препараты по защите растений(To protect crops from damage and to increase yields, farmers use crop protection agents. There are herbicides (against weeds), insecticides (against insects pests), and fungicides (against fungal attack). Alexander Demidov)
средства защиты растений(Crop protection agents are defined as chemical or biological substances which protect plants from diseases (e.g. fungicides), animal pests (e. g. insecticides) ... Alexander Demidov)