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Research into the persistence and residue dynamics of metalaxyl in tomatoes in hydroponic culture with recirculating nutrient solution (NFT)



Research into the persistence and residue dynamics of metalaxyl in tomatoes in hydroponic culture with recirculating nutrient solution (NFT)



Nachrichtenblatt fur den Pflanzenschutz in der DDR 42(9): 173-176



Phytophthora nicotianae var. nicotianae infection of tomatoes in hydroponic culture was effectively controlled by 4 mg metalaxyl/litre nutrient solution. Preventive treatment provided a long lasting effect (at least 63 d). Metalaxyl concn declined continuously in the nutrient solution. During the first few days after treatment, residue concn in tomato plants were up to 2.5 mg/kg; after 7 d, residue concn in tomato fruits were 0.05 mg/kg, this level declining to 0.025 mg/kg after 2 weeks.

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