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Topic: Crabgrass

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	Crabgrass Management Guidelines--UC IPM
		Crabgrass is found in turfgrasses (mostly smooth crabgrass) and in ornamental landscapes (primarily large crabgrass).
		Smooth crabgrass is a low-growing, summer annual plant that spreads by seed and from rootings of the culm nodes (joints) that lie on the soil.
		The flowering stems of crabgrass are similar to those of bermudagrass (Cynodon dactylon), but the spikelike branches on the flowering stems of bermudagrass originate at the same point whereas those on crabgrass originate about 1/8- to 1/4-inch apart at the end of the stem.
	www.ipm.ucdavis.edu /PMG/PESTNOTES/pn7456.html (1858 words)

	Turf Weeds--Crabgrass
		Large crabgrass, also known as hairy crabgrass, finger grass, crow foot, purple crab-grass and Polish millet, is native to Europe or Eurasia and is distributed worldwide.
		Crabgrass continues to grow until midsummer when days become shorter, and vegetative growth slows as plants enter their reproductive stage.
		Crabgrass cannot be controlled in one growing season because of the great number of viable seeds that accumulate in the soil from years of infestation.
	www.uri.edu /ce/factsheets/sheets/crabgrass.html (748 words)

	WeedAlert.com Weed Listing (Large Crabgrass)
		Crabgrass is a summer annual that germinates when soil temperatures reach a consistent 55 degrees F and is generally killed at the first frost.
		Crabgrass leaves are rolled in the bud; the first leaf appears short, wide and blunt-tipped.
		Crabgrass is light green in color, coarse bladed and will root at the nodes when they touch the ground.
	www.weedalert.com /weed_pages/wa_crabgrass.htm (222 words)

	Alabama Forages
		Crabgrass should be planted on a clean, fresh seedbed after the danger of frost is past in spring.
		Though disking a field to encourage volunteer crabgrass may be most appropriate in mid-spring in a field in which it is alternated with winter annuals, it will otherwise be best to disk a field in which there is known to be adequate crabgrass seed in late February or early March.
		Crabgrass should be cut for hay in the boot to heading stage (normally 18 to 24 inches high) which should allow at least two harvests per year.
	www.aces.edu /dept/forages/miscellaneous/ForageCrabgrass03.htm (1423 words)

	Crabgrass
		The leaves of large crabgrass are pale blue green, pubescent on both sides, and with margins that may be rough.
		Smooth crabgrass leaves are normally dull green, sometimes purple tinged, and with margins that may be rough.
		The flowers of smooth crabgrass are borne in a raceme with 2 to 6 finger-like, purplish spikes up to 4 inches long, and at end of flowering stalks.
	www.turf.uiuc.edu /weed_web/descriptions/crabgrasses.htm (282 words)

	Johnson's Florist & Garden Centers
		Crabgrass is the primary weed pest of the Mid-Atlantic region.
		Since crabgrass is an annual weed, it will die with the first hard frost, leaving unsightly patches in the turf and enormous quantities of seed behind.
		Crabgrass seeds begin germinating in the Washington area approximately the first week of April (weather depending) and continue to germinate until the beginning of July.
	www.johnsonsflowers.com /crabgrass.html (608 words)

	Lawn Talk - University of Illinois Extension
		Crabgrass often invades areas seeded in late spring because of bare soil, frequent watering, and onset of hot weather, ideal for its growth.
		Crabgrass will germinate when soil temperatures are greater than 55 to 60 degrees F for 7-10 consecutive days, and continues until soils reach 95 degrees F. Other annual grasses germinate as soils get warmer than 60 degrees.
		Postemergence crabgrass herbicides need to be applied when crabgrass plants are very small; typically crabgrass is noticed too late for these to be effective.
	www.urbanext.uiuc.edu /lawntalk/lawntalk20.html (470 words)

	Controlling Crabgrass
		Crabgrass requires plenty of light to germinate, so keep the grass as thick and long as possible to create shade near the soil surface.
		Use a pre-emergent herbicide during the late winter or early spring of the next year to prevent any crabgrass seeds left behind from developing at their next opportunity.
		If the majority of your lawn is crabgrass, it may be best not to remove it during the summer.
	www.lowes.com /lowes/lkn?action=howTo&p=LawnGarden/crabgrass&print=true (1144 words)

	Scotts: Keep Crabgrass Out of Your Lawn
		Researchers studying crabgrass at the University of Maryland and Cornell University have determined that turf density (the size of the gap between individual grass plants) plays an important role in the fluctuation of soil temperature.
		As a rule of thumb, lawn experts suggest that a crabgrass pre-emergent should be applied in early spring during the time when forsythia flowers start to wither and before lilac begins to bloom.
		Crabgrass won't be fully noticeable in the lawn until early summer, not the spring.
	www.scotts.com /index.cfm/event/Article.Detail/documentId/7b44b0c3e1d7815a893c08fb9f926ded (975 words)

