scholarly journals Efficacy of Two Predatory Coccinellid Specie Feeding on Different Desities of Bemisia Tabaci (Homoptera : Aleyrodidae) Nymphs in The Laboratory

2021 ◽  
Vol 910 (1) ◽  
pp. 012029
Author(s):  
Dhurgham Sahib Jawad ◽  
Yousif Dakheel Rashid ◽  
Abbas Ghanim Hamzah
Keyword(s):  
Bemisia Tabaci ◽  
Technical College ◽  
Direct Proportion ◽  
Fourth Stage ◽  
Larval Phase ◽  
Daily Average ◽  
Adult Phase ◽  
Technical University ◽  
Predatory Coccinellid

Abstract Aseries of experiments were conducted laborators of biollogical control in the postgraduate laboratory at the Al-Mussaib Technical College, AL-Furat Al-Awsat Technical University-Iraq in 2020, The larval and adult phase of Hippodamia variegate and Coccinella Septempunctata.L were reard on different densities of Bemisia tabaci nymphs to reveae theis predation and the effect on this longevity too: The average number of predation whitefly nymphs per day from each age larvae and adults of the thirteen-spoted ladybird H. variegate and the seven- spoted ladybird C. Septempunctata. L was in direct proportion to the increase in the density of the whitefly nymphs supplied for it daily, The highest average of thirteen point ladybird larvae was (48.60) at density (64) nymphs/whitefly at the first larval phase. While the lowest rate of first-stage larvae was (6.40) at density (2) nymphs/whitefly for the same larval phase, while the highest average of fourth-stage larvae was (131.20) at density (64) nymphs/whitefly. While the lowest average of the fourth larvae phase was (39.20) at density (8) nymphs/whitefly, As for the seven- spoted ladybird, the highest average of first-phase larvae reached (53.80) at density (64) nymphs/whitefly, while the lowest average of first-phase larvae reached (5.40) at density (2) nymphs/whitefly for the same larval phase. While the highest average of fourth phase larvae was (160.40) at density (64) nymph/whitefly, while the lowest average of fourth phase larvae was (46.00) at density (4) nymph/whitefly. The number of whitefly nymphs preyed by the thirteen- spoted ladybird H. variegate is less than the number of whitefly nymphs preyed by the seven- spoted ladybird C. Septempunctata. L. The daily average of predation for male predation ladybirds understudy for whitefly nymphs is less than the daily average for females with significant differences.

Heligmosomoides polygyrus (Nematoda): the influence of dietary protein on the dynamics of repeated infection

1986 ◽  
Vol 229 (1254) ◽  
pp. 69-83 ◽  
Keyword(s):  
Population Dynamics ◽  
Helminth Infection ◽  
Protein Diet ◽  
Acquired Immunity ◽  
Direct Proportion ◽  
Heligmosomoides Polygyrus ◽  
Larval Phase ◽  
Gastrointestinal Helminth ◽  
Repeated Infection ◽  
Ad Libitum

The influence of the protein component in the diet of the host on the population dynamics of gastrointestinal helminth infection was studied by using a mouse – H. polygyrus experimental model. Mice fed a 2% (by mass) protein diet ad libitum maintained body weight during the experiment, but gained weight steadily when fed a diet containing 8% (by mass) protein. When repeatedly infected with 5, 10, 20 or 40 larvae every 2 weeks, the mice fed the 2% (by mass) protein diet accumulated adult worms in direct proportion to exposure to the infective stages. Under similar infection régimes, mice fed an 8% (by mass) protein diet acquired a partly effective immunity to reinfection by the nematode. Acquired immunity was principally manifest as a reduction in the survival of adult worms, although a slight increase in the mortality rate and/or the development time of the tissue-dwelling larval phase was observed. Worm fecundity per head was significantly depressed in hosts fed the 8% protein diet. In conclusion, in these experiments it is demonstrated that the nutritional status of the host can influence the population dynamics of helminth infection.

The Effect of intermittent Starvation upon the Development of Larvae of the Meadow Moth (Loxostege sticticalis, L.)

1935 ◽  
Vol 26 (3) ◽  
pp. 345-354 ◽  
Author(s):  
J. S. Skoblo
Keyword(s):  
Direct Connection ◽  
Direct Proportion ◽  
Larval Phase ◽  
Feeding Regime ◽  
Factors Influencing ◽  
Last Stage ◽  
Starvation Effect ◽  
Intensity Of Feeding ◽  
Complete Metamorphosis ◽  
Food Consumed

