How does weed killer work?

How does weed killer work: To know about the working process of weed killers, we need to know what weed is? There are various kinds of weed. According to the type of weed, you have to choose the right weed killer to get rid of them.

What is a weed?

According to the dictionary, weed is a wild or not cultivated plant growing in a place where it is unwanted. By the definition, any kind of plant that grows naturally where we don’t want it is called weed. These unwanted plants work as an obstacle on your paths and invade flower, lawns that are the main problem. 

what is a weed

What is a weed killer?

Weeds can be so much frustrating and sometimes become very difficult to remove. Most of the time, traditional weed removal methods cannot remove weeds completely. In this case, we need to apply a more effective alternative to get rid of this weed problem. And the most effective alternative is to use a weed killer.

Weed killers are mainly chemical-based substances that are engineered to destroy weeds in the best possible way. Different types of weed killers are manufactured to target different types of weed. So, it would help if you chose this weed killer which is matched with the weeding job you need.

When and which weed killer should have to use according to the condition?

Generally, you can apply the weed killer at any time of the year for killing weeds. But the best time for using weed killers is the Spring and Autumn. Because weeds strongly grow up in this time and absorb weed killer quicker than any other time. Particularly, this case is for Selective and Systemic weed killers whose effectiveness depends on the plant’s activity. After applying this type of weed killer to the leaves, they move up to the weed’s growing points and the root tips. As a result, weeds become dead. To minimize the weed killer’s effect on your wanted plants, you should apply the liquid in calm weather. 

Weed’s Location also plays an important role here. For example, if any weed grow in the middle of your lawn then a selective weedkiller would be more appropriate for you to use. On the other hand, if it grows between paving or patios, then you should use residual weed killer. When you want to clear your land completely and want to plant trees quickly, you should use any glyphosate-based weed killer, which would allow you to plant trees after only 24 hours of using weed killer without having any harm.

How to use weed killer

Using a weed killer is quite simple. Just you have to read and follow the instructions provided on the weed killer’s pack. If you don’t use any hand sprayer or spray pack, you need to:

Use watering can  

If you use a weed killer sprinkle bar or a fine rose, it will provide you good control over where you want to apply weed killer. To avoid accidental damage of unexpected plants during the normal watering, we recommend using separate watering can.

Use pressure sprayer

Pressure sprayers are very amazing for the treatment of large areas. To know the suitable application method for your product, always read the instruction given its label. Avoid walking across the treated lawn until dry, it will save your desired plants from the transfer of chemicals onto them.

Weed by hand

There is a less effective way to remove weeds and that by hand. You can remove weeds that are close to the ground by pulling them out with roots. It is possible to remove one or two weeds, but not possible to apply for huge and deep-rooted weeds. 

You can also apply mulch to the soil surface, a thick layer of organic matter that helps suppress the weed growth. You can use the hoe blade also. But all of them are not so effective as a chemical-based weed killer.

How does weed killer work? 

Here we’ll know the types of weed killers and how do they work.

Post-emergence herbicides

Post-emergence herbicides are perfect for applying on already germinated weeds. This weed killer is more effective on those weeds that are in the early stages and didn’t produce seeds till now.

Pre-emergence herbicides

Pre-emergence herbicides are not too much available in the market. If you got this weed killer, then apply it to the perennial weeds in the fall. Perennial weeds go dormant in winter, but they store much energy into their roots in the fall. If you spray weed killer in the early fall, they could not store energy for re-emerging in the spring.

Pre-emergence herbicides are mainly used to kill broadleaf and annual grassy weeds. But the pre-emergence herbicides cannot affect already germinated weed seeds. This type of herbicide is most effective for 6-12 weeks. It is important to remember that these types of weed killer can kill grass seeds. So, don’t apply it to your lawn within 2-4 months prior of seeding and wait at least a single month after seeding to use.

Selective herbicides

A selective herbicide is one of the most common types of weed killers. It is used for killing certain species of plants. It is appropriate for large lawn areas. Usually, they don’t affect the grass but may be the cause of damage to broadleaf weeds. However, some types of selective herbicides can be the cause harm to a certain type of grass. To ensure their target weeds, checking the provided information before buying any product. Selective weed killers stimulate the growth of the weed that cannot be sustained. According to this way, weed actually grows itself to death.

 Selective herbicides normally take up to 4 to 6 weeks to kill the weeds. But it works slowly in cold weather. On the other hand, it works quicker in warm, moist soil and at the growing period of weeds. One application of this herbicide is enough for a whole season.

Non-selective herbicides

This herbicide is so much popular to kill weeds. It works on those plants that come into contact with the liquid of these pesticides. It is more effective on those weeds that are growing on hardscapes.

Contact herbicides

This type of herbicide targets the above-ground subject those come to its contact. For killing the weed population completely, repetitive doses are necessary to apply. Usually, contact herbicides are one kind of non-selective herbicides. Contact weed killers mainly work on contact with the leaves of the weeds. After Applying this weed killer to the plants, it takes little time to start working.

Sometimes, rain may the cause of the delay in starting treatments. After Applying this herbicide, the leaves turn yellow first, then it becomes brown and finally destroyed in a few days. After drying the initial application on the weed leaves, you can plant new plants or sown seeds.  For some types of trees, it can take 24 hours. Contact weed killers can be the best choice for those looking for herbicides to kill annual and perennial weeds.

Systemic herbicides

This type of weed killer is powerful and travels to the weed’s underground system and the root also. You have to apply this weed killer directly to the leaves and the above-ground part. Systemic herbicides affect the above-ground part of the weed and break them down. But they are slower than any other herbicides. This weed killer kills the weed from the inside.

When you spray it onto the leaves, they absorb it, and the liquid of the weed killer spreads out all around the weed to destroy the plant from the root. So, it can be the perfect solution for the perennial and uncontrollable weeds. It takes some time for penetrating through the leaves. If it rains within 6 hours of applying weed killer, its effectiveness will be reduced. To get the result, you should wait for a week without disturbing the lawn. Initial effects will be started within 7-10 days and get the final result within 3- 4 weeks.

Residual herbicides

Residual weed killer creates a barrier on the ground to prevent the seeds from germinating process. It also prevents weeds from getting established in the previous place. This herbicide made a barrier that stayed on the ground surface for several months and prevented the weed’s growth for a long time.

It can take up to 4 weeks to kill the weeds. However, one application of this weed killer can be enough for a whole season. But you could not dig or disturb the sprayed areas in any way to get long-lasting control.

Final Thought

We all know that weed is an obstacle in the way of gardening and weed killers are the best solution for it. But the wrong application of the weed killers can make your problem denser. So, you have to be more conscious about using herbicides. Don’t apply more herbicides on the land than the need. It may be caused by soil, air, and water pollution.

Please choose the appropriate weed killer, read and follow the user manual to apply them properly on your lawn, and get a healthy lawn. 

Happy Reading!

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