Parsley Piert Weed Control

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Parsley Piert Weed Control

Parsley Piert Weed Control

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Keith's Pro Tips

"Remember that new parsley piert plants establish wherever turf has been thinned out, especially in the fall. Therefore, be careful when applying herbicides to ensure the turf does not get damaged removing parsley piert, as this could lead to further invasion by new seedlings."

Parsley Piert Control: How To Get Rid of Parsley Piert

This article is a general DIY guide for parsley piert control. By using the products and methods suggested you will reduce and control parsley piert weeds  around your home. Follow this guide and use the recommended products and we guarantee a great decrease in your parsely piert weed population.

Parsley Piert, also known as aphanes arvenis, is a winter annual breed that commonly infests lawns that have excess soil moisture. This freely branched weed ranges if often overlooked due to its small size and short growing season. 

This troublesome weed that will persist in a variety of growing conditions, but is often most noticed in disturbed soil and areas where turf is weak. As a result, this weed is very common in landscape beds as well as turf sites of residential properties. 

Parsley piert develops a deep fibrous root system and exhibits a prostrate growth habit that allows it to survive frequent mowing at varying blade heights and a range of soil site conditions. This weed is also difficult to control due to its ability to be resistant to a wide range of selective herbicides and its ingredients. 

If parsley piert is uglying up your lawn, our DIY treatment guide can help. The directions below were recommended by our lawn care experts and will show you how to properly eliminate parsley from your property.

Identification

Parsley

Before proceeding with treatment, you will need to be certain that the type of weed infestation you have is parsley piert. Careless identification can lead you to using the wrong herbicides, which can be a waste of your time and finances. 

  • Parsley piert is a winter annual broadleaf weed that has several loose branches and grows low to the ground. It is approximately 1 to 3 inches tall. 
  • Each leaf contains 3 lobes and each of these lobes or leaflets are subdivided into 3 to 4 lobes. 
  • When parsley piert has matured you will see flowers which are small and green formed at the axis of the leaves. 

Use the description and image above to help you properly identify parsley piert on your property. If unsure, contact us and send a photo of your weed through email or in person at one of our stores to help you identify the weed and suggest treatment options.

Inspection

Parsley

Once confirmed that you are dealing with parsley piert, you can then move on to inspection. During this phase, you will locate areas where parsley piert is thriving and observe the conditions that are allowing it to thrive. This information will help you in knowing where to focus your herbicide application.

Where to Inspect

Parsley piert are commonly found in dry, open soils with thin turf and good soil moisture such as in lawns, fields, landscape beds, and pastures. It will also grow in dormant warm-seasoned turf, disturbed sites, and wastelands. 

What to Look For

Parsley piert is a weed that often goes unnoticed due to its small size and ability to emerge in cooler weather. This weed often becomes established in Autumn, setting seeds in the spring or early summer then dye off when temperatures increase in the late spring and summer. 

Once they emerge, parsley piert can be recognized by its tight, low-growing mat formations. 

Treatment

Always wear the proper personal protective equipment (PPE) when mixing and applying herbicides.

Parsley Piert is a tricky weed to control because it as shown to be resistant to selective herbicides.

The best way to remove parsley piert is to encourage thick, healthy grass growth. You will need to employ frequent applications with a systemic herbicide. 

Products containing MCPA, 2,4-D, dicamba, mecoprop, triclopyr, or clopyralid are not entirely effective against parsley piert weeds. However, products containing picloram, glyphosate, or sulfentrazone have shown the best results for parsley piert control. 

Step 1: Mix and Apply Herbicide

Mixing HerbicideExpel Turf Herbicide is a selective, post-emergent herbicide that controls over 50 types of weeds such as parsley piert in warm-seasoned and cool-seasoned turf.

Contains the active ingredient sulfentrazone 39.6%, which will move throughout the parsley piert weed to the roots for complete death. 

This concentrate product will need to be mixed with a backpack sprayer or spray rig for larger applications. 

Determine how much Expel Turf Herbicide to use by measuring the square footage of the treatment area. To do this, measure the length and width of the treatment area in feet then multiply them together (length X width = square footage). 

To get rid of parsley piert in cool-seasoned turf, use 4 to 8 fl. oz. of Expel Turf Herbicide in 10 gallons of water per acre. 

To kill parsley piert in warm-seasoned turf, use the rate of 8 to 12 fl. oz. of product in 10 gallons of water per acre.  

Fill your selected sprayer with half the amount of water, add the measured amount of Expel Turf Herbicide, then add in the remaining half of water. Close the spray tank lid and shake until evenly mixed.

Spray the top and bottom of parlsey piert weed leaves until wet, but not to the point of runoff. 

After 24 hours have passed after application the parsley piert will become discolored and perish. 

Step 2: Reapply 

Selective Herbicide

If parsley piert is still present after the Expel Turf Herbicide application, then you can apply a second application when 35 days have passed from the first treatment. 

Do not apply more than 12.0 fl. oz. product (0.375 Ibs sulfentrazone) per acre per 12 month period. The 12 month period starts at the point of first application.

Prevention

Parsley Piert Nitrophos Barricade

Once parsley piert has been eliminated from your property, you will need to implement some preventative measures which will ensure that this winter annual weed does not return.

  • Parsley piert is an aggressive weed that can easily overtake thin or bare turf areas. The more dense the vegetation the better this weed cannot grow so we recommend thickening up your turf with a product like Solutions 15-5-10 Weed & Feed with Trimec. Solutions 15-5-10 Weed & Feed with Trimec is a dual combined fertilizer and weed killer that promotes healthy turf growth and controls weeds like parsley piert in one application. Mow your lawn to normal height 1 to 2 days before application. For most applications you will need to apply 3.2 to 4.0 lbs. of Solutions 15-5-10 Weed & Feed with Trimec per 1,000 sq. ft, of treatment area. With a push or broadcast spreader, spread the product  evenly across the treatment area. After 1 to 2 days have passed after application, water the granules in thoroughly with water. 
  • Adjust the blades on your mower to avoid mowing too low and potential scalping as increased stress on turf can create suitable conditions for weed growth.
  • Maintained a balanced watering program for turf by using no more than 1 inch of irrigation once per week. Watering in the morning would be best as this will help to avoid heat stress on plants and avoid fast water evaporation. 
  • In most scenarios, a single application will not be enough to control a parsley piert weed infestation. Further and frequent applications with a systemic post-emergent herbicide like Expel Turf Herbicide will be needed. 

Key Takeaways

What is Parsley Piert?

  • Parsley Piert is one of the most difficult freely branched winter annual weeds to control on home lawns because of its persistence and resistance to herbicides.

How to Get Rid of Parsley Pierts

  • Our top recommendation for treating parsley Piert is to use a systemic post-emergent herbicide like Expel Turf Herbicide. 

Preventing Parsley Piert Reinfestations

  • Parsley piert can be prevented with occasional fertilization. Maintain a good fertilization schedule for your lawn so your lawn is getting adequate nutrients in the soil with a product like Solutions 15-5-10 Weed & Feed with Trimec. Adjust other cultural practices such as watering and mowing as well. Continual applications with Expel Turf Herbicide will help to further prevent parsley piert as well. 
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