1. When studying the effect of intermittent starvation upon the length of development of the larval phase it is necessary to carry out experiments with each stage separately. Ignoring this factor and carrying out experiments on the larval phase as a whole results in serious errors.2. The shorter the periods of feeding and consequently the longer starvation periods during each 24 hours the stronger their effect upon the length of development of each stage.3. More than 50 per cent. of larvae fed only for 2 hours a day and starved for 22 hours accomplish their complete metamorphosis and produce moths that are fully capable of living.4. The length of development of each stage depends upon the feeding regime during the previous stage. Using the same starving regime, development of the last stage is the longer the earlier the stage at which larvae were subjected to this regime.5. At different stages of development larvae react differently to the same starvation regime. Thus starving for 12 hours a day increases the duration of the development of the 3rd stage by 104 per cent. ; that of the 4th stage does not increase at all, while the development of the 5th stage increases only by 31 per cent.6. Nature of food greatly influences the length of development under conditions of intermittent starvation. Starving for 8 hours a day when feeding larvae on wormwood results in greater increase of development than starving for 12 hours a day when feeding on goose-foot.7. All factors influencing the development of the larval phase result in decreasing the weight of the pupae. Decrease in weight of pupae is the greater the longer the starvation periods and the earlier larvae were subjected to starvation effect. Nature of food also highly affects the weight of pupae.8. Intensity of feeding during feeding periods of starving larvae does not decrease as compared to control. With very strongly starving larvae intensiveness of feeding even increases.9. There is no direct proportion between the quantity of excrement passed, that is amount of food consumed and the weight of pupae. The longer the development, the more there are feeding periods and consequently the more excrement passed. Owing to the lengthening of development the most part of substances consumed are spent on vegetative functions ; therefore there cannot exist direct connection between the number of excrement passed and the weight of pupae.

Heartworm disease in a dog in the region of Maringá, PR, Brasil – case report

2020 ◽  
Vol XXV (147) ◽  
pp. 52-63
Author(s):  
Carlos Maia Bettini ◽  
Alefe Caliani Carrera ◽  
Isabela Ferraro Moreno ◽  
Marcela Baggio Luz ◽  
Guilherme B. C. Coelho ◽  
...  
Keyword(s):  
Vena Cava ◽  
Subcutaneous Administration ◽  
Larval Phase ◽  
Adult Form ◽  
Heartworm Disease ◽  
Adult Phase ◽  
Vena Cava Syndrome ◽  
Disease Spreading ◽  
Continuous Use ◽  
Ubiquitous Presence

Heartworm disease (Dirofilaria spp) is zoonosis transmitted by hematophagous mosquitoes. It has a larval phase, microfilaremia, and an adult phase. The infestation with the adult form is typically manifested by the presence of worms in the cardiac chambers, which can cause right congestive heart failure and caudal vena cava syndrome. We describe a case in which microfilaremia was confirmed by rapid ELISA and direct parazitologic examination in an asymptomatic dog in Maringá, PR, region with no previous reports of canine dirofilariasis. Echo Doppler Cardiography showed no evidence of adult form in cardiac chambers of the dog. The patient was treated with subcutaneous administration of ivermectin (50 µg/kg) three times with an interval of 60 days between doses, and doxycycline (10 mg/kg day) for 30 days, along with the third dose of ivermectin. A repellent collar based on imidacloprid was prescribed for continuous use. Sixty day after beginning the treatment, the patient was reevaluated, and blood samples were negative for the presence of microfilariae. Heartworm disease can remain silent in dogs, and it may be emerging in the region. The ubiquitous presence of vectors is a cause for concern and could contribute to disease spreading in the region of North Paraná, Brazil.

scholarly journals PROBLEM OF TENSION OF EDUCATIONAL ENVIRONMENT IN TECHNICAL UNIVERSITY (ON THE EXAMPLE OF A FOREIGN LANGUAGE TRAINING)

PRIMO ASPECTU ◽  
2021 ◽  
pp. 93-98
Author(s):  
Irina V. LEUSHINA ◽  
Igor O. LEUSHIN
Keyword(s):  
Foreign Language ◽  
Technical College ◽  
Educational Environment ◽  
Educational Process ◽  
Educational Systems ◽  
Language Training ◽  
Self Development ◽  
Technical University ◽  
Educational Paradigm ◽  
The University

On the example of foreign language training of a graduate of a technical university, the causes of the problem of intensity of the educational environment are considered. Attention is focused on the need to reassess the role of the student in the educational process and the educational environment of a technical college, an attempt is made to analyze the problem from the standpoint of psychodidactics of educational systems. In interaction of the participants of the educational process the student's subjectness is crucial and its key feature is to change when in contact with the educational environment and other participants in the educational process. One of the main objectives of the university in the light of the competence-based educational paradigm implemented in Russia is the formation, strengthening and development of students' subjectivity. Sustainable student subjectivity, the ability to build and implement the trajectory of self-development on the basis of the principles of education throughout life, is one of the prerequisites for the success and effectiveness of foreign language training of a student in a technical college. Options are offered to regulate the intensity of the educational environment of a technical university, including the preparation of a competence syllabus that acts as a «roadmap» of a future graduate to build an individual educational trajectory along with other participants in the educational process.

