A Determination of the lethal Dosage of Arsenic for Missouri and Colorado Codling Moth Larvae

1929 ◽  
Vol 22 (4) ◽  
pp. 655-656
Author(s):  
Leonard Haseman ◽  
Virgil F. Burk
Keyword(s):  
Codling Moth ◽  
Lethal Dosage

Determination of Installation Heights For Codling Moth`s Synthetic Pheromone Traps in Apple Canopy

2002 ◽  
Vol 1 (3) ◽  
pp. 226-227 ◽  
Author(s):  
Muhammad Faheem Mal ◽  
Liaquat Ali . ◽  
Sohail Anwar .
Keyword(s):  
Codling Moth ◽  
Pheromone Traps ◽  
Synthetic Pheromone

scholarly journals ISOLASI DAN IDENTIFIKASI BAKTERI Aeromonas sp. DARI LELE DUMBO (Clarias sp.) DI KABUPATEN NGAWI

2016 ◽  
Vol 18 (2) ◽  
pp. 55
Author(s):  
Sri Rejeki ◽  
Triyanto Triyanto ◽  
Murwantoko Murwantoko
Keyword(s):  
Freshwater Fish ◽  
Aeromonas Hydrophila ◽  
Clinical Signs ◽  
Freshwater Fishes ◽  
Skin Ulcer ◽  
African Catfish ◽  
Bacterial Isolates ◽  
Disease Symptoms ◽  
Lethal Dosage

African catfish (Clarias sp.) is one of important freshwater fish which prefer consumed by people due to many advantages. Aeromonas sp. bacteria are dangerous patogen for freshwater fishes. This objective of the research was to isolate, identify and determine pathogenicity of Aeromonas sp. bacteria from African catfish from District Ngawi. The samples of catfish with 20 - 25 cm length showing clinical signs disease were obtained from three sub districts. Bacteria were isolated from kidney and inoculated into GSP medium. Characterization and identification through morphology of bacterial colonies, cells and biochemical test. Postulate Koch was conducted to verify abaility to couse disease. Pathogenicity was analyzed by determination of value of Lethal Dosage-50 on catfish on 7 - 9 cm length. The result showed that the disease symptoms of fish infected by the bacteria were skin ulcer, abdominal swelling and kidney damage. Fifteen bacterial isolates were collected which five, six and four isolates were from Kecamatan Karang Jati, Geneng dan Paron.sub-district respectively. The result showed 12 isolates (GKJ1, GKJ3, GKJ4, GGN1, GGN2, GGN3, GGN4, GGN5, GGN6, GPR2, GPR3 and GPR4) were identified as Aeromonas hydrophila. Three isolates (GKJ2, GKJ5 and GPR1) were identified as A. salmonicida. Isolate of A. hydrophila GKJ1, GKJ4, GGN2, GGN5, GPR2 and GPR4 were virulent to African catfish with LD50 values of 1,55 x 105, 3,89 x 105, 7,24 x 105, 2,39 x 105, 6,61 x 104 and 1,95 x 104 cfu/fish.

A Quick Method for Sex Determination of Codling Moth Pupae1

1965 ◽  
Vol 58 (3) ◽  
pp. 576-576 ◽  
Author(s):  
David M. Peterson
Keyword(s):  
Sex Determination ◽  
Codling Moth ◽  
Quick Method

The life history of Codling Moth, Cydia pomonella (L) (Lepidoptera: Tortricidae), in the Australian Capital Territory.

1963 ◽  
Vol 11 (3) ◽  
pp. 323 ◽  
Author(s):  
PW Geier
Keyword(s):  
First Generation ◽  
Cydia Pomonella ◽  
Ecological Factors ◽  
Weather Conditions ◽  
Codling Moth ◽  
Australian Capital Territory ◽  
Australian Capital ◽  
History Of ◽  
Life Habits