	Crabgrass (Site not responding. Last check: 2007-10-19)
		Crabgrass is sometimes confused with either quackgrass (Agropyran reptans) or tall fescue (Festuca arundinacea), particularly in the spring, as both of these are also unattractive and stand out in the lawn.
		Because crabgrass does not germinate until mid-to-late spring, it is typically a very small plant during the growing season, and should not be confused with larger weeds like quackgrass or tall fescue.
		Crabgrass can be controlled both before and after it appears in a lawn through pre- and post emergent methods.
	www.yarddoctor.com /display/router.asp?docid=80805 (903 words)

	Preventing Crabgrass Problems in Lawns
		Crabgrass will not start germinating until soil temperatures get close to 60 degrees and stay there for several consecutive days, which most likely is not until late May or early June in lawn areas.
		Crabgrass prefers full sun, moisture, and thin lawns that allow light to hit the soil.
		Most preemergence crabgrass herbicides are found in combination with lawn fertilizers, so crabgrass prevention and spring fertilization can be done at the same time.
	www.urbanext.uiuc.edu /stateline/010322.html (328 words)

	CrabGoose Control
		Crabgrass seed normally begin germinating after March 15 in Southern and Eastern Shore Maryland, after April 1 in the Baltimore-Washington D.C. corridor, and in late April in western counties.
		Crabgrass and goosegrass plants are then killed by early frosts in the fall.
		Crabgrass and goosegrass are easiest to control with postemergence herbicides when they are small, and in the 2- to 4 leaf stage of growth.
	iaa.umd.edu /umturf/Weeds/CrabGoose_Control.html (2549 words)

	crabgrass (Site not responding. Last check: 2007-10-19)
		Crabgrass is not a native grass of the United States.
		Although small amounts of crabgrass in a hayfield is not harmful, large sections of crabgrass can reduce overall yields of the hayfield.
		Fields that exceed 10 percent crabgrass should be sprayed with an appropriate herbicide to reduce the negative effects.
	www.ces.uga.edu /johnson/crabgrass.html (455 words)

	Crabgrass Control (Site not responding. Last check: 2007-10-19)
		When crabgrass is only a minor problem in an otherwise healthy lawn the best control method is pre-emergent herbicides applied in the spring.
		If crabgrass infestations were not serious, the recommendation would be to wait until next spring and assess the amount of desirable grasses still in your lawn.
		At the time of crabgrass death, it is usually too late to seed new plantings because the soil is too cold.
	www.canr.uconn.edu /garden/CrabgrassControl.htm (635 words)

	Dealing With Crabgrass and Quackgrass in the Lawn
		Crabgrass (Digitaria sanguinalis) is an annual grassy weed with broad blades that have a rough texture and are a lighter green than turf grasses.
		Crabgrass is a low-growing weed with lots of branches that form clumps.
		Most crabgrass preventers are a combination of fertilizer and pre-emergent herbicide to help strengthen the turf grasses and make them more competitive.
	www.bachmans.com /tipsheets/lawn/CrabgrassandQuackgrass.cfm (1015 words)

	Crabgrass
		Crabgrass flowers throughout the summer and is a prolific seed producer.
		Crabgrass has one significant weakness in that the seed requires light to germinate.
		For best crabgrass control, turf should not be mowed for 2 to 3 days prior to application or 2 to 3 days after application and temperatures should be 80 to 90°F at the time of application.
	aggie-horticulture.tamu.edu /plantanswers/turf/publications/weed12.html (806 words)

	Crabgrass (Site not responding. Last check: 2007-10-19)
		Crabgrass is very difficult to identify early in spring since only plant skeletons are present at this time.
		Crabgrass is best identified in summer or fall for control in fall or the following spring.
		Crabgrass in the lawn can be reduced over a few seasons of special care.
	www.hemlocklandscapes.com /Crabgrass.htm (258 words)

	Crabgrass and crabgrass control
		Crabgrass is a summer annual that begins to germinate in early spring, and germination continues through summer.
		The onset of crabgrass germination varies from year to year based on weather conditions, so you could be too early with an application if you use a calendar-year approach, the blooming of forsythia or some other method for predicting germination.
		Crabgrass is easier to control when plants are in the pre-tillering stage.
	grounds-mag.com /mag/grounds_maintenance_crabgrass_control/index.html (1658 words)

	Crabgrass Control
		Crabgrass is one of the most invasive annual grasses in lawns and gardens.
		Crabgrass is a bunch-type grass with erect stems and pale green leaves about 1/4 inch wide that taper to a point.
		In early spring when crabgrass seeds are just waiting to germinate in warm, moist soil (usually when forsythia is in bloom), apply a pre-emergent crabgrass control such as Statesman 1 Fertilizer Plus Crabgrass Preventer or Statesman Crabgrass Control.
	gardencenter.southernstates.com /lawn/crabgrass.shtml (283 words)

