What are Post-Emergent Herbicides and How Do I use Them?

June 15, 2016.4 Likes
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blog-22Weeds are an unsightly problem that nearly all gardeners must contend with at one point or another. Not only do they ruin the aesthetic of a well-cared-for yard, but their roots also often cause damage to nearby plants. Keeping a lawn or garden free of weeds can be a daunting task, especially during the spring and summer months. Weeds tend to thrive in garden beds because of the readily available water supply and nutrient-rich soil that gardeners provide. One common way to keep weeds at bay is to use a post-emergent herbicide.

Understanding Post-Emergent Herbicides

Post-emergent herbicides are some of the most popular substances for weed control. While pre-emergent herbicides work to prevent weeds from ever growing, post-emergent herbicides work on weeds that have already grown. They utilize a mixture of chemicals to kill the weed and ensure that it does not grow back. There are multiple types of post-emergent herbicides available to help eradicate different kinds of weeds in various environments.

Systemic vs. Contact Post-Emergent Herbicides

The main difference between systemic and contact post-emergent herbicides lies in how they destroy weeds. Systemic herbicides are specifically designed to be absorbed into the plant. This ensures that the entire structure of the weed, from the roots upward, is destroyed. These types of herbicides are ideal for stopping perennial weeds from returning. When it comes to getting rid of annual weeds, contact herbicides are a smart choice. They kill on contact, destroying the leaves and stem of a weed so that it cannot continue to photosynthesize.

Selective vs. Non-Selective Post-Emergent Herbicides

Another thing to consider when choosing a post-emergent herbicide is whether it is selective or non-selective. Selective herbicides are specifically designed to target weeds without damaging any surrounding grass. Non-selective herbicides are typically more powerful, but they usually kill any plants they come into contact with, including grass and other blooms gardeners may want to keep safe.

How to Apply Post-Emergent Herbicides

Park West uses various methods for applying post-emergent herbicides vary depending on the type of herbicide gardeners want to use. When applying systemic herbicides, simply saturate the ground around the base of the weed with the herbicide. For contact herbicides, it is important to cover all exposed leaves and stems with the substance. Both types of herbicides are potentially very toxic, so it is important to use them only in well-ventilated areas. Gardeners may also want to wear gloves and use a dust mask when applying herbicides to protect themselves from any direct contact.




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