Abstract：The effect of rotten and fresh wheat chaff on controlling cucumber root-knot nematode and plant growth were investigated in plots and pot,respectively.The control effect of 2 % rotten wheat chaff mixed with soil,poured root with 1.8 % abamectin EC 3 000 times liquid diluent were 54.86 % and 54.09 % in pot.The result in plots experiment showed that furrow application 400 g·m-2 rotten wheat chaff,poured root with 1.8 % abamectin EC 3 000 times liquid diluent,furrow application 200 g·m-2 rotten wheat chaff and 400 g·m-2 fresh wheat chaff have prominent control effects on root-knot nematode.They were 78.60 %,73.53 %,68.47 % and 68.47 %,respectively.All kinds of treatment could promote cucumber plant growth,but furrow application 400 g·m-2 rotten wheat chaff had the best result.Further study showed that the control effect of 200 g·m-2 rotten wheat chaff mixed with rotten beanstalk and 200 g·m-2 rotten wheat chaff mixed with rotten peanut husk by furrow application were 55.91 %,53.76 % and 56.99 %,respectively.It was similar to the effect of furrow application 400 g·m-2 rotten wheat chaff.
