Biology and Use Pattern

Diflufenican was introduced by May Baker Ltd. (now Bayer CropScience). It is applied at 125-250 g ha pre- or early post-emergence in autumn sown wheat and barley for the control of broad-leaved weeds. Degradation proceeds via the metabolites 2-(3-trifluormethylphenoxy)nicotinamide and 2-(3-trifluormethylphenoxy)nicotinic acid to bound residues and CO2. DT50 varies from 15 to 30 weeks, depending on soil type and water content. 

Fluorochloridone was introduced by Stauffer Chemical Co. (now Syngenta AG). Rights were acquired by Agan Chemical Manufacturers Ltd. in 2002. It is applied pre-emergence at 250-750 g ha for the control of weeds in winter wheat and winter rye, sunflowers and potatoes. It degrades in the soil under laboratory conditions, mostly forming CO2 and a bound residue. DT50 in the field is 9-70 days. 

Flurtamone was introduced by Chevron Chemical Co. and later acquired by Rhone-Poulenc Agrochemical (now Bayer CropScience). It is incorporated preplant, pre-emergence or applied post-emergence for the control of broadleaved and some grass weeds in small grains, peanuts, cotton, peas and sunflowers at 250-375 g ha . The main metabolite is trifluoromethylbenzoic add and, 10 months after application, no residues could be detected. Field DT50 46-65 days. 

Beflubutamid is under development by Ube Industries Ltd. Its intended use is alone or in mixture with isoproturon for pre- and early post-emergence control of broad-leaved weeds in wheat and barley at 170-255 g ha h Soil DT50 5.4 days the main metabolite is the corresponding butanoic acid, which itself is rapidly degraded in soil. 

250-375 Pre, post Cereals, peanuts, peas, cotton, sunflowers 

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