Effect of herbicide tank-mixes on weed control, yield and physiological parameters of soybean (Glycine max) under tilled and no-tilled conditions
Tóm tắt
The effect of pre-emergence herbicide tank-mixes was evaluated under tillage and no-tillage (NT) conditions for weed control, yield and physiological parameters in soybean [Glycine max (L.) Merrill]. Out of the eight weed control treatments, the herbicide mixture pendimethalin + imazethapyr was found superior. Results indicated that weed density in NT treatment was significantly lower than conventional tillage but weed dry matter, leaf soluble protein, chlorophyll content and yield were not affected by tillage treatments. Pendimethalin tank-mix with imazethapyr was more effective against weed than pendimethalin alone. Leaf soluble protein in pendimethalin was significantly higher than weed-free check, while lower value was observed in metribuzin 0.3 kg/ha + imazethapyr 0.075 kg/ha. All weed control treatments gave significantly higher soybean seed yield compared to weedy check, but pendimethalin + imazethapyr was comparable with weed-free check and was superior to all other weed control treatments.
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