Plant pest defence research. Researcher applying a plant hormone precursor to a potato (Solanum sp. ) plant in order to induce chemical defences against insects. Photographed at the Agricultural Research Service's (ARS) Fruit and Vegetable Insect Research Unit,Wapato,Washington,USA | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Greb, Peggy / US Department of Agriculture |
Bildgröße: | 3362 px × 5220 px |
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