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Showing 1 to 16 of 16 for “"LT50"”.
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Hexaflumuron Efficiency and Impact on Subterranean Termite (Reticulitermes spp.) (Isoptera: Rhinotermitidae) Gut Protozoa
… termites fed only hexaflumuron or control diet. LT50s for termites fed control diet, hexaflumuron diet, or both diets in the choice test, were 24.4d, 18.7d, and 20.6d, respectively. The choice test LT50 did not differ from the LT50 of either no-choice test. Termites fed only hexaflumuron diet had …
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Studies related to the artificial spawning and culture of the Abalone, Haliotis midae linne, 1785
… copper and ammonia was investigated. The LT50 to a chlorine concentration of 0.06 mg/l was 170 minutes. For copper the LT50 of larvae exposed to 0.12 mg/l was 53 minutes. The LT50 of ammonia at 5 mg/l was 600 minutes. A brief synopsis of the major findings is presented in the last chapter. …
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Environmental-Stress Tolerant Formulations of Metarhizium anisopliae var. acridum for Control of African Desert Locust (Schistocerca gregaria)
… by submerged conidia and aerial conidia, with LT50 values (95% C.I.) at 1 x 106 spores/insect of 7.8 d (6.7 to 9.0 d), 10.5 d (9.5 to 11.6 d), 14.6 d (11.9 to 18.0 d), respectively. Comparisons were made among cell-wall characteristics of these spore-types, including cell-wall thickness, …
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Control Method for Invasive Aquatic Species introduced via Ballast Water: Effects of Carbon Dioxide Supersaturation on Survivorship of Digesia tigrina (Planaria: Maculata) and Lirceus brachyurus (Isopoda: Crustacea) and Effect of High Hydrostatic Pressure Processing on Freely Suspended and Shellfish Associated T7 Bacteriophage
… the time necessary to produce mortality in 50% (LT50) of any given sample of specimens tested at a certain pressure level. At 38.6 kPa, 103.4 kPa and 172.4 kPa, the LT50 for planaria was calculated to be 150.3 ± 10.1, 58.6 ± 11.1, and 27.8 ± 6.2 minutes, respectively. At 38.6 kPa, 103.4 kPa and …
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Patogenisitas isolat lokal jamur Metarhizium anisopliae (Metsch) terhadap Helicoverpa armigera hubner
… analisis probit untuk mengetahui nilai LC50 dan LT50. Hasil penelitian menunjukkan bahwa mortalitas larva H. armigera dipengaruhi oleh konsentrasi yang digunakan yaitu kontrol, 105, 106, 107 dan 108 konidia/ml. Konsentrasi yang menyebabkan mortalitas tertinggi adalah 107 konidia/ml, yaitu …
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The evolution of freeze tolerance in a historically tropical snail
… I tested the mean lower lethal temperature (LT50) of three temperate and three tropical species. Cryptic species of M. bidentatus are significantly more freeze tolerant than their tropical relatives, although there was variation among locales within species, most likely due to microhabitat …
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Phototoxic target lipid model for predicting the toxicity of polycyclic aromatic hydrocarbons and petroleum to aquatic life
… duration of exposure or median lethal time (LT50) at a fixed concentration. The model accounts for differences in the physical and chemical properties of PAHs and test species sensitivities, as well as variations in light characteristics, such as length of exposure, and the light source …
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Overwintering biology of the brown marmorated stink bug, Halyomorpha halys (Hemiptera: Pentatomidae)
… depress their supercooling point to -15.4 °C and LT50 to -17.5 °C after acute (1 h) exposure, however they do not encounter these temperatures while overwintering indoors. Moreover, overwintering H. halys maintain their water balance through a reduction of water loss rates, while conserving energy …
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Molecular and biological characterization of novel isolates of Plutella xylostella granulovirus found in Kenya
… shorter median lethal time to death (LT50) than the other nine isolates in other geographical populations of P. xylostella. No synergism was observed between the isolates in mixed inoculations of P. xylostella and a slower killing isolate predominated over a faster killing isolate in …
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Utilisation of Proximal Sensing Technology to Map Variability in Ontario Vineyards
… and in winter [vine size, winter hardiness (LT50)]. GreenSeeker™ observations were likewise collected from lag phase to just prior to harvest, through the calculation of Normalized Difference Vegetation Index (NDVI). Thereafter, relationships between vine water status, yield components and …
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Quantitative expression analysis of four low-temperature-tolerance-associated genes during cold acclimation in wheat (Triticum aestivum L.)
… PCR and to establish any association with LT50 (temperature at which 50% of plants are killed). Winter Norstar (vrn-A1/vrn-A1), spring Manitou (Vrn-A1/Vrn-A1) and two near-isogenic lines (Spring Norstar (Vrn-A1/vrn-A1) and Winter Manitou (vrn-A1/vrn-A1), respectively) were used in these …
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COMPARATIVE TOXICOLOGY OF LIPOSCELIS ENTOMOPHILA AND L. BOSTRYCHOPHILA IN RELATION TO THEIR MANAGEMENT
… in both species. However, no decrease in either LT50 or LT95 values was observed with an increase in CO 2 concentration from 45% to 60%. Examination of liposcelid responses to fixed exposure periods showed that above 45% CO,, no corresponding increases in mortality were observed in either species …
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Host influence on the cold hardiness of the emerald ash borer, *Agrilus planipennis* Fairmaire (Coleoptera: Buprestidae)
… lethal temperatures for 50% of the population (LT50) were estimated after accounting for the proportion of larvae that would survive freezing. LT50s of larvae from green ash were 35.2°C (95% CI 35.9°C, 34.7°C) in the winter of 2012-13 and 33.4°C ( 34.1°C, 32.1°C) in the winter of 2013-14. Larvae …
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Signalwege und Toleranzfaktoren für die Anpassung an Hypoxie und Überflutung in Arabidopsis thaliana
… im Gegensatz zu den anderen Genotypen höhere Lt50 Werte bei Überflutung in Dunkelheit als bei Dunkelheit an der Luft. Diese Beobachtung konnte mit einem etwa vierfach höheren Kohlenhydratgehalt, einschließlich Stärke, Saccharose, Glukose und Fruktose, in Rosettenblättern von ged1 nach 24 h …
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Distribution and dispersal of the non-native caprellid amphipod, Caprella mutica Schurin 1935
… ii with 100 % mortality at 30 °C (48 h LT50, 28.3 ± 0.41 °C), and salinities lower than 15 (48 h LC50, 18.7 ± 0.24). Although lethargic at low temperatures (2 °C), no mortality was observed and it is known to survive at temperatures as low as -1.8 °C. It is unlikely that salinity will …
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Preventing Loss of Winter Hardiness in Turfgrass on Golf Greens and Fairways in the Late Winter
Plant growth regulators (PGRs) such as gibberellic acid (GA3), abscisic acid (ABA) and trinexapac-ethyl (TE) can be applied to turfgrasses to promote winter hardiness. Lethal temperature of 50% mortality measurements revealed that application of these PGRs had no effect on the acclimation status of …