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WILLOW

NOMENCLATURE

Other Names: too many to list

 Scientific Name: Salix spp.

 Plant Family: Salicaceae

GENERAL INFORMATION

Botanical Description: This family of woody, deciduous trees and shrubs is often distinguished by its characteristic long narrow leaves and fast growth rate.

 Stems: can grow to large bush or tree size

 Leaves: alternate, 1 - 6 inches long, narrow, slightly notched, may be lance shaped

 Roots: deep, highly branched, may reach 6 inches thick, woody

 Flowers: long round featherlike catkins, bloom April - June

Seeds: Found in dry, 2-valved capsules generally less than 0.25 inches.

Seedling: Noted for rapid growth and long narrow leaves.

ECONOMIC IMPORTANCE

Control is difficult and expensive if growth is unchecked.

LIFE CYCLE

Reproduction: annual

Propagation: seed

 Dispersal: air, wind, and water

DISTRIBUTION

State: Very common throughout Wisconsin.

 National: Found in moist soils throughout all continental United States.

 Origin:

ENVIRONMENTAL FACTORS

Prefer moist soil conditions. Very invasive competitor in new and established cranberry beds. Found along streambanks, drainage ditches and floodplains.

SCOUTING PROCEDURE/ET

While scouting a cranberry bed for disease and insect pests, identify weed populations as they arise. Note the specie(s) of weed present as well as the population level relative to field area. Example: 20% willow, 40% boneset and joe-pye weed mix.

REFERENCES

Dana, M. 1987. Cranberry Weeds in Wisconsin. Department of Horticulture, University of Wisconsin-Madison. Madison, Wisconsin. p. 31.

 

Gleason, H. A. 1952. Illustrated Flora of the United States and Adjacent Canada. Vol 2. Lancaster Press, Lancaster, Pennsylvania. p. 6-23.

Kummer, L. D., T. G. Dittl, and T. D. Planer. 1993. Wisconsin Cranberry Weeds. Wisconsin Cranberry Board, Wisconsin Rapids, Wisconsin. p. 22.

 

McGregor, R. L. 1986. Flora of the Great Plains. University Press of Kansas, Lawrence, Kansas. p. 281.


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