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23 Cards in this Set
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Wild Oats (Avena fatua)- -grass family (Graminaceae) -tall annual winter weed -grows on a variety of soils *causes problems with young plants and on new fields converted from grazing lands |
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Chickweed (Stellaria media)- -Pink Family (Caryophyllaceae) -annual, succulent, low growing, winter weed *problem in moist areas *dies in dry heat |
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Mustard (Brassica nigra and B. campestris)- -Mustard Family (Cruciferae) -large, rapidly growing, annual weed *houses overwintering pests *outcompetes young vines *sets many years worth of seeds
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Wild Radish (Raphanus sativus)- -Mustard Family (Cruciferae) -tall branching annual -white or pink flowers |
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Shepherd's Purse (Capsella bursa-pastoris)- -Mustard Family (Cruciferae) -annual -long-lived persistent seeds |
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Filaree (Erodium cicutarium)- -Geranium Family (Geraniaceae) -nickname "Crane's Bill" -native annual -widespread *can effect young vines |
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Groundsel (Senecio vulgaris)- -Sunflower Family (Compositae or Asteraceae) -annual winter weed in California |
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Annual Bluegrass (Poa annua)- -annual grass -germinates in fall and grows until the weather warms *problematic with young vines |
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Italian Ryegrass (Lolium multiflorum)- -mostly annual and seeded *aggressive root system that competes with young vines |
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Miner's Lettuce (Montia perfoliata)- -Purslane Family -common winter weed -prefers wet shady areas *edible and not very aggressive |
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Red Maids (Calandrinia ciliata)- -Purslane Family -common winter weed -flowers open in sunshine -dies out quickly in dry warm weather *not aggresive |
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Pineapple Weed (Chamomilla suaveolens)- -Sunflower Family -Nickname "False Chamomile" -grows on compact soil and roadways *not aggresive |
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Milk Thistle (Silybum marianum)- -Sunflower Family -large winter spring weed -sharp thorns *aggresive -can get 6-7 feet tall |
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Prickly Lettuce (Lactuca serriola)- -Sunflower Family -common in agricultural and urban areas *aggressive tap root *problem for young vines |
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Bermuda Grass (Cynodon dactylon)- -grass (Gramineae or Poaceae) -common perennial in warm areas *very invasive *drought and alkali tolerant *spreads by seed, rhizome and plant parts |
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Johnsongrass (Sorghum halipense)- -tall, perennial grass *spreads from seed and rhizome *rhizomes easily break and move with cultivation *seeds remain viable for many years before germination |
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Barnyard Grass (Echinochloa crusgalli)- -nickname "Watergrass" -annual *invasive *note: similar to Johnsongrass but annual and shorter |
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Nutsedge (Cyperus esculentus)- -Sedge Family (Cyperaceae) -yellow perennial *Nutsedge and its cousin C. rotundus are among the most serious weed pests in the world *few fertile seeds *abundant production of tubers and nutlets *very common in central valley California |
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Curly Dock (Rumex crispus)- -Buckwheat Family (Polygonaceae) -annual/ biennial *widely dispersed on low and neglected land -good indicator of high water and swampy conditions |
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Cheeseweed (Malva parvifolia)- -Mallow Family (Malvaceae) -annual/ biennial -common -large almost grape-like leaves -small white to pink flowers |
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Field Bindweed (Convolvulus arvensis)- -Morning-Glory Family (Convolvulaceae) -twinning weak-stemmed perennial -grows from huge perennial root system -spreads through seeds *most noxious of broad leafed weeds |
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Puncture Vine (Tribulus terresterus)- -Caltrops Family (Zygophyllaceae) -annual -prostrate weed -sharp seedpods -common on dry soil in Central Valley and North Coast |
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Dandelion (Taraxicum officinale)- -Sunflower Family (Asteraceae) -perennial -spreads readily form seeds -perennial from large taproot *hosts tomato ringspot virus, the cause of grapevine yellow vein |
