Parasitism of Telenomus Costalimai (Hymenoptera: Scelionidae) on Rhodnius Prolixus (Hemiptera: Reduviidae) under Laboratory Conditions: Effects of Density

1985 ◽  
Vol 22 (6) ◽  
pp. 654-657 ◽  
Author(s):  
Dora Feliciangeli ◽  
Jorge E. Rabinovich
Keyword(s):  
Rhodnius Prolixus ◽  
Laboratory Conditions ◽  
Effects Of Density

scholarly journals Lethal effect of a bait for Rhodnius prolixus (Hemiptera: Reduviidae), the vector of Chagas' disease, containing hexachlorocyclohexane (HCH), under laboratory conditions

1992 ◽  
Vol 34 (4) ◽  
pp. 295-301 ◽  
Author(s):  
Marli Maria Lima ◽  
Luis Rey ◽  
Rubens Pinto de Mello
Keyword(s):  
Mortality Rate ◽  
Chagas Disease ◽  
Room Temperature ◽  
Lethal Effect ◽  
Rhodnius Prolixus ◽  
Active Principle ◽  
Laboratory Conditions

The lethal effect of a bait containing an aqueous hexachlorocyclohexane (HCH) suspension at the concentration of 1g/l and maintained at room temperature was studied in the laboratory over a period of 12 weeks. The suspension was placed in a latex bag hanging inside a 1000-ml beaker tightly covered with nylon netting, and left there with no changes for 85 days. Sixteen groups of R. prolixas bugs, consisting on average of 30 specimens each, were successively exposed to the bait and observed at different intervals for one week each. The mortality rate was 100% for all groups, except for the 16th, whose mortality rate was 96.7%. As the groups succeeded one another, mortality started to occur more rapidly and was more marked at the 6- and 24-h intervals. Later tests respectively started at 6:00 a.m. and 6:00 p.m. showed that diurnal and nocturnal periodicity in the offer of food had no effect on mortality. First- and 2nd- instar nymphs and adults male were more sensitive and 5th- instar nymphs were more resistant to the active principle of the bait.

Wing-beat pattern in Rhodnius prolixus Stål (Heteroptera: Reduviidae) during exhaustive flight

1979 ◽  
Vol 57 (2) ◽  
pp. 391-395 ◽  
Author(s):  
J. L. Gringorten ◽  
W. G. Friend
Keyword(s):  
Beat Frequency ◽  
Rhodnius Prolixus ◽  
Wing Beat ◽  
Wing Beat Frequency ◽  
Laboratory Conditions ◽  
Flying Insects ◽  
Beat Pattern ◽  
Consistent Change ◽  
In The Wild ◽  
Anatomical Adaptations

Stationary, tethered Rhodnius prolixus males were stimulated to beat their wings for periods averaging 2–3 h. Wing-beat frequency averaged 70 Hz and was quite variable. Wing-beat amplitude declined as the insects approached exhaustion, but no consistent change was observed in beat frequency. Male R. prolixus assumes a characteristic flight posture and exhibits the typical reflexes and anatomical adaptations observed in other flying insects. The long periods of wing beating under laboratory conditions suggest they may be capable of flights of considerable duration in the wild.

Learning and orientation to odor in the bug Rhodnius prolixus Stal 1859 under laboratory conditions

2008 ◽  
Vol 103 (3) ◽  
pp. 587-594 ◽  
Author(s):  
E. Aldana ◽  
C. I. Abramson ◽  
E. Lizano ◽  
R. Vegas ◽  
E. Sulbaran-Romero
Keyword(s):  
Rhodnius Prolixus ◽  
Laboratory Conditions

The Dermal Glands of Rhodnius Prolixus

1969 ◽  
Vol 27 ◽  
pp. 258-259
Author(s):  
J. E. Lai-Fook
Keyword(s):  
Fine Structure ◽  
Secretory Activity ◽  
Rhodnius Prolixus ◽  
Outermost Layer ◽  
Cement Layer ◽  
Dermal Glands

Dermal glands are epidermal derivatives which are reported to secrete either the cement layer, which is the outermost layer of the epicuticle or some component of the moulting fluid which digests the endocuticle. The secretions do not show well-defined staining reactions and therefore they have not been positively identified. This has contributed to another difficulty, namely, that of determining the time of secretory activity. This description of the fine structure of the developing glands in Rhodnius was undertaken to determine the time of activity, with a view to investigating their function.

Human drug taking under controlled laboratory conditions.

1988 ◽  
Author(s):  
Marian W. Fischman ◽  
Richard W. Foltin ◽  
Joseph V. Brady
Keyword(s):  
Laboratory Conditions

Multiple recycling of paperboard: Paperboard characteristics and maximum number of recycling cycles— Part I: Multiple recycling of corrugated base paper

TAPPI Journal ◽  
2019 ◽  
Vol 18 (11) ◽  
pp. 631-638
Author(s):  
FREDERIC KREPLIN ◽  
HANS-JOACHIM PUTZ ◽  
SAMUEL SCHABEL
Keyword(s):  
Compression Test ◽  
Production Capacity ◽  
Strength Properties ◽  
Paper Properties ◽  
Corrugated Board ◽  
Laboratory Conditions ◽  
Base Paper ◽  
Study Results ◽  
Short Span ◽  
Multiple Recycling

Paper for recycling is an important fiber source for the production of corrugated base paper. The change in production capacity toward more and more packaging papers affects the composition of paper for recycling and influences the paper quality. This research project investigated the influence of the multiple recycling of five different corrugated base papers (kraftliner, neutral sulfite semichemical [NSSC] fluting, corrugating medium, testliner 2, and testliner 3) on suspension and strength properties under laboratory conditions. The corrugated board base papers were repulped in a low consistency pulper and processed into Rapid-Köthen laboratory sheets. The sheets were then recycled up to 15 times in the same process. In each cycle, the suspension and the paper properties were recorded. In particular, the focus was on corrugated board-specific parameters, such as short-span compression test, ring crush test, corrugating medium test, and burst. The study results indicate how multiple recycling under laboratory conditions affects fiber and paper properties.

Sign in / Sign up

Export Citation Format

Share Document