How To Kill Crabgrass In Bermuda

How to Kill Crabgrass in Bermuda Lawns: A Comprehensive Guide

Crabgrass is a persistent weed that can quickly take over your beautiful Bermuda lawn, leaving it looking patchy and unhealthy. But don't despair! With the right approach, you can effectively eliminate crabgrass and restore your lawn to its former glory. This guide provides a comprehensive approach to killing crabgrass in Bermuda, focusing on both preventative measures and active eradication strategies.

Understanding Crabgrass and Bermuda Grass

Before diving into control methods, understanding the differences between crabgrass and Bermuda grass is crucial. This knowledge will help you choose the most effective treatments while minimizing damage to your desirable Bermuda turf.

Identifying Crabgrass:

• Appearance: Crabgrass has a distinct, sprawling growth habit with wide, flat blades that spread out horizontally. It's typically a lighter green than Bermuda grass.
• Texture: Crabgrass leaves are fuzzy and softer to the touch compared to the smooth texture of Bermuda grass.
• Growth Habit: Crabgrass spreads rapidly through seeds and by sending out runners, quickly forming dense mats.

Identifying Bermuda Grass:

• Appearance: Bermuda grass has a finer texture and grows upright, forming a dense, even turf.
• Texture: The leaves are smooth and feel slightly coarse.
• Growth Habit: Bermuda grass spreads through stolons (above-ground runners) and rhizomes (underground stems).

Effective Crabgrass Control Methods

Effective crabgrass control requires a multi-pronged approach combining pre-emergent and post-emergent herbicides.

1. Pre-Emergent Herbicides: Prevention is Key

Pre-emergent herbicides are applied before crabgrass seeds germinate. This is the most effective way to prevent crabgrass from establishing itself in the first place. Apply pre-emergent herbicides in early spring, before soil temperatures consistently reach 55°F (13°C).

Key Considerations:

• Timing is Crucial: Applying too early or too late reduces effectiveness.
• Soil Temperature: Monitor soil temperatures using a soil thermometer for optimal application timing.
• Product Selection: Choose a pre-emergent herbicide specifically labeled for use in Bermuda grass. Always follow label instructions carefully.

2. Post-Emergent Herbicides: Targeting Existing Crabgrass

If crabgrass has already sprouted, post-emergent herbicides are necessary. These herbicides target actively growing crabgrass plants.

Key Considerations:

• Identification: Ensure you accurately identify crabgrass before applying any herbicide.
• Herbicide Selection: Select a post-emergent herbicide that is effective against crabgrass and safe for Bermuda grass. Look for products labeled as "selective" herbicides.
• Application: Follow label instructions meticulously regarding application rate and method. Proper application is key to effectiveness and preventing damage to your Bermuda grass.
• Timing: Apply post-emergent herbicides when crabgrass is actively growing, typically in late spring and summer.

3. Cultural Practices for Long-Term Control

In addition to herbicides, cultural practices play a vital role in long-term crabgrass management:

• Proper Mowing: Maintain a healthy Bermuda lawn by mowing at the appropriate height (generally 1-1.5 inches) and regularly.
• Fertilization: Proper fertilization supports healthy Bermuda grass growth, helping it compete with crabgrass. Conduct a soil test to determine your lawn's nutrient needs.
• Watering: Water deeply and less frequently to encourage deep root growth. Avoid frequent, shallow watering, which favors shallow-rooted crabgrass.
• Thatch Removal: Excessive thatch can create a favorable environment for crabgrass. Consider dethatching your lawn as needed.

Conclusion: A Healthy, Crabgrass-Free Lawn

Eliminating crabgrass from your Bermuda lawn requires a combined strategy of preventative measures (pre-emergent herbicides) and targeted treatment (post-emergent herbicides). By understanding crabgrass biology, choosing appropriate herbicides, and implementing proper cultural practices, you can achieve a healthy, lush Bermuda lawn free from the nuisance of crabgrass. Remember to always read and follow the instructions on any herbicide label carefully.