Selective herbicides vs. Non-selective herbicides

Before carrying out or authorizing the application of any herbicide on your property it is important to be aware of the difference between a selective herbicide and a non-selective herbicide.

Differences between a selective herbicide and a non-selective herbicide

Non-selective herbicides are able to remove all vegetation that actively grows, either by contact or through a systemic method of action (chemical transport through the plant). An example of this is the RoundUpwhich is often used to kill all unwanted weedsthat grows on the ground before planting desirable seeds or already developed plants. Residual weed control (soil sterilants, pre-emergent herbicides, etc.) should be taken into account when selecting the non-selective herbicide ideal for a specific area-specific vegetation control task.

A selective herbicide has the ability to remove certain plants in specific (product labels include that specification), leaving the other plants virtually unharmed (depending on the dosage and application time). Particularly, almost all the selective herbicides applied on the grass are of systemic origin (chemical transport through the plant).

Selective herbicides destroy weeds or specific plants that are not desired, without affecting cultivation plants. That is why these herbicides can be applied in areas of mixed growth, such as the control of broad-leaved weeds in fine grass.

 

Action of selective herbicides (see here)

To treat weeds certain strategies can be carried out that prevent its growth, however, these can be very hard and that is where the selective herbicides come into action. These are usually the last line of defense.

Selective herbicides can work in different forms, however, in most cases, the active ingredients enter through the cuticle of the plant and are transported within the weed to their areas of activity where they must carry out an action which impedes growth. Plants that are resistant do not get intoxicated with the herbicide since they do not absorb it.

It is really important to take into account the dosage and the correct type of application because this will allow the action against weeds to be directed only against them.

Selective herbicides can be applied to check for bad grasses such as:

  • Big plantain
  • Ear of cat
  • Minor plantain
  • Hoary banana
  • Banana of the sea
  • Ribwort banana
  • Daisy flower
  • Ranunculus Buttercup
  • Hawk
  • Dandelion
  • White Clover
  • Clover bird’s foot
  • Self healing
  • Common Mouse-ear
  • Smaller clover
  • Pearlwort
  • Yarrow

 

The decision based on the application of a selective herbicide should be made taking into account if it is necessary to eliminate only a group of unwanted broadleaf herbs, herbs, vineyards, among others; Or if everything that grows in a specific space must be controlled only.

No matter what the case, it is advisable to consult an industry professional to correctly identify the target plant and which are the best control options available (organic, contact, synthetic, dosage, systemic, cultural, mechanical , Among others) before proceeding to spray all pesticide applications.

 

Selective vs. Non-selective

Now, you have reached the point where it is necessary to know what will be the herbicide that adapts better to the need for your cultivation.

At this point it is not a question of whether one is better than another or if it is more effective or better applied. The truth is that both types of herbicides are applied in different crop situations to treat a specific case.

As an example, if you need to get rid of a broadleaf weed group from your cultivation, ideally you should apply a selective herbicide. These are generally applied only in cases of crop emergency in order to eliminate weeds and not affect the cultivation. Where you have made the application of a selective herbicide, there will be destroyed the type of weed for which this product was designed.

Now, if you want to do away with the weeds that have grown in a nearby land to be used for a crop, it is necessary to apply the non-selective herbicide. Similarly, if you need to destroy a vegetation that has been born in cracks or a portion of scrub of a bed of flowers.

We advise that if you are not familiar with this type of chemicals to treat cultivation to a consultant experienced in terms of herbicides to cultivation, since he can guide you in the decision to take. Keep in mind also that you must mention with detail and precision the type of plant you want to eliminate and where it is located.

It is necessary to make a point about this since there have been a lot of cases in which a cultivation owner, ignoring these aspects of the herbicides, has finished with its cultivation and lost its harvest when applying a non-selective herbicide. Similarly, there are a number of cases in which other cultivation owners have attempted to break down different types of weeds applying a selective herbicide.