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Flight phenologies of the migrant aphid Rhopalosiphum padi, as indicated by suction trap catches throughout France in 1978-88, were compared using mul...

It is generally thought that the intensification of farming will result in higher disease prevalences, although there is little specific modelling tes...

The population dynamics of the annual weed Emex australis are described for 3 sites in south-eastern Australia. A graphical test showed a random spati...

Observations were made in southern England in 1970-71 on aphid populations infesting the aerial shoots of spring cereals. Aphids mainly Acyrthosiphon ...

The viable weed seed content of the surface soil at 78 sites in the upper Belize Valley, British Honduras, averaged 6488 seeds/m2 and included 54 spec...

The life cycle of A. sylvestris (which dominates disturbed grasslands on road verges and river dikes) was analysed to examine possible causes of its d...

Human population pressure is placing huge demands on China's environment. In recent years, the Chinese government has established a suite of programme...

Recent reports on bee health suggest that sublethal doses of pesticides have negative effects on wild bee reproduction and ultimately on their populat...

The effects of two levels of the insecticides carbaryl (0.11 and 1.13 g/m2) and DDT (0.56 and 5.60 g/m2) on the litter fauna of a closed canopy stand ...

Many studies have reported honeybee colony losses in human-dominated landscapes. While bee floral food resources have been drastically reduced over pa...