east texas' top 7 weeds of...
TRANSCRIPT
East Texas'East Texas'Top 7 Weeds of Spring/SummerTop 7 Weeds of Spring/Summer
any plant that crowds out cultivated plants
A plant considered undesirable, unattractive, or troublesome, especially one growing where it is not wanted, as in a garden
7. Dollarweed7
A.K.A. Pennywort ‐ PerennialThrives in warm, temperate regionsAquatic plant that often inhabits moist sites in lawnsLeaves bright green and round with wavy marginsFlowers tiny, with five star‐shaped white petalsLeaf petiole attached center of leaf Reproduces by seeds, rhizomes, and tubers
The following products are listed for educational purposes only and t t h ti li t f ll d t t thmay not represent an exhaustive list of all product types on the
market. No endorsement of any trade names is made or implied.
No effective pre emergent control product
Post emergent broadleaf product labeled for lawn:Centipede and St Augustine – Atrazine*Centipede and St. Augustine AtrazineZoysia and Bermudagrass – Imazaquin*
*not to be used during Spring green up or new plantingsRepeat applications of 2 4 D + MCPP + dicamba**Repeat applications of 2,4‐D + MCPP + dicamba
**Three Way
H d di iHand digging
Increase turf density by fertility, mowing & irrigationIncrease turf density by fertility, mowing & irrigation
7. Dollarweed
6. Lawn Burweed
Annual (Cool season)A.K.A. Spurweed or StickerweedLeaves have a parsley like appearanceSeeds clustered in leaf axils with sharp spinesCan cause injury to humans
Post emergent broadleaf herbicide before bloomgThree Way ProductsImaziquin
P i i i (if l b l d)Pre emergent – simazine or atrazine (if labeled)
7. Dollarweed
6. Lawn Burweed
5. Crabgrass5 g
Spreading blue‐green annualg gCommon weed across the U.S.Common invader in lawns and gardensUsed in pastures in Oklahoma and Arkansas
Pre emergent control (St Augustine or Centipede)g gearly Marchearly JuneO li B l B fi P di th liOryzalin, Balan, Benefin, or Pendimethalin
Post emergent controlPost emergent controlCentipede – sethoxydimSt. Augustine – atrazinegBermuda and Zoysia ‐MSMA
7. Dollarweed
6. Lawn Burweed
5. Crabgrass
4. Bermudagrass
Sod forming perennialgBrought to the US from Africa around 1751Has been selectively bred for many purposesCommon grass used in pastures , turf, and sports fieldsSpreads by stolons, rhizomes, and seedsNamed among the top three weeds in many countries
Control in Ornamental BedsMake sure the bed is well constructed
ALL th l t i th b d t b th l b l ALL the plants in the bed must be on the label, if not DO NOT USE!FluazifoppSethoxydimClethodim
7. Dollarweed
6. Lawn Burweed
5. Crabgrass
4. Bermudagrass
3. Sandbur
Yellow‐green annual, mostly erectgCan form mats in a lawnsProminent in sandy soils across southern U.S.Spiny burs cause painful injury Burs become a nuisance entangled in pet fur
Improve turf management practicesPre emergent
PendimethalinBenefin + OryzalinBenefin + OryzalinOryzalinTrifluralin/BenefinLi h A li i Mid M h 6 k lLight ‐ Application #1 – Mid‐March, #2 – 6 wks. laterHeavy ‐ Application #1 – then every 6 wks. through Sept.
Post emergent MSMA + Imaziquin – for Bermuda lawns only
7. Dollarweed
6. Lawn Burweed
5. Crabgrass
4 Bermudagrass4. Bermudagrass
3. Sandbur
2. Nutsedge
Sedges 4th largest plant family in Texasg gAnnual and perennial sedges foundNo significant cropsTriangular stems Leaves in whorls of 3Yellow – terminal tubers, slender leaf tipsPurple – chains of tubers, tapered leaf tips
Control in LawnsBermuda only – Imaziquin + MSMA**Do not use during green up or fall transition
Control in Ornamental BedsMake sure all plants in the bed are on the list!Make sure all plants in the bed are on the list!Pre emergent – MetolachlorPost emergent – Imazaquin
7. Dollarweed
6. Lawn Burweed
5 Crabgrass5. Crabgrass
4. Bermudagrass
3. Sandbur
2 Nutsedge2. Nutsedge
1. Buttonweed
A.K.A. Virginia ButtonweedgCreeping, spreading perennialHard to see in thick lawns Button like seed capsules at leaf/stem junctionFour white petals give flower a star‐like appearance
No effective pre emergent control productg
Control excess watering of lawns and good drainage
Repeated applications of broadleaf herbicides to suppress – no effective solution so far:
Bermuda, Centipede, St Augustine & Zoysia –“Three Way”Three WayCentipede & St Augustine – atrazine (pre emerge)
7. Dollarweed
6. Lawn Burweed
5. Crabgrass
4. Bermudagrass
3. Sandbur
2. Nutsedge
1 Buttonweed1. Buttonweed
