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Turkish herbivores and pathogens associated with some knapweeds (Asteraceae: Centaurea and Acroptilon) that are weeds in the United States.
Development of integrated pest management programs in urban forests: the elm beetle (Xanthogaleruca luteola (Müller)) in California, USA
Life history of the incense cedar scale xylococculus macrocarpae homoptera margarodidae on incense cedar in california with a description of the larvae of one of its common predators eronyxa expansus…
Xylococculus macrocarpae (Coleman) had one generation a year on incense cedar at Blodgett Forest, El Dorado County, California, at 1200 to 1550 m elevation; the insect was especially abundant on branches and the upper and middle boles.
Bird foraging on incense-cedar and incense-cedar scale during winter in California
- M. Morrison, D. Dahlsten, S. Tait, R. Heald, Kathleen A. Milne, D. L. Rowney
- Environmental Science
The response of birds to variaIions in Ihe density of incense-cedar (Colocedrw decvrem [Toe] Florin.), and Ulmugh exclosure experiments, theimpact of bird fonging on the density of the scaleinsect…
A Monitoring System and Development of Ecologically Sound Treatments for Elm Leaf Beetle
- D. Dahlsten, S. Tait, D. L. Rowney, Beverly J. Gingg
- BiologyArboriculture & Urban Forestry
- 1 July 1993
Monitoring degree-days allows sampling and treatments to be scheduled for maximum effi- ciency and effectiveness and Environmentally acceptable treat- ments under development include release of the egg parasite Tetrastichus gallerucae, trunk banding with insecticide, and foliar spraying with Bacillus thuringiensis formulations.
Host specificity ofPterolonche inspersa [Lep.: Pterolonchidae] and its potential as a biological control agent forCentaurea diffusa, diffuse knapweed, andC. Maculosa, spotted knapweed
In 1981 the United States Department of Agriculture started investigating the host specificity of P. inspersa as a candidate for biological control ofC.
Occurrence of Insect and Disease Pests on Young-Growth Sitka Spruce and Western Hemlock in Southeastern Alaska
Insects and diseases were surveyed in 16 even-aged, young-growth stands of Sitka spruce and western hemlock and no pests occurred at levels likely to cause damage.
A MONITORING SYSTEM AND DEVELOPMENT OF ECOLOGICALLY SOUND TREATMENTS FOR ELM
Elm leaf beetle (Xanthogaleruca luteola) damage can be predicted in time to determine if treatment is necessary by determining the percentage of 30 cm (1 ft), branch terminals with ELB eggs. Sampling…
Treatment of destructive elm leaf beetle should be timed by temperature
Elm leaf beetle control efforts in northern California can be effectively timed using temperature monitoring, and an insecticide applied as a bark band helps preserve the beetle's natural enemies.