Experiments with Danfoil sprayersThe effect can be documented
Following the technical development of the danfoil sprayer and spray system, the biological spray effectiveness has been tested through field experiments. The experiments have been made in different crops, with newly developed pesticides at different locations in Denmark.
Fungicide experiments in winter wheat
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A fungicide experiment in winter wheat has been carried through in west jutland, where data processing has been made by the faculty of Agricultural Sciences (DJF), Research center Borris.
The figure shows that danfoil with half dosage achieves the same yield as the conventional sprayers and with full dosage the danfoil sprayers achieves an improved result. The small droplets from the atomizer give an effective deposit of pesticides which is crucial to the results.
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Deposition of active substance in winter wheat
and potatoes
This is fully consistent with the two subsequent experiments that have analyzed the deposit of active substance in winter wheat and potatoes. Both experiments show a
significant improved deposit with Eurofoil® atomizer – especially in the middle and at the bottom of the crop. As proven earlier in this concept description the better deposition in
the crop is a direct effect of the advantage of small droplets from the Eurofoil® atomizer. Small droplets, high speed, effective deposition, and concentrate of active substance
equals more effective control and ultimately better results.
Potato blight and desiccation
On the next page, three experiments in potatoes are shown, and all provide an unambiguous answer – danfoil field sprayers works! Therefore it is with great satisfaction that
danfoil can conclude that the experimental and experience results, made through the last 20 years, supports our spray concept.
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Effective deposit
Comparison between different nozzles and Eurofoil tests from Farm test 2007 (Potatoes)
FarmTest
Experiments conducted by Agrotech in a FarmTest from 2007 confirm the advantages achieved by the droplet spectrum from a danfoil atomizer. As shown in the table on the right, the danfoil field sprayer achieves a significantly better deposit of the active substance in the crop than conventional sprayers. Therefore deposit in the top of the potato plant is better with a danfoil field sprayer and significantly better in the middle of the plant – thus a more effective spraying is achieved.
Active substance – important
Agrotech performed further tests on water sensitive paper, which was placed on the potato leaves. The following shows disposal of droplets with different types of nozzles and the danfoil atomizer. The comparison clearly shows that the danfoil atomizers small and delicate droplets cover the leave.
It is important to emphasize that when testing the deposit, it is the deposit of active ingredients which is decisive – not the amount of liquid in the crop. Therefore, it is only possible to use water sensitive paper and UV light (whitening agent is added to the spray fluid and can be traced using UV light) to determine the size of the droplets and their position in the crops.
For that reason it is not possible to test the actual deposit of active substance in the crop using water sensitive paper and UV light. This can only be tested as shown above in Agrotech’s experiment. In spite of this, the danfoil spray concept has repeatedly been discussed when comparing water sensitive paper or UV light tests in crops. It is therefore important to emphasize, that the amount of liquid on paper or in the crop does not, in itself, represent a better deposit – it is the amount of active ingredient that is crucial.
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