Roundup

Goals

1. Describe what Roundup is and how it works.
   
2. Skillfully use Roundup to kill weeds while avoiding unintended damage.

What

Roundup is a brand of herbicide whose active ingredient is glyphosate. It is a non-selective, systemic herbicide, meaning it kills most plants it touches and is absorbed into the entire plant system.

How Roundup works:

• Glyphosate blocks a plant enzyme (EPSP synthase) critical for making certain amino acids.
• This disrupts growth and kills the entire plant, including the roots.
• Results typically appear within 2–7 days, though full effects can take up to 2 weeks.

Why Use Roundup?

Benefits

• Highly effective: Kills many types of annual and perennial weeds.
• Systemic action: Kills roots, not just leaves—reduces regrowth.
• Simple application: Comes in ready-to-use spray bottles or concentrate.

Concerns

• Non-selective: Will damage or kill any plant it touches, including flowers, vegetables, and grass.
• Persistent weeds: Some species (e.g., morning glory, Bermuda grass) require multiple applications or different methods.
• Environmental conditions matter: Effectiveness drops in wet or extreme temperatures.

How to Use Roundup Properly

1. Choose the Right Conditions

• Dry weather: No rain forecast for at least 6 hours after application.
• Temperature: Apply when it’s between 60°F and 85°F for best results.
• Low wind: Avoid drift onto desirable plants.

2. Prepare the Area

• Identify the exact weeds you want to eliminate.
• Clear access paths and isolate nearby plants you want to protect.
• Wear gloves, long sleeves, and eye protection for safety.

3. Apply Carefully

• Use a targeted spray for small areas or individual weeds.
• Use a shield or cardboard if spraying near flowers or vegetables.
• Apply to dry leaves, coating the surface without runoff.

4. Avoid Common Mistakes

• Do not apply just before rain or watering.
• Don’t mow before application—leave leaves exposed.
• Avoid over-application; more is not better and increases risk to soil or nearby plants.

5. Monitor and Reapply If Needed

• Check for results after 7–10 days.
• Reapply to stubborn weeds after 2–3 weeks.
• For invasive species, consider combining Roundup with mechanical removal or a long-term plan.

When using Roundup (or any herbicide), the recommended Personal Protective Equipment (PPE) includes:

• Gloves (chemical-resistant, like nitrile or rubber)
• Long sleeves and pants (to avoid skin contact)
• Closed-toe shoes (preferably waterproof or washable)
• Eye protection (safety glasses or goggles)
• Mask or respirator (optional, but useful if spraying in enclosed or windy areas)

Summary

Roundup is a powerful herbicide when used under the right conditions. Use it with care—only when needed, and with respect for the plants and ecosystem around it.