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Responsible use of Copper in agriculture

Recognized for its fungicidal and bactericidal action, Copper has been used for decades in crop protection, presenting, however, some concerns in relation to the efficacy of the fixation of the Copper ion in the exterior of the plant’s tissues and to its accumulation in the soils.

Cooper is a micronutrient essential to the plants, and it integrates the proteins that form the enzymes that regulate the activity of most of the biochemical reactions in the plants. This way it plays a crucial role in fundamental processes such as photosynthesis, respiration, the release of free radicals and the tissues’ lignification.

The maintenance of adequate Copper contents for the plants are already toxic levels for some pathogens – fungi and bacteria – so if we manage to maintain Copper at optimal levels for the plants we manage to create hostile environments for the disease causing agents, managing to minimize the attacks or making them less aggressive.

Copper does not degrade through chemical or photolytical action, but only through leaching causing, in some crops, due the existence of concentrations of Copper in the soil between 500-800 ppm, the action of mycorrhizas and beneficial bacteria of the soil to be affected.

In 2002, and in the sequence of studies of environmental evaluation of bio-accumulation in the soil, the contamination of watercourses and the toxicity in living organisms, the EU gradually restrained the maximum annual quantity of cupric compounds applicable to the crops.

In the selection of the formulation of Copper it should be noted what is the Copper content that is assimilable by the plant, because almost every conventional product (oxychloride and hydroxide) present a low suspension in water and consequently, a suspension of Copper particles with deficient covering of the plants surface.

CUPERDEM: Copper where it is needed

With the objective of quantifying the effective retention of CUPERDEM (copper gluconate) foliar applications of CUPERDEM (3 l/ha) were conducted in two distinct olive groves in Portugal in January and March of 2018.

Having passed 5, 12 and 21 days since the application, the Copper content in the previously washed leaves, to eliminate surface adhering Copper, was analyzed.

The differences between the treated trees and the control reached its maximum at 12 days after the treatment with +393% of Copper in the treated olive trees (trial 1) and with +54% of Copper in the treated olive trees (trial 2).

The obtained results show a clear effect of foliar absorption of the CUPERDEM in a gradual way throughout the days, which may serve as a barrier to the cryptogamic diseases in a period up to 3 weeks.

- click on the charts above to enlarge -

closer to the customer
Cadaval (Portugal)
The participation of producers and technicians of the West region in the conference conducted on the 9th of October highly exceeded expectations. At the time results were presented of trials conducted with ECKOSIL, KIPLANT iNmass and MYCOSHELL in vine and in orchards of Pera Rocha in the last campaign.
customer experience
CUPERDEM applied in baby-leaf and aromatic plants in the coast of Alentejo (Portugal).
The producers of vegetables and technicians are unanimous in stating the shortage of solutions for a sustainable management of the health of the crops, namely of the ones that present a short production cycle – baby-leaves and aromatics – at more climatically challenging times.
We went to hear Eng. Nuno Brissos, Farm Manager at Vitacress Portugal
“In several crops and to some diseases in our crops – leaf spot, certain leaf diseases,… - we don’t have much solutions. And some of the solutions have a very elevated safety interval.

We tried Cuperdem, as we tried several solutions and Cuperdem brought advantages in terms of efficacy. It stood out mainly in some aromatics in which we were able to reduce the application of fungicides nearly to zero.’’

“In the particular case of the crop of cilantro and of Septoria, Cuperdem is able to improve the quality of the crop, without leaving marks.

The use of Cuperdem gives us a good flexibility in the safety intervals, allowing us to make applications closer to the harvest, period in which usually more problems appear due to the higher volume of vegetation and lower aeration.’’
The ASFERTGLOBAL team wishes you a Merry Christmas and a 2019 filled with successes and achievements!
Asfertglobal South Africa
Unit 58 Zambezi Junction, Zambezi
Road Montana, Pretoria 0159 - South Africa
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