	ProGardenBiz Community: Crabgrass - Fighting Lawn Care's Enemy
		Crabgrass is sometimes confused with either quackgrass (Agropyran reptans) or tall fescue (Festuca arundinacea), particularly in the spring, as both of these are also unattractive and stand out in the lawn.
		Because crabgrass does not germinate until mid-to-late spring, it is typically a very small plant during the growing season, and should not be confused with larger weeds like quackgrass or tall fescue.
		Crabgrass can be controlled both before and after it appears in a lawn through pre- and post emergent methods.
	www.progardenbiz.com /public_html/article.php?story=2004052418472727&mode=print (938 words)

	Hort-Pro - Crabgrass
		Crabgrass is rarely present in lawns that are properly fertilized, watered and mowed correctly at a height of at least 5-6cm (2-2.5 inches).
		Crabgrass is an annual weed that spouts from seed in late May to early June.
		Crabgrass control is best performed in the spring in an effort to stop crabgrass plants from germinating and growing.
	www.rittenhouse.ca /hortmag/glynis/crabby.asp (873 words)

	[No title]
		Metabolism and differential susceptibility of crabgrass and witchgrass to simazine and atrazine.
		Competition between corn and crabgrass and corn and lambsquarters as influenced by N and K levels and spacings.
		Jagschitz, J.A. Tolerance of nutsedge, crabgrass and turfgrasses to postemergence herbicides.
	www.agron.iastate.edu /~weeds/weedbiollibrary/u4crab2.html (4260 words)

	Persons tired of a crabgrass lawn have several options
		Crabgrass germinates in the spring season, or later, in some cases, and remains small for about a month.
		The problem is crabgrass is an annual leaving these areas bare, with nothing to fill in next year, except more crabgrass later in the season.
		If you have crabgrass, you best bet is to power rake the lawn in early September and overseed with more grass seeds scattered in the "grooves" left from power raking.
	www.hpj.com /lifestyles/highplainsgarden/crabgrass8301.htm (497 words)

	Crabgrass and crabgrass control
		Crabgrass is a summer annual that begins to germinate in early spring, and germination continues through summer.
		The onset of crabgrass germination varies from year to year based on weather conditions, so you could be too early with an application if you use a calendar-year approach, the blooming of forsythia or some other method for predicting germination.
		Disadvantages of post-emergence crabgrass control are the greater risk of turf injury posed by certain of the available products, short soil residual for most choices and reduced control at later growth stages of crabgrass.
	bg.grounds-mag.com /ar/grounds_maintenance_crabgrass_control (1762 words)

	SPLENDOR IN THE CRABGRASS - E. Ginsburg
		For those who have just moved in from some barren planet, crabgrass is an annual weed that appears in mid to late summer.
		Crabgrass settled in faster than you can say "herbicide" and has lived here in not-so-peaceful coexistence with homeowners ever since.
		After going over the undesirable traits of crabgrass, the text reads, "crabgrass can overtake large sections of your yard over the course of a season or two, especially if you have an older, tired lawn that hasn’t been renovated for many years." Since this describes my lawn to a "T", I take note.
	www.backyardgardener.com /ginsburg/column191.html (850 words)

	Controlling Crabgrass
		That means that crabgrass comes back each year from seed and this seed does not germinate [1] until the soil temperatures are in the low to mid 60's.
		This is often mixed in with a fertilizer and sold as crabgrass preventer [2].
		Remember, when the crabgrass really becomes visible in August, it is then too late, short of hand weeding, to get rid of it.
	www.mrs.umn.edu /pyg/tips/lawn/tip_1224.shtml (306 words)

	Weed Wizard: Control Crabgrass in Ornamentals
		All crabgrasses have similar growth habits and flowering structures, but species are separated by minor differences in the flower structures and leaf pubescence.
		First, all crabgrasses are annual weeds, and a single plant is capable of producing 150,000 seeds in one season.
		Crabgrass traditionally has been controlled with preemergent herbicides (Table 1) applied early in the spring, which prevent crabgrass seeds from germinating.
	pubs.caes.uga.edu /caespubs/pubcd/C867-7.htm (882 words)

	Elstel Farm & Seeds : Red River CRABGRASS VARIETY Fact Sheet 1999
		Crabgrass is usually grown for pasture, hay, and conservation in some manner.
		Crabgrass may also be grown in mixtures with numerous other forages.
		If an early, lush, crabgrass hay crop is taken before the crabgrass drops seed, be sure to manage for seed drop in the next regrowth.
	crabgrass.hypermart.net /factsheets/rr1999.html (831 words)

	ArtKnapp.com - Crabgrass (Site not responding. Last check: 2007-10-19)
		Crabgrass is a low growing annual weed that can become established in lawns.
		Crabgrass thrives in lawns that are improperly watered and fertilized.
		Crabgrass seed needs high light levels to germinate, so cutting the lawn higher will shade the roots and provide less light.
	www.artknapp.com /grabgrass.html (225 words)

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