The life habits of codling moth in the Australian Capital Territory are described, and the ecological characteristics of the species and its environment are defined. In the Capital Territory, codling moth produces a complete first generation, a partial second generation, and some third generation individuals each summer. On an average, females lay between 40 and 50 eggs in all generations, but fecundity varies much between individuals. The observed distribution pattern of eggs and larval injuries to fruit suggest that oviposition occurs predominantly on trees at, or near, sources of females. In uniformly infested, homogeneous orchards, egg and damage distribution are almost random between trees. No significant departure from randomness was detected either between fruits, or between locations within trees. Fruits are often penetrated by more than one larva, either simultaneously or in succession, and competition occurs. Its forms and effects were examined. Fruits penetrated by several larvae tended to produce more mature larvae than fruits penetrated once, but the chances of survival fell as the numbers of entries per fruit increased. Fully fed larvae move from the fruit to an appropriate place on, or very close to, the host tree, where they spin a cocoon and eventually pupate. Under natural conditions in the Capital Territory, most mature larvae perish before establishing a cocoon. The rate of establishment was shown to be directly dependent upon the abundance and accessibility of suitable cocooning sites. The injuriousness of codling moth is always extremely high in the Capital Territory because of the generally favourable weather conditions. Particular effects of climate and weather on codling moth activity are discussed. Optimum environmental conditions for codling moth are defined. Conditions in the Capital Territory were found to be nearly optimum in most respects. Codling moth abundance cannot be explained by single ecological factors. Comprehensive studies of local populations are required to understand the numerical determination of the pest.

Galactic orbits of stars

1966 ◽  
Vol 25 ◽  
pp. 93-97
Author(s):  
Richard Woolley
Keyword(s):  
Globular Cluster ◽  
Potential Field ◽  
High Velocity ◽  
Velocity Vector ◽  
Variable Stars ◽  
The Sun ◽  
Proper Motions ◽  
Rr Lyrae ◽  
The Galaxy

It is now possible to determine proper motions of high-velocity objects in such a way as to obtain with some accuracy the velocity vector relevant to the Sun. If a potential field of the Galaxy is assumed, one can compute an actual orbit. A determination of the velocity of the globular clusterωCentauri has recently been completed at Greenwich, and it is found that the orbit is strongly retrograde in the Galaxy. Similar calculations may be made, though with less certainty, in the case of RR Lyrae variable stars.

Distance to SN 1987A and the LMC

1999 ◽  
Vol 190 ◽  
pp. 549-554
Author(s):  
Nino Panagia
Keyword(s):  
Angular Size ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Light Curves ◽  
Distance Modulus ◽  
Absolute Size ◽  
Sn 1987A

Using the new reductions of the IUE light curves by Sonneborn et al. (1997) and an extensive set of HST images of SN 1987A we have repeated and improved Panagia et al. (1991) analysis to obtain a better determination of the distance to the supernova. In this way we have derived an absolute size of the ringRabs= (6.23 ± 0.08) x 1017cm and an angular sizeR″ = 808 ± 17 mas, which give a distance to the supernovad(SN1987A) = 51.4 ± 1.2 kpc and a distance modulusm–M(SN1987A) = 18.55 ± 0.05. Allowing for a displacement of SN 1987A position relative to the LMC center, the distance to the barycenter of the Large Magellanic Cloud is also estimated to bed(LMC) = 52.0±1.3 kpc, which corresponds to a distance modulus ofm–M(LMC) = 18.58±0.05.

International determination of the total motion of the pole

1961 ◽  
Vol 13 ◽  
pp. 29-41
Author(s):  
Wm. Markowitz
Keyword(s):  
Secular Motion ◽  
The Future

A symposium on the future of the International Latitude Service (I. L. S.) is to be held in Helsinki in July 1960. My report for the symposium consists of two parts. Part I, denoded (Mk I) was published [1] earlier in 1960 under the title “Latitude and Longitude, and the Secular Motion of the Pole”. Part II is the present paper, denoded (Mk II).

Time and Latitude in South Africa

1972 ◽  
Vol 1 ◽  
pp. 27-38
Author(s):  
J. Hers
Keyword(s):  
South Africa ◽  
Cape Town ◽  
Astronomical Observations ◽  
Royal Observatory ◽  
The Republic ◽  
Astronomical Determination ◽  
Limited Accuracy ◽  
Better Than

In South Africa the modern outlook towards time may be said to have started in 1948. Both the two major observatories, The Royal Observatory in Cape Town and the Union Observatory (now known as the Republic Observatory) in Johannesburg had, of course, been involved in the astronomical determination of time almost from their inception, and the Johannesburg Observatory has been responsible for the official time of South Africa since 1908. However the pendulum clocks then in use could not be relied on to provide an accuracy better than about 1/10 second, which was of the same order as that of the astronomical observations. It is doubtful if much use was made of even this limited accuracy outside the two observatories, and although there may – occasionally have been a demand for more accurate time, it was certainly not voiced.

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