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Background Awareness of sarcopenia and frailty is growing and both are known to be potentially reversible with effective resistance training. We aimed to establish whether existing exercise programmes offered to people with sarcopenia or frailty adhere to the known evidence base. Methods We conducted a national on-line survey of practitioners delivering exercise programmes to older people with sarcopenia or frailty. The link to the online survey was distributed through the British Geriatrics Society, Chartered Society of Physiotherapy Special Interest Group for Older People (AGILE), the NHS England Future Collaboration Platform “Supporting People Living with Frailty” forum and social media. Questions covered target population and aims of the exercise programme, type, duration and frequency of exercise, progress assessment and outcome measures. Descriptive analyses were conducted using SPSS v24. Results 136 responses were received from respondents who worked for NHS Trusts, clinical commissioning groups, private practices, and third sector providers. 94% of respondents reported prescribing or delivering exercise programmes to people with sarcopenia or frailty. Most programmes (81/135 [60%]) were primarily designed to prevent or reduce falls. Resistance training was reported as the main focus of the programme in only 11/123 (9%); balance training was the main focus in 61/123 (50%) and functional exercise in 28/123 (23%). Exercise was offered once a week or less by 81/124 (65%) of respondents; the median number of sessions offered was 8.5 (IQR 6 to 12). Outcome measures suitable for assessing the effect of resistance training programmes were reported by fewer than half of respondents (hand grip: 13/119 [11%]; chair stands: 55/119 [46%], short physical performance battery: 4/119 [3%]). Conclusions Current exercise programmes offered to older people with sarcopenia or frailty lack the frequency, duration or specificity of exercise likely to improve outcomes for this group of patients.

The safety of weed biological control depends upon the selection and utilization of the target weed by the agent while causing minimal harm to non-target species. Selection of weed species by biological control agents is determined by the presence of behavioral cues, generally host secondary plant compounds that elicit oviposition and feeding responses. Non-target species that possess the same behavioral cues as found in the target weed may be at risk of damage by classical biological control agents. Here we conducted host range tests and examined secondary plant compounds of several test plant species. We studied the specialist herbivore Nystalea ebalea (Lepidoptera: Notodontidae) a Neotropical species, present in Florida as a surrogate biological control agent of the weed, Brazilian peppertree Schinus terebinthifolia, invasive in Florida and Hawaii. We found that the larvae had the greatest survival when fed the target weed, the Neotropical species Spondias purpurea, the Florida native species Rhus copallinum, and the ornamental Pistacia chinensis. Reduced survival and general larval performance were found on the native species Metopium toxiferum and Toxicodendron radicans. Both the volatiles and the allergen urushiols were chemically characterized for all species but urushiol diversity and concentration best predicted host range of this herbivore species. These results provide insight into host selection and utilization by one oligophagous Schinus herbivore. Other potential biological control agents may also be sensitive to plants that contain urushiols and if so, they may pose minimal risk to these native species.

The host range of Eucosmophora schinusivora Davis and Wheeler (Lepidoptera: Gracillariidae) was studied to assess its suitability as a biological control agent of Schinus terebinthifolius Raddi (Anacardiaceae), a serious environmental and agricultural weed in the USA and elsewhere in the world. The life history of this insect species and its host range were determined in the laboratory with adult no-choice oviposition and larval development tests. This species has five instars, the first three are sap-feeding miners and the last two are tissue feeding. Total development time was 31.7 days. To examine specificity of this species, 10 plant species in Anacardiaceae were selected based on taxonomic relatedness to S. terebinthifolius, economic importance, and availability. In the laboratory, except for Anacardium occidentale and Cotinus obovatus, all of the tested species were accepted for oviposition with a marked preference for the weed S. terebinthifolius, Schinus molle, Rhus copallinum, Rhus sandw...

Adults of the weevil Plectrophoroides lutra were evaluated for biological control of Schinus terebinthifolius. No-choice tests conducted on North American and other valued plants indicated the adults fed on all species offered. Thus, it is unlikely that P. lutra will be developed as a biological control for S. terebinthifolius.