Habitats of Limnaea truncatula in England and Wales during Dry Seasons

1938 ◽  
Vol 16 (4) ◽  
pp. 213-260 ◽  
Author(s):  
B. G. Peters

1. The complacent attitude that fluke is no longer a disease of importance is attacked on the grounds that the recent low incidence of the disease is largely due to a temporary scarcity of the intermediary, Limnaea truncatnla.2. A description is given of methods of making contacts, taking samples, and recording observations in a survey of typical habitats of L. truncatula in England and Wales.3. Twenty-two such habitats are described in some detail.4. These form the basis of a brief discussion on factors contributing to the ideal habitat, knowledge of which is desirable for the elaboration of new methods of control.5. A provisional map showing the distribution of liver fluke in England and Wales is appended.

BMJ Open ◽  
2016 ◽  
Vol 6 (5) ◽  
pp. e010608 ◽  
Author(s):  
Nicholas Fulton ◽  
Laura F Anderson ◽  
John M Watson ◽  
Ibrahim Abubakar

2015 ◽  
Vol 170 ◽  
pp. 190-195 ◽  
Author(s):  
D. Gunnell ◽  
C. Coope ◽  
V. Fearn ◽  
C. Wells ◽  
S.-S. Chang ◽  
...  

2014 ◽  
Vol 9 (1) ◽  
pp. 23-52 ◽  
Author(s):  
S. Czaplińska

The specific and quantitative composition of the microflora was investigated within the range of the roots of 1-, 2- and 3-year plants in alfalfa cultures with the aim of finding effective new methods of control or prevention of diseases of alfalfa caused by <i>Verticillium albo-atrum</i> and <i>Ascochyta imperfect</i>. The biotic realations between the most numerous saprophytes found on the same sites and the above named pathogens were also studied.


1969 ◽  
Vol 55 (2) ◽  
pp. 139-146
Author(s):  
Lii-Jang Liu ◽  
José Adsuar ◽  
Enrique Pérez

A sugarcane disease survey was conducted over different mill zones of Puerto Rico during the fall of 1969 and the spring of 1970. It covered the plantations of 10 sugar mills. The results obtained to date indicate that the diseases of major importance are ratoon stunting, chlorotic streak, pineapple disease, and root rot caused by a complex of Pythium, Fusarium and nematodes. The specific disease problems are identified in each area. Special attention was given to disease distribution, economic importance, and possible methods of control. Although in general low incidence of ratoon stunting was observed in commercial plantings, data obtained from previous variety tests indicate this malady to be potentially dangerous. Hot water treatment of seedpieces should be conducted to prevent its further spread. The significance of chlorotic streak disease as a factor in yield decline in Puerto Rico has not yet been completely evaluated. The high incidence of this disease, under present conditions, has given rise to concern. Pineapple disease caused by Thielaviopsis paradoxa greatly affects the germination of P.R. 980, especially in areas with poor drainage. Root rots caused by Pythium, Fusarium and nematodes reduced germination of P.O.J. 2878 and H. 328560 by as much as 40 percent in poorly-drained areas.


2020 ◽  
Vol 57 (11) ◽  
pp. 1336-1339
Author(s):  
Yufan Yan ◽  
Jonathan T. Bacos ◽  
Arthur J. DiPatri ◽  
Arun K. Gosain

Shunt-induced craniosynostosis is a rare complication of ventricular shunting for hydrocephalus in pediatric patients. Although the exact pathophysiology of this form of secondary craniosynostosis is not well understood, the current understanding is that persistent drainage of the ventricular shunt causes decreased dural tension, resulting in decreased expansile force on the cranium and premature sutural fusion. Due to the low incidence of this complication, there is no consensus on the ideal treatment for shunt-induced craniosynostosis. In recent years, distraction osteogenesis has been employed with greater frequency, as it is felt to counter the fundamental problem of decreased expansile force on the cranium. However, in a patient with a ventricular shunt, placement of external hardware in close proximity to the shunt could cause significant morbidity due to the increased risk of shunt infection. We present the management of a patient with shunt-induced craniosynostosis who continued to be shunt-dependent. We chose to use fully buried springs to create an expansile force on the cranium as an alternative to external distractors so as to mitigate the risk of infection. We demonstrate that spring-assisted distraction osteogenesis can be an effective treatment modality for patients with shunt-induced craniosynostosis. This method should be considered in patients with contraindications to external distraction devices, such as ongoing shunt dependency.


1964 ◽  
Vol 96 (1-2) ◽  
pp. 114-114
Author(s):  
P. Belton ◽  
M. G. Maw

For several years we have been investigating the effects of natural and artificial acoustical and electrical phenomena on the behaviour of insects with a view to the development of new methods of control.A. Sounds can be exploited in two ways:–firstly to affect insects whose behaviour is stimulated by naturally-occurring sounds; secondly to use the very rapid pressure changes associated with sounds as a sort of “death ray.”


2018 ◽  
Vol 13 (3) ◽  
pp. 309-328 ◽  
Author(s):  
Marisa Silvestri

This article drives forward a more critical insight into the position of women within policing. In focusing on women as police leaders, it problematizes taken for granted representations of gender and proposes an alternative reading of their experiences. Drawing on theoretical work on gendered organizations, the article argues that greater attention needs to be paid to the cultural and structural conditions that enable the “heroic male” to emerge as the “ideal” police leader. It also considers the recent introduction of Direct Entry for senior officers in England and Wales as a disruptive tool to the gendered order within policing.


Author(s):  
Brandon J. Newendorp ◽  
Christian Noon ◽  
Joe Holub ◽  
Eliot H. Winer ◽  
Stephen Gilbert ◽  
...  

In order to adapt to an ever-changing set of threats, military forces need to find new methods of training. The prevalence of commercial game engines combined with virtual reality (VR) and mixed reality environments can prove beneficial to training. Live, virtual and constructive (LVC) training combines live people, virtual environments and simulated actors to create a better training environment. However, integrating virtual reality displays, software simulations and artificial weapons into a mixed reality environment poses numerous challenges. A mixed reality environment known as The Veldt was constructed to research these challenges. The Veldt consists of numerous independent displays, along with movable walls, doors and windows. This allows The Veldt to simulate numerous training scenarios. Several challenges were encountered in creating this system. Displays were precisely located using the tracking system, then configured using VR Juggler. The ideal viewpoint for each display was configured based on the expect location for users to be looking at it. Finally, the displays were accurately aligned to the virtual terrain model. This paper describes how the displays were configured in The Veldt, as well as how it was used for two training scenarios.


2003 ◽  
Author(s):  
A. I. Fedoseev ◽  
A. V. Fedjanovich ◽  
E. P. Ishenko ◽  
A. V. Mushenkov ◽  
A. I. Odintsov ◽  
...  

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