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- Drinkwater, L. E.; Letourneau, D. K.; Workneh, F.; van Bruggen, A. H. C.; Shennan, C.
- Ecological applications 1995 v.5 no.4 pp. 1098-1112
- agroecosystems; arthropods; biological control; biomass; commercial farms; disease severity; environmental factors; fertilizers; fruit yield; insect pests; management systems; microbial activity; mineralization; nitrogen; organic foods; organic soils; parasitoids; pest control; pesticides; production technology; root diseases; soil amendments; tomatoes; California
- ... In an integrated, multidisciplinary study we compared ecological characteristics and productivity of commercial farms categorized as either organic (ORG) or conventional (CNV) based on their use of synthetic fertilizers and pesticides or reliance on organic soil amendments and biological pest control. We measured belowground parameters: various soil chemical and biological properties and root dise ...
- Sheldon, Sallie P.; Creed, Robert P., Jr
- Ecological applications 1995 v.5 no.4 pp. 1122-1132
- Euhrychiopsis lecontei; Myriophyllum spicatum; aquatic weeds; biological control; biological control agents; biomass; branches; canopy; indigenous species; insects; lakes; leaves; quarantine; surface water; Canada; United States
- ... We have evaluated the potential of a North American aquatic weevil, Euhrychiopsis lecontei, to serve as an agent of biological control for an exotic weed, Eurasian watermilfoil (Myriophyllum spicatum), which is currently found throughout much of the United States and in some southern provinces of Canada. We have found this weevil on M. spicatum in lakes where populations of the exotic weed have de ...