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A citrus orchard at Nelspruit, South Africa, was pruned back to the main branches to stimulate the growth of new shoots, which are highly attractive t...

Freshwaters are among the most endangered ecosystems in the world as a result of anthropogenic interference such as pollution. Pollution in the form o...

The heather beetle Lochmaea suturalis is a naturally occurring species in the heather dominated landscapes of the United Kingdom. When the heather bee...

Concentrations of DDT and its metabolites were compared over space, time, feeding strategy and diet in the striped kingfisher (Halcyon chelicuti), red...

There is growing awareness that biological control carries risks as well as benefits, but there are few data on below-ground effects of inundative ins...

During the winter of 1976-77, few pupae of Delia brassicae (Wied.) were removed by predators from either natural or introduced populations of pupae bu...

Pesticides constitute a major threat to biodiversity, but our understanding of the complex interactions between local and landscape factors influencin...

New invading pathogen strains must compete with endemic pathogen strains to emerge and spread. As disease control measures are often non-specific, tha...

Seed yields of cowpea (Vigna unguiculata) were assessed in each of two annual growing seasons over the 4-year period 1973 to 1976 in experimental plot...

Experiments were done in England in fields of winter wheat at North Farm, West Sussex, and at Rothamsted in 1978 to investigate the effect of predatio...