* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download MSdoc - Stevens County
History of herbalism wikipedia , lookup
Plant stress measurement wikipedia , lookup
Evolutionary history of plants wikipedia , lookup
Plant nutrition wikipedia , lookup
Plant secondary metabolism wikipedia , lookup
History of botany wikipedia , lookup
Plant defense against herbivory wikipedia , lookup
Venus flytrap wikipedia , lookup
Gartons Agricultural Plant Breeders wikipedia , lookup
Plant use of endophytic fungi in defense wikipedia , lookup
Plant breeding wikipedia , lookup
Plant physiology wikipedia , lookup
Ornamental bulbous plant wikipedia , lookup
Flowering plant wikipedia , lookup
Plant morphology wikipedia , lookup
Plant evolutionary developmental biology wikipedia , lookup
Plant reproduction wikipedia , lookup
Plant ecology wikipedia , lookup
Sustainable landscaping wikipedia , lookup
Glossary of plant morphology wikipedia , lookup
Spiny sowthistle Sonchus asper L. Sunflower Family Key identifying traits Leaves are a bluish-green color Plants usually grow from 1-5’ tall Lower leaves are lobed and toothed and have spiny margins Plants contain a milky sap Flowers are yellow and resemble dandelions Mature seed have a white feathery pappus that collectively form a white "puff ball" Stem leaves are very prickly and clasp the stem Biology and ecology An annual or winter annual spreading by seeds It grows in landscapes, winter small grains, pastures, hay fields, orchards, and roadsides This plant was introduced from Europe and now can be found almost everywhere throughout the U.S. Control Prevention – Learn to identify plants; start monitoring early in the season Biological – No known biological control in our area Cultural – Plant competitive grass or other cover crop Mechanical – Tilling and mowing are effective control if done before flowering occurs. Chemical – Spiny sowthistle is susceptible to many herbicides: refer to the PNW Weed Management handbook for specific chemical recommendations. Herbicides should be applied as soon as the plant is actively growing in the spring. Where found – Scattered throughout Stevens County but usually not a problem except in grain crops, gardens or landscape areas. All Photos Richard Old, XID Services, Inc. Stevens County Noxious Weed Control Board, January 2010