▁v ine yard ▁so ils . ▁While ▁the ▁gra pe ▁has ▁some ▁resistance ▁to ▁down y ▁and ▁pow der y ▁mil de w , ▁it ▁is ▁very ▁sus cept ible ▁to ▁the ▁vit icult ural ▁ha z ards ▁of ▁bot ry tis ