What is preemergent herbicide?

Preemergent herbicides are chemicals that prevent the germinating weeds from establishing in the lawn or flower beds unlike post emergent herbicides. These herbicides control annual grass weeds by inhibiting cell division in the young root system. The failure of the root system to develop results in the death of the young seedling weed shortly after germination.

We are told over and over again that a thick health lawn will grow no weeds and that is true for the most part, but we all struggle with certain areas that are thin or struggling. So for homeowners who cannot satisfactorily address the control of annual grass weeds in a preventive manner using only cultural controls, the best way to stop annual grass weeds from establishing in their lawns is through the use of preemergent herbicides.

Pre-emergent Herbicide

At evegetationmanager we offer a complete line of commercial pre-emergent herbicides for use in residential, commercial, and recreational turf grasses. In addition we carry herbicides for preventing undesired weeds from establishing in landscape and ornamental and flower bed areas. Pre-emergent herbicides can be an excellent tool for preventing weeds from becoming established and spreading.

Pre-emergent herbicides can be purchased in easy to apply liquid and granular forms and are typically applied 2 to 3 times per year, depending on temperature and rain fall.

Evegetationmanager featured pre-emergent herbicides include Pendulum with Pendimethalin, Dimension with Dithyopyr, and Simazine.
Preemergent

	Prodiamine 65 WDG Generic Barricade 65 WDG 5lbs Code: prodiamine-65-generic-barricade Price: $125.99 Quantity in Basket: none
	Dimension 2EW Preemergent Herbicide with Dithiopyr Code: dimension-2ew-preemergent-herbicide-dithiopyr Price: $799.99 Quantity in Basket: none
	Goaltender Oxyfluorfen herbicide with pre and postemergent activity Code: Goaltender-Oxyfluorfen-herbicide-pre-postemergent Price: $202.99 Quantity in Basket: none
	Oryzalin 4 Pro Pre-emergent Herbicide Equivalent to Surflan AS 2.5 Gallons Code: oryzalin-4-pro-pre-emergent-herbicide-surflan Price: $238.74 Quantity in Basket: none
	Oxadiazon 2G Pre-emergent Landscape and Turf Herbicide Equivalent to Ronstar G Code: oxadiazon-2g-pre-emergent-ronstar-g Price: $111.99 Quantity in Basket: none
	Pendulum Aqua-cap Preemergent herbicide with Pendimethalin Code: pendulum-aqua-cap-preemergent-herbicide Price: $194.46 Quantity in Basket: none
	Pin-Dee Pre emergent Herbicide with Pendimethanlin Code: pin-dee-pre-emergent-herbicide-Pendimethanlin Price: $96.98 Quantity in Basket: none
	ProClipse 65 WDG Premergent Herbicide Equivalent to Barricade 5 Pounds Code: proclipse-65-wdg-premergent-herbicide-barricade Price: $125.99 Quantity in Basket: none
	Prowl H2O Herbicide with Pendimethalin Code: V10193prowl-h2o-herbicide-pendimethalin Price: $125.99 Quantity in Basket: none
	Simazine 4L Pre Emergent Herbicide for Broadleaf and Grass Suppression Code: simazine-4l-pre-emergent-herbicide-broadleaf Price: $83.12 Quantity in Basket: none
	Simazine 90 DF Preemergent Herbicide for Broadleaf and Grass Suppression Code: simazine-90-df-preemergent-herbicide Price: $71.38 Quantity in Basket: none
	SnapShot 2.5 TG Preemergent Herbicide Granules Code: snapshot-25-tg-preemergent-herbicide-granules Price: $146.99 Quantity in Basket: none
	Surflan As Pre-Emergent Herbicide with Oryzalin 8 oz Code: surflan-pre-emergent-herbicide-oryzalin-8oz Price: $16.09 Quantity in Basket: none
	PENDULUM 3.3 EC HERBICIDE 2.5 gallon Code: pendulum-3-3-ec-herbicide Price: $109.99 Quantity in Basket: none
	Pendulum 2G Turf herbicide 40 lb bag Code: pendulum-2G-turf-herbicide-pre-emergent Price: $69.94 Quantity in Basket: none
	Balan 2.5G Pre-Emergent BroadLeaf Herbicide 40 lbs Code: Balan-2-5-g-pre-emergent Price: $35.99 Quantity in Basket: none
	ProDeuce Dual Action Herbicide Code: prodeuce-dual-action-herbicide Price: $154.76 Quantity in Basket: none
	Barricade 65 WG 10 lb Pre-Emergent Code: barricade-65-wg-preemergent Price: $459.99 Quantity in Basket: none
	Dithiopyr 40 WSB Preemergent Herbicide Equivalent to Dimension Ultra Code: dithiopyr-40-wsb-preemergent-dimension Price: $223.20 Quantity in Basket: none
	Pennant Magnum 1 Gallon Pre-Emergent Code: pennant-magnum-herbicide Price: $239.00 Quantity in Basket: none
	Princep Liquid-2.5 Gallon Code: princep-liquid Price: $80.95 Quantity in Basket: none
	Oryzalin 4 Pro Generic Surflan A.S. Herbicide 2.5 gallon jug Code: Oryzalin-4-Pro-generic-surflan Price: $201.25 Quantity in Basket: none

Lawns with thin stands of grass that do not provide 100 percent cover may require yearly applications of a preemergent herbicide to prevent the invasion of crabgrass and other annual grass weeds.

Application times for most areas are March and September.

Pre-emergent herbicide is used early in the growing season and prevents seeds from germinating as the weather becomes warmer in the spring. The herbicide creates a barrier and seal around the seed, making it impossible for the seed to sprout and a new plant to grow.

Aerating or turning the soil in anyway will destroy the pre-emergent barrier, so do everything you need to get done before you put your preemergent out. I like to mulch on top of the pre-emergent as an added layer of protection.

Pre-emergent herbicides are available in a 2 different forms, liquid, and granular. I prefer the granular type because application is very easy and can be done very quickly with a drop spreader or hand held device.