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A simulation model is described which demonstrates the role of parasitic Hymenoptera in influencing the numbers of the aphid Sitobion avenae on cereal...

At Rothamsted in southern England from 1973 to 1977, alate cereal aphids (Sitobion avenae (F.), Metopolophium dirhodum (Wlk.), and in some years S. fr...

In epidemiological studies of wildlife parasites, faecal genotyping has been introduced to prevent bias in estimates of parasite prevalence from faeca...

The following is virtually the authors' summary. A small static population of Schistocerca gregaria (Forsk.) confined to an area of Heliotropium aegyp...

Population models of intermediate host species' abundance are vital tools for assessing the impacts of control activities and changing environmental c...

Anthelmintics are widely used to control gastrointestinal parasites of livestock. However, the residues of these compounds, particularly the macrocycl...

A 5-yr survey in NSW revealed considerable annual variation in the abundance, racial diversity and virulence of both pathogen populations. Racial dive...

The following is based largely on the author's summary of .this part of a series on investigations in south-eastern f-.ngland [cf. RAE A 54 470]. Foll...

Realistic measures of the impact of individual or multiple stressors are important for ecological risk assessment. Although multiple anthropogenic str...

Density-dependent mortality was shown to occur among the parasitic stages of Boophilus microplus (Can.) on European and Zebu X European breeds of catt...