Preparation of nematicides formulation from Achillea wilhelmsii for controlling root knot nematodes (Meloidogyne incognita)

Foliage of Achillea wilhelmsii C. Koch. were dried in the shade and room temperature (about 25°C), powdered and extraction was done in the Soxhlet extractor. Water soluble and non-water soluble components of the extract were separated by Dichloromethane/water. In addition, Tween 85 was added to the extract and EC formulation of 5% was made. Results of the laboratory experiments showed good stability of the formulation. The toxicity of formulation to the root-knot nematode, Meloidogyne incognita, was studied in laboratory and pot experiments. Application rates of formulation were 0.125, 0.25, 0.5, 1, 2, 4, 8 and 16 percent for the laboratory experiment in order to determine their effects on motility and mortality of second-stage juveniles (J2) after 24 and 48 h. In pot experiment, 0.125, 0.25, 0.5, 1, 2 and 4 percent of the formulation were applied on nematode activity and plant growth components of tomato (Solanum lycopersicum). Exposure time was significantly (p