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A logistic model is presented which simulates population growth and concomitant environmental changes when Sitophilus oryzae (L.) is reared on wheat. ...

This paper addresses the errors that are associated with the long-term prediction of weed densities, and the effect of these errors on the performance...

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

The relative importance to hares of pasture fields, with and without farm livestock, was assessed on a mixed farm of cereals and grass in Hampshire, S...

The survival of four populations of eggs of Hylemya (Leptohylemyia) coarctata (Fall.) at Rothamsted in southern England was studied. Few eggs disappea...

In further investigations at Rothamsted [cf. preceding abstract], parasitism, overcrowding (two or more larvae in the same shoot), disease and predati...

The pioneer community on sand tailings areas in W. Malaysia contained a number of grasses and legumes, including Tricholaena rosea [= Rhynchelytrum re...

Two cultivars of barley, one resistant and one susceptible to aphids, were grown in pots in mono- or mixed culture in the laboratory, and either infes...

Field and laboratory trials were conducted in southern England to study the effects of seeding density and row spacing of oats on colonisation of seed...

Light-trap records showed that Nilaparvata lugens (Stal), an important pest of rice, is prevalent in the southwestern part of Japan. Populations that ...