Performance of Cowpea and Soybean in Nigeriasâ€™ Sudan Savanna as Influenced by Pendimethalin Application Rates
Field experiment was conducted at Gombe during the 2012 wet cropping season situated at Lat.110 30II N and Long.100 20II E at an altitude of 240m above sea level to evaluate the performance of two leguminous crops (cowpea & soybean)under different rates of Pendimethalin in the sudan savannah zone of Nigeria. The experiment consisted of six different rates of Pendimethalin (1.0, 2.0, 3.0, 4.0, 5.0, 6.0kg a.i.ha-1) + weed free and weedy check (controls) making a total of eight possible treatments which was laid in a split plot design and replicated three times. Results indicates that high rate of Pendimethalin resulted in an increase to days to 50% emergence, injury score (phytotoxicity), decrease in plant height as well as number of leaves of respective crops (P=0.05). However, the same higher rates resulted in maximum decrease in weed cover score, weed dry weight, number of pod plant-1 and eventually the final yield of both cowpea and soybean respectively.
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