scholarly journals Effect of different larval instars of Phyllocnistis citrella Stainton on some biological aspects of Chrysoperla carnea (Stephens) (Neuroptera: Chrysopidae) under laboratory conditions

2014 ◽  
Vol 7 (2) ◽  
pp. 171-179
Author(s):  
Gharib M. ◽  
Megahed M. ◽  
Wael Sameer ◽  
Fouad Ali
Keyword(s):  
Chrysoperla Carnea ◽  
Phyllocnistis Citrella ◽  
Larval Instars ◽  
Laboratory Conditions ◽  
Biological Aspects

scholarly journals Toxicity of Imidacloprid and Diafenthiuron to Chrysoperla Carnea (Stephens) (Neuroptera: Chrysopidae) in the Laboratory Conditions

2009 ◽  
Vol 49 (3) ◽  
pp. 290-296 ◽  
Author(s):  
Gnanadhas Preetha ◽  
Johnson Stanley ◽  
Thiagarajan Chandrasekaran ◽  
Sasthakutty Kuttalam
Keyword(s):  
Plant Protection ◽  
Larval Mortality ◽  
Plant Protection Products ◽  
Threshold Level ◽  
Adult Mortality ◽  
Recommended Dose ◽  
Chrysoperla Carnea ◽  
Laboratory Studies ◽  
Egg Mortality ◽  
Laboratory Conditions

Toxicity of Imidacloprid and Diafenthiuron toChrysoperla Carnea(Stephens) (Neuroptera: Chrysopidae) in the Laboratory ConditionsInsecticides are unavoidable in pest management programs especially when the pest crosses Econimic Threshold Level (ETL). Nevertheless, often the plant protection products kill the natural enemy population making the pest to resurge and thus demanding more sprays. Therefore, insecticides used in IPM programs should be selective enough to spare the beneficials. Laboratory studies were conducted to find out the toxicity of imidacloprid and diafenthiuron to the eggs, larvae and adults ofChrysoperla carnea.Imidacloprid at the recommended dose of 0.28 ml/l caused 15.38% egg mortality, 26.67 and 33.33% larval mortality by ingestion and contact, respectively and 50.00% adult mortality. The egg mortality was about 15.38% and larval mortality of 23.33% and adult mortality of 26.67% was caused by diafenthiuron. Based on the classification given by IOBC/WPRS working group on Pesticides and non-target invertebrates, both the insecticides were classified as harmless toC. carnea, since the recommended dose caused less than 50% mortality in the laboratory conditions.

scholarly journals The efficiency of Paecilomyce farinosus as biocontrol to larve stage on second ad sixith instar larve of Trogoderma granarium (Everts)

2013 ◽  
Vol 10 (4) ◽  
pp. 1096-1101
Author(s):  
Baghdad Science Journal
Keyword(s):  
Larval Instar ◽  
The Other ◽  
Biocontrol Agents ◽  
Larval Instars ◽  
Paecilomyces Farinosus ◽  
Trogoderma Granarium ◽  
Laboratory Conditions ◽  
Other Hand ◽  
Laboratory Results ◽  
Treatment Concentration

The present study was conducted to determine the pathogenicity of Paecilomyces farinosus as biocontrol agents against Tragoderma granarium (khapra) under laboratory conditions with three concentrations ( 2.8 x 108 , 2.8 x 106 ,2.8 x104 spores/ ml). The laboratory results revealed that fungi showed it's higher pathogencity to larve stage on 2nd instar and 6th instar , although their capability differs according to the fungi concentrations this fungi caused higher mortality of 2nd larval instar 70% and 60% ,55% when it was used at concentrations 2 .8 x 106 ,2.8 x104 spores/ ml respectively. On the other hand on 6th larval instars 55% , 35% , 30% at concentrations ( 2.8 x 108 , 2.8 x 106 ,2.8 x104 spores/ ml) respectively, and the highest rate of distortions in the adult insects from the 2nd instar treatment than the adult insects from the 6th instar treatment concentration of this fungi.

