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Sparrowhawks (Accipiter nisus) found dead in eastern England showed a significant reduction in HEOD (organochlorine pesticide residues derived from al...
Read moreAraneae were collected using pitfall traps and absolute density sampling over a period of 6 months in a field of winter wheat in the UK. The numerical...
Read moreA statistical study of breeding success, eggshell index, and DDE, HEOD and PCB levels in Accipiter nisus eggs collected from 17 areas in Britain durin...
Read moreIn field trials in the UK, different levels of attack by hymenopterous parasitoids occurred in stem-boring larval Diptera (including Oscinella frit) i...
Read moreAn analysis of predation of cereal aphids (Sitobion avenae and Metopolophium dirhodum) by larvae of Episyrphus balteatus is described. Field data on t...
Read moreRising demands for agricultural products and high environmental costs of intensive agriculture reinforce the need for ecological replacements in agric...
Read moreExperiments 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...
Read moreThe following is based largely on the author's sumrnary. Scotch broom (Sara-thamnus scoparius) was introduced from Europe to the Pacific toast of Nort...
Read moreA simulation model for the population dynamics of rice leaf-folders (Pyralidae) interacting with rice is described. It was designed to improve the und...
Read moreInvasive alien plants have serious economic and ecological impacts, for example, by displacing native plants and invertebrates, and their management i...
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