Control of the Bemisia tabaci/Tomato yellow leaf curl virus complex on protected tomato crops in Algarve (Portugal)*

EPPO Bulletin ◽  
2002 ◽  
Vol 32 (1) ◽  
pp. 31-35
Author(s):  
A. F. Arsenio ◽  
E. Neto ◽  
N. Ramos ◽  
S. Mangerico ◽  
E. Fortunato ◽  
...  
Keyword(s):  
Bemisia Tabaci ◽  
Tomato Yellow Leaf ◽  
Yellow Leaf ◽  
Virus Complex ◽  
Leaf Curl Virus ◽  
Leaf Curl

Scientific and Standardization Committee Communications Comparison of Test Methods for the Lupus Anticoagulant: International Survey on Lupus Anticoagulants-I (ISLA-1)

1990 ◽  
Vol 64 (03) ◽  
pp. 478-484 ◽  
Author(s):  
Thomas Exner ◽  
Douglas A Triplett ◽  
David A Taberner ◽  
Margaret A Howard ◽  
E Nigel Harris
Keyword(s):  
Lupus Anticoagulant ◽  
Test Methods ◽  
Positive Sample ◽  
Direct Proportion ◽  
Clotting Time ◽  
Preliminary Screening ◽  
Activated Platelets ◽  
Tissue Thromboplastin ◽  
Kaolin Clotting Time ◽  
Induced Defects

SummarySix lyophilized plasma samples were sent to 20 “expert” laboratories for assessment of lupus anticoagulant (LA). Four samples contained pooled LA of graded potency mixed with aged normal plasma. One contained LA plus cephalin phospholipid and one contained a nonspecific venom anticoagulant. Sixteen methods were used overall with some participants using up to 8 methods. Results were scored in regard to the known potencies of LA in the samples and other known induced defects.Activated partial thromboplastin time (APTT) tests used by most participants for preliminary screening were relatively sensitive, but non-specific. Platelet or phospholipid neutralization procedures (PNP) appeared to be sensitive and specific but showed a non-linear response to increased LA content. Kaolin clotting time (KCT) tests showed the most sensitive response to increased LA content but the weaker LA were not scored as abnormal by most laboratories as the samples may have contained platelet fragments. Other commonly used tests such as the tissue thromboplastin inhibition (TTI) test and the dilute Russell’s viper venom test (DRVVT) were carried out somewhat inconsistently. The variability in performance of tests in different laboratories indicates that standardization of methodology is urgently required.Generally it seemed that most clotting tests were “bypassed” by the addition of phospholipid to a known LA-positive sample in apparently direct proportion to their sensitivity. Sample preparation, especially prevention of contamination with activated platelets is a vital preliminary part in the assay of LA.

Plasminogen Depletion during Streptokinase Treatment or Two-Chain Urokinase Incubation Correlates with Decreased Clot Lysability Ex Vivo and In Vitro

1993 ◽  
Vol 70 (06) ◽  
pp. 0998-1004 ◽  
Author(s):  
Páll T Önundarson ◽  
H Magnús Haraldsson ◽  
Lena Bergmann ◽  
Charles W Francis ◽  
Victor J Marder
Keyword(s):  
Myocardial Infarction ◽  
Ex Vivo ◽  
Time Dependent ◽  
State Variables ◽  
Thrombolytic Treatment ◽  
Direct Proportion ◽  
Plasmin Activity ◽  
Plasma Exposure ◽  
The Relationship

SummaryThe relationship between lytic state variables and ex vivo clot lysability was investigated in blood drawn from patients during streptokinase administration for acute myocardial infarction. A lytic state was already evident after 5 min of treatment and after 20 min the plasminogen concentration had decreased to 24%, antiplasmin to 7% and fibrinogen 0.2 g/1. Lysis of radiolabeled retracted clots in the patient plasmas decreased from 37 ± 8% after 5 min to 21 ± 8% at 10 min and was significantly lower (8 ± 9%, p <0.005) in samples drawn at 20, 40 and 80 min. Clot lysability correlated positively with the plasminogen concentration (r = 0.78, p = 0.003), but not with plasmin activity. Suspension of radiolabeled clots in normal plasma pre-exposed to 250 U/ml two-chain urokinase for varying time to induce an in vitro lytic state was also associated with decreasing clot lysability in direct proportion with the duration of prior plasma exposure to urokinase. The decreased lysability correlated with the time-dependent reduction in plasminogen concentration (r = 0.88, p <0.0005). Thus, clot lysability decreases in conjunction with the development of the lytic state and the associated plasminogen depletion. The lytic state may therefore limit reperfusion during thrombolytic treatment.

INNOVATIVE TEACHING TECHNOLOGIES AT THE TECHNICAL UNIVERSITY

Fitoterapia ◽  
2019 ◽  
Vol 2 (2) ◽  
pp. 57-58
Author(s):  
I. V. Pushchina ◽  
◽  
J. A. Maliarenko ◽  
A. A. Kovalova ◽  
O. V. Kovalova ◽  
...  
Keyword(s):  
Innovative Teaching ◽  
Technical University
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