Researchers do not yet agree on the cause of the purple leaves in broiler.

THE EFFECT OF THIS DISEASE ON PERFORMANCE HAS NOT YET BEEN DETERMINED.

Tomato producers have been diagnosing purple leaves on the plant as a phosphorus deficiency., nitrogen or potassium. It is also usually attributed to some illness or stress.. However, for three years, Analysis carried out on more than five hundred samples has revealed that it is not a product of nutritional deficiencies..

Like this, it has been possible to conclude, according to research carried out, which is due to a purple leaf disorder in tomato (TPLD). To distinguish between TPLD and a nutrient deficiency, The researchers observed that the phosphorus deficit is seen in the lower part of the leaf surface, causing its veins to turn purple and end up spreading to the rest of the leaf.

As for TLPD, it only develops on the portion of the leaf surface that is exposed to the sun., keeping the shaded leaves in their natural green color. The effect of this disease on performance has not yet been determined..

The latest studies suggest that TPLD is caused by a virus similar to the chlorosis type transmitted by whiteflies.. But these studies still do not conclude whether the virus is the cause of TPLD or if it is only part of the cause..