesmyia Johannsen from the Neotropics and description of the pupa of Ablabesmyia bianulata Paggi (Diptera: Chironomidae: Tanypodinae)

Zootaxa ◽  
2010 ◽  
Vol 2386 (1) ◽  
pp. 49 ◽  
Author(s):  
AUGUSTO SIRI ◽  
ANALÍA C. PAGGI
Keyword(s):  
New Species ◽  
Buenos Aires ◽  
Instar Larva ◽  
Color Pattern ◽  
Fourth Instar ◽  
Buenos Aires Province ◽  
Fourth Instar Larva ◽  
Male Adult ◽  
A New Species ◽  
Male Pupa

The male, pupa and fourth instar larva of Ablabesmyia platensis sp. n. from La Plata, Buenos Aires province, Argentina and the pupa of A. bianulata Paggi collected in southern Argentina are described and figured. The male adult diagnosis of A. bianulata is emended, and the aedeagal complex is redescribed and photographed. Differences in the aedeagal complex and the color pattern of the pupa mainly distinguish these two species. The new species is also compared with the Neotropical A. oliveirai Oliveira et Gessner.

The Old World biting midge, Forcipomyia (Lepidohelea) pulcherrima SANTOS ABREU, new to the fauna of the United States (Diptera: Ceratopogonidae)

2013 ◽  
Vol 82 (4) ◽  
pp. 287-302
Author(s):  
William L. Grogan ◽  
Lawrence J. Hribar ◽  
Francis G. Howarth
Keyword(s):  
United States ◽  
Instar Larva ◽  
The United States ◽  
Fourth Instar ◽  
Fourth Instar Larva ◽  
Old World ◽  
Biting Midge ◽  
First Time

ABSTRACT We provide the first United States records of the Old World biting midge, Forcipomyia (Lepidohelea) pulcherrima SANTOS ABREU (Diptera: Ceratopogonidae), from California, Florida and Hawaii. The fourth instar larva of F. pulcherrima is also described and illustrated for the first time.

Description of the immatures of the predaceous midge Bezzia blantoni Spinelli & Wirth (Diptera: Ceratopogonidae)

Zootaxa ◽  
2009 ◽  
Vol 2295 (1) ◽  
pp. 46-54 ◽  
Author(s):  
MARIA M. RONDEROS ◽  
GUSTAVO R. SPINELLI
Keyword(s):  
Electron Microscope ◽  
Phase Contrast ◽  
Instar Larva ◽  
Fourth Instar ◽  
Phase Contrast Microscopy ◽  
Fourth Instar Larva ◽  
Contrast Microscopy ◽  
Breeding Location ◽  
First Time ◽  
Scanning Electron

The fourth instar larva and pupa of Bezzia blantoni Spinelli & Wirth (1989) are described, illustrated and photomicrographed by using phase-contrast microscopy and Scanning Electron Microscope (SEM). The larva, which shows features typical to carnivorous larvae, is compared with that of B. roldani Spinelli & Wirth. The species is recorded for the first time from the Martín García island, located in the La Plata river between Argentina and Uruguay. Details of the biology traits, breeding location and feeding behavior are given.

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