News Pricer.lt

How to properly mix plant protection products with boron?

Jak prawidłowo mieszać środki ochrony roślin z borem?

Beware of uncontrolled reactions in the tank mixture

A characteristic feature of protective treatments in rapeseed is that they are often quite complex. Since the protection deadlines overlap, it can often perform several protective activities in one pass – both combating diseases and pests, and sometimes even weeds. We can also provide foliar feeding.

If we also take into account that individual protective functions are based on different substances, and fungicides and insecticides are based on multi-component solutions, then we get a protective combo that is highly recommendable from a practical point of view. But on the other hand, there is a certain risk – namely, a large number of components enter into different reactions with each other, which increases the risk of lack of control over the prepared working fluid.

In this context, the order in which the individual components of the mixture are added is important in order to limit any adverse reactions to a minimum.

What treatments should be used in the 4-6 leaf phase of rapeseed?

Read more

What treatments should be used in the 4-6 leaf phase of rapeseed?

Water is the main carrier – its quality is the basis

At the very beginning we start conditioning the water. It is the main carrier and one can even go so far as to say that more depends on it than on the added agents themselves. We will explain why.

Even the most effective substances against a given pathogen cannot work if the working fluid has too high or too low pH.

In extreme cases, their effectiveness is almost completely reduced because, among other things, they do not fully dissolve. In the case of insecticides, the pH is often in the range of 4.5 – 6, and for fungicides 5 – 6.5 (although there are also some differences in these groups).

In general, however, in most cases this is the optimal pH for these substances. Considering that the insecticide and fungicide are used together, the pH should be in the range of 5 – 6.

By conditioning water we also contribute to other beneficial effects in the context of the quality of the working fluid, namely we reduce water hardness and, consequently, surface tension.

A droplet in contact with the sprayed surface should be evenly distributed over it. If the surface tension is too high, it will instead bounce off the leaf blade, and the consequence is poorer coverage and less delivered agent from the protected plant.

Biological crop protection and integrated plant production using the biofungicide Polygreen WP

Read more

Biological crop protection and integrated plant production using the biofungicide Polygreen WP

Boron must be handled with care in mixtures.

In autumn protective combinations in rapeseed, boron appears very often. If not used with caution, it can cause quite a stir. First of all, boron is given zero-one – i.e. either at the beginning of the mixture or at its very end.

There are no other combinations, we never add it in the middle of creating a "mixture". Bulk products in the form of boric acid are added at the very beginning. They lower the pH of the working fluid. On the other hand, boroethyleneanines (in liquid form) are added at the end. They increase the pH of the working fluid. Similarly to products based on sodium borate (except that these also come in bulk form). However, borate increases the pH minimally, and boroethyleneanines significantly. This is important in the context of the pH of the working fluid, which we mentioned at the beginning.

High doses of pH-raising products at the very beginning of preparing the mixture may cause insecticides and fungicides added later to be unable to work (and sometimes even dissolve well).

In what doses and when should rapeseed be regulated?

Read more

In what doses and when should rapeseed be regulated?

Tank mixture at your own risk

So we always condition the water first. We apply boron either at the beginning or at the very end, depending on the product form. Special attention should be paid to the combined use of boron with CS-formulated insecticides.

If these are given after adding boron in liquid form, a precipitate will form. However, if the correct order is followed, nothing bad should happen to the mixture.

If we also use urea or magnesium sulphate, these fertilizers should be added before mixing the plant protection products, immediately after conditioning the water.

Similarly, before PPP, we add other loose foliar fertilizers. The adjuvant, if used (apart from the water conditioner), is given at the end.

Generally, when deciding on a mixture of several preparations (fungicides, insecticides, growth regulators, foliar feeding, graminicides), one rule should always be followed: we can only make such a mix if the application dates are consistent for all components of the mixture. If it is made with caution, i.e. in accordance with all recommendations, the treatment will not only be effective, but will also allow for complementary protection in one pass.

Please remember that we always prepare the tank mixture at our own risk.

News source

Dalintis:
0 0 balsai
Straipsnio vertinimas
guest
0 Komentarai
Seniausi
Naujausi Daugiausiai įvertinti
Inline Feedbacks
Rodyti visus komentarus

Taip pat skaitykite: