target leaf spot disease on cucumber. cucumber plant affected by diseases in garden or greenhouse

biotechnology blight cucumber cucumbers disease diseased engineer engineering farmer farming fungal fungicide fungus genetically greenhouse herbicide infection infestans infestation insect inspector leaf leaves microbiology mildew modified mold pathogen pathology peronosporoz pest pests phytophthora plant plasmopara problem pseudoperonospora research researcher resistant science scientist sick spot spots technician technology vegetable vegetables vegetation virus