EFFECT OF NITROGENOUS FERTILIZERS ON DISEASE INTENSITY OF DOWNY MILDEW, AND IT'S RELATION TO YIELD CHARACTERS IN OPIUM POPPY CROP

摘要

The disease intensity of downy mildew, yield of opium and morphine, and morphine strength in opium poppy crop have been studied under the influence of nitrogenous fertilizers such as urea, ammonium sulphate and ammonium sulphate nitrate at 50 kg and 100 kg N ha~(-1) levels. No definite relation between disease intensity and yield characteristics had been obtained, though the yield of opium and morphine increased with the increase in the nitrogen input.