How To Choose The Right Pre-Emergent: PRODIAMINE vs DITHIOPYR? (Crabgrass Preventer)

In today's video we revisit the topic of applying a pre emergent: prodiamine (Barricade) vs. dimension (Dithiopyr). Spring lawn care guides all over recommended one or the other of these pre-emergents. However, we dive deeper into application strategy and the unintended consequences of applying each of these pre-emergent herbicides. We specifically visit studies that show the impacts these herbicides have on bermudagrass, St. Augustine, Kentucky Bluegrass, and fescue. Ultimately, the question is: How to choose the right pre-emergent? Should I apply prodiamine or dithiopyr?

Many people are aware of the mitigation of lawn weed pressure from applying these chemistries, but how many of you are aware of the negative consequences? Truth be told, these herbicides do not effect the quality or diversity of your soil biology, rather they affect our desirable turfgrasses. Even hybrid bermudagrasses may face genetic mutations back to their original non-hybridized form as a result of their use.

By the end of this video, you will have a better understanding of how timing effects results but timing does not have much of an effect on the outcome of how badly these herbicides hurt our turfgrasses. You will also understand how application timing and soil structure can be the two most pivotal aspects of a successful pre-emergent program.

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Timestamps:
00:00 Intro
01:00 How Do They Work?
02:09 Do Pre-Emergents Prevent Germination?
02:39 Do They Negatively Affect The Soil?
02:56 Prodiamine Advantages
03:30 Dithiopyr Advantages
03:45 How To Control Crabgrass With Dithiopyr
04:30 Dithiopyr Soil Mobility
05:30 The Most Important Factor To Consider
06:25 Rutgers Timing Study
07:34 Root Pruning Potential
08:00 Penn State Root Pruning Study
08:45 Hybrid Bermuda DNA Herbicide Study
10:51 Common Bermudagrass DNA Herbicide study
11:15 Choosing The Right Pre-Emergent
13:03 Other Pre-Emergents?
13:56 Summary

#preemergent #prodiamine #dithiopyr

Sources:
Dinitroaniline‐Induced Genetic Changes in Bermudagrass
APPLIED TURFGRASS SCIENCE—BRIEFS - Preemergence herbicides applied in February are less effective than herbicides applied in April for smooth crabgrass control in New Jersey. Rutgers University
Preemergence Herbicide Effects on Hybrid Bermudagrass Root Architecture and Establishment
St. Augustinegrass Rooting following Preemergence Herbicide Application
Behavior of Dinitroaniline Herbicides in Soils
Effect of Root Pruning Preemergence Herbicides on Root Morphology of Kentucky Bluegrass (Poa prantensis L.)

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Видео How To Choose The Right Pre-Emergent: PRODIAMINE vs DITHIOPYR? (Crabgrass Preventer) канала The Grass Factor