Description of life cycle and preimaginal stages of Alecton discoidalis Laporte, 1833 (Coleoptera: Lampyridae) under laboratory conditions

Zootaxa ◽  
2020 ◽  
Vol 4816 (1) ◽  
pp. 81-91 ◽  
Author(s):  
ORMAILY MADRUGA ◽  
MARC A. BRANHAM
Keyword(s):  
Egg Production ◽  
Body Shape ◽  
Adult Stage ◽  
Widespread Species ◽  
Larval Instars ◽  
General Body ◽  
Laboratory Conditions ◽  
Preimaginal Stages ◽  
Terrestrial Snails ◽  
Western Half

Alecton discoidalis Laporte, 1833 is the most widespread species of the only firefly genus endemic to Cuba. It is commonly found in limestone landscapes across the western half of the country. Larvae of A. discoidalis were collected at Pan de Matanzas and reared through the adult stage under laboratory conditions. Larvae were fed mainly terrestrial snails from the families Potamiidae and Helicinidae. Alecton discoidalis underwent between four and eight larval instars. Females had more larval instars than males likely due to the need to gain more body mass for egg production. Eggs, larvae and pupae are described and illustrated, with emphasis on general body shape, as well as details of the larval head, antennae and mouthparts. Alecton discoidalis females are both brachypterous and physogastric. 

scholarly journals Bio-control efficiency of Bacillus thuringiensis (Berliner) against the citrus leaf miner, Phyllocnistis citrella Stainton (Lep., Gracillariidae) under laboratory conditions

2016 ◽  
Vol 48 (3) ◽  
pp. 355
Author(s):  
K. Saeidi ◽  
E. Saeidi
Keyword(s):  
Bacillus Thuringiensis ◽  
Plant Protection ◽  
Ornamental Plants ◽  
Leaf Miner ◽  
Phyllocnistis Citrella ◽  
Citrus Leaf ◽  
Control Efficiency ◽  
Laboratory Conditions

The citrus leaf miner, <em>Phyllocnistis citrella</em> Stainton (Lep., Gracillariidae), is one of the most destructive pest of citrus and related Rutaceae and ornamental plants in Iran. Larvae damage leaves by creating serpentine feeding mines, which have been lead to reduce yield. Resistance and toxicity problems derived from synthetic insecticides have made it necessary to find more effective and healthier alternatives; therefore, bio-insecticides (<em>i.e</em>., <em>Bacillus thuringiensis</em>) are becoming an important component in plant protection. The aim of the present study was to evaluate the efficiency of <em>B. thuringiensis</em> against <em>P. citrella</em>. Eight <em>B. thuringiensis</em> concentrations were used against <em>P. citrella</em> L3 on orange and mortality was recorded at 1, 4, 7 and 10 days after spraying. The results showed that <em>B. thuringiensis</em> significantly affected mortality of <em>P. citrella</em>. After 1, 4, 7 and 10 days of spraying 108 concentration of <em>B. thuringiensis</em> had significantly caused the highest mortality to the pest with 59.8, 68.4, 73.6 and 77.0%, respectively. Then the mortality percent decreased until it reached 6.5, 9.5, 39.3 and 46.7% at 101 concentration, respectively. In conclusion, the study indicated that <em>B. thuringiensis</em> is effective in controlling <em>P. citrella</em> under laboratory conditions.

scholarly journals Larval morphology ofMetaphycus flavusand its role in host attachment and larval cannibalism

2011 ◽  
Vol 101 (3) ◽  
pp. 365-372 ◽  
Author(s):  
A. Tena ◽  
A. Kapranas ◽  
G.P. Walker ◽  
F. Garcia-Marí ◽  
R.F. Luck
Keyword(s):  
Aqueous Medium ◽  
Fourth Instar ◽  
Larval Morphology ◽  
Sensory Organs ◽  
Larval Instars ◽  
Laboratory Conditions ◽  
Different Types ◽  
Aggressive Behaviours ◽  
Gustatory Sensilla

