40 research outputs found
Cellular immune response to hepatitis-C-virus in subjects without viremia or seroconversion: is it important?
Is sudden infant death syndrome still more common in very low birthweight infants in the 1990s?
Assessment of cardiac autonomic control by heart period variability in patients with early-onset familial obesity
Goals for Human Milk Feeding in Mothers of Very Low Birth Weight Infants: How Do Goals Change and Are They Achieved During the NICU Hospitalization?
Developmental potentiality of embryos cultured under low oxygen tension with superoxide dismutase
Ecology of diamondback moth in Australian canola: landscape perspectives and the implications for management
The ecology of diamondback moth (DBM), Plutella xylsotella L. (Lepidoptera: Plutellidae), and records of its frequent, but sporadic, population outbreaks in the canola agroecosystems of southern and western Australia are reviewed. The migratory capacity of DBM, possible maintenance of pest populations on brassicaceous weeds and forage crops, resistance to commonly used pyrethroid insecticides, a lack of effective natural enemies (due to disruption by insecticides and difficulties associated with colonising the vast areas of canola crops) and suitable climatic conditions during critical phases of the crop cycle are all likely to contribute to the observed pest outbreaks. A greater understanding of the ecology of DBM in the canola landscape is fundamental to improving its management in the crop but relevant long-term DBM abundance data are currently lacking. Five critical research issues are identified: (i) improved understanding of the factors which determine regional movement patterns of diamondback in canola-growing areas; (ii) the development and implementation of flexible insecticide resistance management strategies; (iii) better understanding of canola crop colonisation by natural enemies of DBM and their population dynamics under current and alternative insecticide application strategies; (iv) greater appreciation of the interactions betweenDBMand its crop and weedy host plants; and (v) the development of validated simulation models to aid in the forecasting of possibleDBMoutbreaks. Each issue represents a significant challenge but all must be addressed if the development of a sustainable integrated strategy for the management of DBM in Australian canola is to become a reality.Michael J. Furlong, Helen Spafford, Peter M. Ridland, Nancy M. Endersby, Owain R. Edwards, Greg J. Baker, Michael A. Keller and Cate A. Paul