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Increment core samples at b.h. were taken from 15 trees in each of 7 stands (aged 22-68 yr) in North Zealand, Denmark, in Oct.-Nov. 1984. Radial incre...
Read moreA simulation model is described which demonstrates the role of parasitic Hymenoptera in influencing the numbers of the aphid Sitobion avenae on cereal...
Read moreThe cereal aphid outbreaks of 1979 (Metopolophium dirhodum) and 1980 (Sitobion avenae) and their lower populations in 1981, in Norfolk, eastern Englan...
Read moreAs the key carbon (C) fluxes between biosphere and atmosphere, soil respiration (Rs) and ecosystem respiration (Re) play vital roles in regulating glo...
Read moreHealthy soils are crucial for sustainable food production, but tillage limits the biological regulation of essential ecosystem services. Better unders...
Read moreThe flight phenologies of Sitobion avenae and Metopolophium dirhodum, as indicated by suction trap catches at 18 sites throughout the UK between 1975 ...
Read moreNon-native insects pose threats to forest health and often spread via stratified dispersal in which long-distance jumps cause elevated rates of range ...
Read morePine (genus Pinus) species are planted extensively for forestry purposes in areas where they are non-native, with the result that biological invasions...
Read moreA method is discussed for determining distribution and abundance of the spindle tree (Euonymus europaeus). This could be used for other hedgerow speci...
Read moreRed-billed queleas Quelea quelea are major pests of small-grain crops throughout sub-Saharan Africa. When conditions permit, birds breed in vast colon...
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