AbstractMetaphycus flavus(Howard) (Hymenoptera: Encyrtidae) is a facultatively gregarious endoparasitoid of soft scales (Hemiptera: Coccidae). When it develops in superparasitised hosts, the larvae often attack and consume brood mates six or more days post oviposition. Under our laboratory conditions (25±1°C and 14 hours of light followed by 18±1°C and ten hours of darkness in 50–70% R.H.),M. flavuseggs hatched three days after oviposition. Measurements of the mandibles and tentorium indicate there are four larval instars, andM. flavusreaches the fourth instar by day six post oviposition, and pupates on day eight. Thus, cannibalism amongM. flavuslarvae occurs during the fourth instar. During this instar,M. flavuslarvae separate from their attachment to the scale cuticle, to which they were tethered by a respiratory structure during the previous three larval instars. Once detached, they are free to move within the scale, which increases the probability of larval encounters and aggressive behaviours. Moreover, the mandibles of the fourth instar are better adapted for fighting than are those of the first three larval instars, since they are larger and more sclerotized. The cranium and mouthparts ofM. flavushave four different types of sensory organs, some of which are almost certainly olfactory, an unexpected function for a larva that presumably is surrounded by an aqueous medium where gustatory sensilla would seem to be more appropriate. The cranium also bears two pairs of what appear to be secretory pores.

scholarly journals Biological aspects of immature stage of Nyssomyia whitmani (Antunes and Coutinho) (Diptera, Psychodidae, Phlebotominae) in laboratory conditions

2015 ◽  
Vol 59 (2) ◽  
pp. 100-103 ◽  
Author(s):  
Letícia Moraes Ribeiro ◽  
Elisa Teruya Oshiro ◽  
Daiana Alovisi de Souza ◽  
Magda Freitas Fernandes ◽  
Kleiton Maciel dos Santos ◽  
...  
Keyword(s):  
Immature Stage ◽  
Laboratory Conditions ◽  
Biological Aspects

Ephialtes brevicornis (Grav.) as an External Parasite of the Diamond-back Moth, Plutella maculipennis (Curt.)

1957 ◽  
Vol 48 (3) ◽  
pp. 477-488 ◽  
Author(s):  
A. M. Stuart
Keyword(s):  
Life Cycle ◽  
General Description ◽  
Prepupal Stage ◽  
Larval Instars ◽  
Laboratory Conditions

Ephialtes brevicornis (Grav.) has been found to parasitise the prepupal stage of Plutella maculipennis (Curt.) under laboratory conditions.A general description of the life-cycle of E. brevicornis on P. maculipennis is given and it is found to occupy 16 days from egg to adult at 20°C. and a R.H. of 60 per cent. Comparative descriptions are given of the five larval instars. The egg is also described.

Comparative larval morphology of Platydracus and Staphylinus (Staphylinidae: Staphylinini: Staphylinina) with notes on their biology and redescription of the pupa of Staphylinus

Zootaxa ◽  
2012 ◽  
Vol 3580 (1) ◽  
pp. 24 ◽  
Author(s):  
EWA PIETRYKOWSKA-TUDRUJ ◽  
BERNARD STANIEC
Keyword(s):  
Life History ◽  
Structural Features ◽  
Larval Morphology ◽  
Mature Larva ◽  
Larval Instars ◽  
History Data ◽  
Generic Status ◽  
Life History Data ◽  
Laboratory Conditions ◽  
First Time

The mature larva of Platydracus latebricola (Gravenhorst, 1806) is described for the first time and the larva and pupa of Staphylinus erythropterus Linné, 1758 are redescribed. Illustrations of structural features are provided. The combination of characters that allow for distinguishing the known mature larvae of Platydracus, and larvae and pupae of Staphylinus from closely related genera within tribe Staphylinini are given. The mature larvae of Platydracus and Staphylinus are compared and the generic status of the former is confirmed. Life history data under laboratory conditions of S. erythropterus are provided. Two larval instars in this species, a state unique within the tribe Staphylinini was reported.

Biological aspects of Amblyomma brasiliense (Acari: Ixodidae) under laboratory conditions

2008 ◽  
Vol 44 (1) ◽  
pp. 43-48 ◽  
Author(s):  
Gustavo S. Sanches ◽  
Gervásio H. Bechara ◽  
Marcos V. Garcia ◽  
Marcelo B. Labruna ◽  
Matias P. J. Szabó
Keyword(s):  
Laboratory Conditions ◽  
Biological Aspects
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