In a liter Water Mix 20 to 50 ml neem Oil,and Spray to the Plants.If the Infection is Severe repeat the Spray once or twice at a weeks interval.
I have used this for my plants which were infected with some white fungus .After first spray my plants were looking very fresh.
Good effect on plants
Both products are excellent. Spray is of good quality & sturdy. Easy to operate. The neem oil is also effective. My all plants were infected with white disease on leaves. I applied neem oil mixed with water for consecutive three days & all disappeared. Effective without foul odour like other pesticides & being natural safe also.