| abstract |
In a testing system for chemical substances or substance mixtures, especially for potential plant protection compositions, the chemical substance to be tested or the substance mixture to be tested is applied to a test specimen, especially to plants or parts of plants. When a predetermined period of time has elapsed, the test specimen is examined for the activity of the substance or substance mixture. For this purpose, first of all a type of test specimen is selected from a stock of test specimens, and the substances to be tested are selected from a stock of substances to be tested. The selected type of test specimen and the selected substances are identified (BC 1 , BC 2 ) with a machine-readable code and those codes are supplied to a memory unit ( 12 ). The test specimens are placed in readiness in a carrier plate ( 30 ), for which purpose each test specimen or a section (BR) of test specimen is deposited in a well ( 300 ) that is provided in the carrier plate ( 30 ) and that is partly filled with a nutrient solution ( 301 ). Then a spraying device ( 150, 151 ) is inserted into the well ( 300 ) of the carrier plate ( 30 ) and sprays the test specimen deposited therein with the selected substance and is then removed from the well ( 300 ) again or the spraying device is positioned immediately above the well ( 300 ) of the carrier plate ( 30 ) and sprays the test specimen deposited therein with the selected substance. |