When plants are six weeks and then sprayed with a water-soluble Artemisia oil refinery. 2,4,6% (V / V) (use distilled water as a control).
Using a sprayer in the ratio of 100 ml / m2 Total 20 potted pot randomly 4-5.
1-7 days after spraying look chlorotic to necrotic skin pale and dead plants percentage. Then measure the amount of waste from the pores of chlorophyll.