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Hylobius warreni Wood (Coleoptera: Curculionidae) is a pest of conifers, especially lodgepole pine (Pinus contorta var. latifolia Douglas ex Loudon) (Pinales: Pinaceae) in the Interior of British Columbia. The larvae feed on the roots and root collars and cause girdling damage, resulting in mortality or growth reductions. Previous research has suggested the adult weevils locate potential host trees by using random movements and vision, but likely not chemosensory cues. The purpose of this study is to determine if adult H. warreni respond to particular tree characteristics versus encounter potential hosts at random. Study A was a capture–mark–recapture experiment where weevils were captured on mature pine trees, while Study B was a tracking experiment within a young pine plantation. Weevils showed a preference for larger trees, and for trees that were closer to the weevil’s last known location. In Study A, weevils also avoided climbing trees in poor health, while in Study B, the weevils’ preference for taller trees increased as their distance from the weevil increased, as well as when taller trees were closer to other trees. Movement rates were similar to those observed in previous studies, were positively correlated with the average spacing of trees, and declined with time after release. This confirms previous findings that H. warreni may locate host trees by both vision and random movements, and that their movements are determined primarily by the size and distribution of potential host trees within their habitat.

An increasing demand for both formal and informal care is likely to result from the ongoing demographic transition at the same time as there is a further move away from the traditional domestic division of labour. Public policy-making that aims at increasing the supply of informal care necessitates knowledge about the relative importance of various incentives for individual care providers. This paper takes as a point of departure that the willingness to supply informal care is partly explained by the extent to which it adversely affects labour market outcomes and analyses the effect on labour market outcomes of providing informal care to one’s elderly parent(-s) among the 50+ of Europe. Data from SHARE (Survey of Health, Ageing, and Retirement in Europe) was used to examine the association between, on the one hand, hours of informal care provided and, on the other, (1) the probability of employment, (2) hours worked, and (3) wages, respectively. The results suggest that giving informal care to one’s elderly parents is associated with significant costs in terms of foregone labour market opportunities and that these adverse effects vary between countries. The negative effect on the employment probability and the number of hours worked, respectively, of informal-care provision was found to be stronger in central Europe than in southern Europe, while the wage rate was found to be less negatively affected in the central European countries.

An increasing demand for both formal and informal care is likely to result from the ongoing demographic transition at the same time as there is a further move away from the traditional domestic division of labour. Public policy-making that aims at increasing the supply of informal care necessitates knowledge about the relative importance of various incentives for individual care providers. This paper takes as a point of departure that the willingness to supply informal care is partly explained by the extent to which it adversely affects labour market outcomes and analyses the effect on labour market outcomes of providing informal care to one's elderly parent(-s) among the 50+ of Europe. Data from SHARE (Survey of Health, Ageing, and Retirement in Europe) was used to examine the association between, on the one hand, hours of informal care provided and, on the other, (1) the probability of employment, (2) hours worked, and (3) wages, respectively. The results suggest that giving informal care to one's elderly parents is associated with significant costs in terms of foregone labour market opportunities and that these adverse effects vary between countries. The negative effect on the employment probability and the number of hours worked, respectively, of informal-care provision was found to be stronger in central Europe than in southern Europe, while the wage rate was found to be less negatively affected in the central European countries.

The aims of this study were (1) to analyse whether informal care, provided by children or grandchildren to their elderly parents, and formal care are substitutes or complements, and (2) whether this relationship differs across Europe. The analyses were based on the newly developed SHARE (Survey of Health, Age, and Retirement in Europe) database. We found (1) that informal- and formal home care are substitutes, while informal care is a complement to doctor- and hospital visits, and (2) that these relationships in some cases differ according to a north-south gradient.

Using an 11-year panel of 156 Norwegian and Swedish patients with severe haemophilia, and including retrospective case-book data from birth, we compared the differences in the haemophilia-related resource use between on-demand and prophylactic treatment. Patients treated on-demand had more surgery (arthrodeses, prostheses implantations and synovectomies) and more days lost from work. Median annual factor-concentrate consumption among adults (18+) was 211,000 IU [interquartile range (IQR) 154,000-268,000] or 3,024 IU kg-1 year(-1) for patients on prophylactic treatment and 55,000 IU (IQR 28,000-91,000) for on-demand patients (780 IU kg(-1) year(-1)). This was partly explained by the fact that the median dose per kg body weight was twice as great 28, (IQR 24-32) for prophylaxis compared with 14 (IQR 12-16) for on-demand. Prescribed dose per kg body weight was found to be an important factor explaining the variation in total annual factor-concentrate consumption per patient for both types of treatment. Other variables included in the panel-data regression analysis were the number of weeks on secondary prophylaxis for on-demand patients and age, body weight and type of haemophilia for children (0-17 years) on prophylaxis. Differences were consistently substantial and will affect both costs and benefits of the two treatment strategies.

A method is presented for rapid determination of bromide ion in commodities and blood by paired-ion liquid chromatography with electrochemical detection. The method involves extraction of samples with water and filtration. Blood is passed through a Sep-Pak C18 minicolumn. Recoveries are usually close to 100%, with satisfactory precision. The detection limit is 1 mg/kg. The method needs little labor and uses no noxious solvents or reagents.

In three separate experiments, Douglas-fir beetles, Dendroctonus pseudotsugae Hopkins, preferred traps baited with either (S)-(-)- or racemic (R,S)-(±)-frontalin over those baited with the (R)-(+)-enantiomer. Spruce beetles, D. rufipennis (Kirby), appeared to be attracted equally to both the (S)-(-)- and (R)-(+)-enantiomers, but low catches and high variance made interpretation of the data tenuous. For both species racemic frontalin was as attractive as the preferred enantiomer alone. The bark beetle predator,Thanasimus undatulus (Say), was attracted preferentially to (S)-(-)-frontalin over (R)-(+)- or (R,S)-(±)-frontalin in a Douglas-fir stand, while both enantiomers were equally attractive in a spruce stand.