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The effects of natural enemies and rainfall on the population dynamics of the pseudococcid Phenacoccus manihoti, and the effects of P. manihoti on the...

Environmental change and land use may alter the vegetation typical of wetland habitats. However, commonly used techniques for vegetation monitoring th...

1. In vertebrate population estimation, converting faecal density into animal density requires information on the faecal production rate, decay rate a...

The following is virtually the authors' summary of this account of laboratory investigations in Britain. Samples of wheat weighing 10 g and containing...

Both the number of rice hills (clumps of tillering stalks from planted seedlings) and the density of vectors were divided into 3 categories: healthy, ...

Post-industrial shrinking cities contain abundant vacant land and are increasingly recognized for their pollinator conservation potential. At the same...

Increment cores were obtained at b.h. from the stems of 300 trees on the margin of the Lake Vyrnwy reservoir, Montgomeryshire, Wales, in 1969, and the...

Sexual reproduction in 9 clones of Eichhornia crassipes from different parts of the world was examined in the glasshouse. Eight of the clones flowered...

Resistance against pesticides is a widespread and increasing problem. The control of pesticide dose and the mixing of pesticides have been proposed as...

On flat bog with deep peat where heather (Calluna vulgaris), the principal food of the birds, was scarce application of superphosphate, or ground mine...