Black spot
Typically, a rapidly enlarging purplish or black patch appears on the upper leaf surface, with diffuse and radiating strands of the fungus sometimes just visible..Leaf tissues may turn yellow around the spots and the leaf often drops, even though other parts are as yet unaffected. At other times, the yellow colour does not appear, but infected leaves still drop.Sometimes, the spots remain relatively small and the leaf does not drop. Small, black, scabby lesions may also appear on young stems
Disease causing Species:
Diplocarpon rosae
Major Plants under threat:
Rose
Method of Application:
Foliar spray
Intervals:
For seed treatment : 5 – 10 minutes before planting. Before pest attack : once in every 15 days. Post attack: spray all over the plant once in every 4 days
Dosage:
Foliar Spray: Add 1 litre water to 5 ml ABTEC Bio Neem and spray all over the plant. Foliar Spray: Dissolve 5g bar soap in one litre water and mix thoroughly. To this solution immediately add 5 ml ABTEC Neemplex, mix well and spray all over the plant.
