I hope this helps

"Manganese(MN)
-immobile

Deficiency: Young leaves yellow between veins and veins remain green. Symptoms spread through older leaves. Dead spots develope on severely affected leaves before they fall off. Plant is stunted and maturation is prolonged. Severe deficiency looks like a severe lack of magnesium.

Toxicity
Young and newer growth developes chlorotic dark orange to dark rusty brown molting, first on young leaves then progressing to older leaves. Slow growth and loss of vigor. Toxicity is compounded by low humidity. The additional transpiration causes more Mn to be drwn into foliage. excess Mn causes deficiency of Fe and Zn."

I'll be back to post more tommorrow it's late here, 'night.

May also be Phosporus toxicity too or Potassium