author(s)
Jothi G and Poornima K

abstract
Experiments were conducted under green house and field conditions to test the efficacy of potassium humate for the management of root knot nematodes in tomato at the department of Nematology, Tamil Nadu Agricultural University, Coimbatore during 2015. Humic acid products are powerful fungal stimulant and biological benefits in relation to nematode management. Two grams of potassium humate per kg soil was found to be effective in reducing the gall index and nematode population. The reduction in the reproduction factor (1.93) of the nematode may be responsible for the decrease in root knot indices. All the dosage of potassium humate had a significant effect in terms of nematode reduction and yield increase (57.3%) under field conditions. In addition, the change in physical as well as the tropic structure of soil which affects the nematode development and over all plant growth performance.