Mass Rearing of the Cabbage Maggot Under Controlled Environmental Conditions, with Observations on the Biology of Cyclodiene-Susceptible and Resistant Strains1

1966 ◽  
Vol 59 (3) ◽  
pp. 569-573 ◽  
Author(s):  
C. R. Harris ◽  
H. J. Sveg
Keyword(s):  
Environmental Conditions ◽  
Mass Rearing ◽  
Cabbage Maggot

Establishing and Maintaining a Culture of Hylemya brassicae (Bouché) Diptera: Anthomyiidae) in the Greenhouse or Laboratory

1962 ◽  
Vol 94 (5) ◽  
pp. 458-460 ◽  
Author(s):  
D. C. Read ◽  
H. E. Welch
Keyword(s):  
Mass Rearing ◽  
In Captivity ◽  
Hylemya Brassicae ◽  
Cabbage Maggot ◽  
Successive Generations

Since a technique for mass rearing of the cabbage maggot Hylemya brassicae (Bouché), was described (Read, 1960), inquiries from different countries indicate that many workers encounter difficulties in rearing this insect in captivity. This paper discusses these difficulties and describes methods successfully used by the authors for establishing and maintaining cultures in the greenhouse. Using these methods, 22 successive generations of H. brassicae have been reared at Belleville in less than four years.

MASS REARING OF THE CARROT WEEVIL, LISTRONOTUS OREGONENSIS (COLEOPTERA: CURCULIONIDAE), UNDER CONTROLLED ENVIRONMENTAL CONDITIONS

1975 ◽  
Vol 107 (1) ◽  
pp. 95-98 ◽  
Author(s):  
P. Martel ◽  
H. J. Svec ◽  
C. R. Harris
Keyword(s):  
Relative Humidity ◽  
Larval Development ◽  
Environmental Conditions ◽  
Mass Rearing ◽  
Larval Rearing ◽  
Listronotus Oregonensis ◽  
Carrot Weevil ◽  
Oviposition Sites

AbstractA technique for mass rearing the carrot weevil, Listronotus oregonensis (LeConte), is described. Adults were provided with carrot roots for food and oviposition sites. Larvae developed directly in these roots. Different temperature regimens for larval rearing were tested and best results were obtained using 21 °C for the first 2 weeks of larval development and 27 °C thereafter. Photoperiod was maintained at 16 h and relative humidity at 70%. Under these conditions, 97.6% of adults emerged in 39–42 days.

Mass Rearing of the Cabbage Maggot, Hylemya brassicae (Bouché) (Diptera: Anthomyiidae) in the Greenhouse

1960 ◽  
Vol 92 (8) ◽  
pp. 574-576 ◽  
Author(s):  
D. C. Read
Keyword(s):  
Chemical Control ◽  
Mass Rearing ◽  
Large Numbers ◽  
Hylemya Brassicae ◽  
Cabbage Maggot

Large numbers of each of the stages of the cabbage maggot, Hylemya brassicae (Bouché), are often required for studies on biology or on biological or chemical control of the insect. A method has been reported by Sherwood and Pond (1954) for maintaining a colony for more than a year. The method described herein enables mass rearing of eggs, larvae and pupae and easy separation of any stage.

Vibration Isolator System for Electron Microscope

1990 ◽  
Vol 48 (1) ◽  
pp. 182-183
Author(s):  
K. Ohi ◽  
M. Mizuno ◽  
T. Kasai ◽  
Y. Ohkura ◽  
K. Mizuno ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Magnetic Fields ◽  
Environmental Conditions ◽  
Vibration Isolator ◽  
Air Conditioners ◽  
Vibration Isolators ◽  
Large Size ◽  
Electron Microscopes

In recent years, with electron microscopes coming into wider use, their installation environments do not necessarily give their performance full play. Their environmental conditions include air-conditioners, magnetic fields, and vibrations. We report a jointly developed entirely new vibration isolator which is effective against the vibrations transmitted from the floor.Conventionally, large-sized vibration isolators which need the digging of a pit have been used. These vibration isolators, however, are large present problems of installation and maintenance because of their large-size.Thus, we intended to make a vibration isolator which1) eliminates the need for changing the installation room2) eliminates the need of maintenance and3) are compact in size and easily installable.

The influence of external conditions on sound pressure in the pistonphone at the infrasound frequency range

2020 ◽  
pp. 67-72
Author(s):  
A. V. Konkov ◽  
D. V. Golovin
Keyword(s):  
Environmental Conditions ◽  
Sound Pressure ◽  
Primary Method ◽  
Frequency Range ◽  
External Conditions ◽  
Numerical Estimations

The influence of environmental conditions on a sound pressure reproduced by the primary method in the measuring chambers of the Pistonphone in the frequency range from 1 mHz to 250 Hz is estimated. Numerical estimations of influence of environmental conditions on sound pressure in pistonphone measuring chambers are given and special requirements to system of maintenance of required external conditions are specified.

Disentangling the role of shared ancestry and the environment on leaf stable isotopes

2019 ◽  
Author(s):  
Marko J. Spasojevic ◽  
Sören Weber1
Keyword(s):  
Stable Isotopes ◽  
Environmental Conditions ◽  
Evolutionary History ◽  
Environmental Control ◽  
Phylogenetic Signal ◽  
Individual Species ◽  
Habitat Types ◽  
Δ13c And Δ15n ◽  
Environmental Controls ◽  
Shared Ancestry

Stable carbon (C) and nitrogen (N) isotopes in plants are important indicators of plant water use efficiency and N acquisition strategies. While often regarded as being under environmental control, there is growing evidence that evolutionary history may also shape variation in stable isotope ratios (δ13C and δ15N) among plant species. Here we examined patterns of foliar δ13C and δ15N in alpine tundra for 59 species in 20 plant families. To assess the importance of environmental controls and evolutionary history, we examined if average δ13C and δ15N predictably differed among habitat types, if individual species exhibited intraspecific trait variation (ITV) in δ13C and δ15N, and if there were a significant phylogenetic signal in δ13C and δ15N. We found that variation among habitat types in both δ13C and δ15N mirrored well-known patterns of water and nitrogen limitation. Conversely, we also found that 40% of species exhibited no ITV in δ13C and 35% of species exhibited no ITV in δ15N, suggesting that some species are under stronger evolutionary control. However, we only found a modest signal of phylogenetic conservatism in δ13C and no phylogenetic signal in δ15N suggesting that shared ancestry is a weaker driver of tundra wide variation in stable isotopes. Together, our results suggest that both evolutionary history and local environmental conditions play a role in determining variation in δ13C and δ15N and that considering both factors can help with interpreting isotope patterns in nature and with predicting which species may be able to respond to rapidly changing environmental conditions.

Sign in / Sign up

Export Citation Format

Share Document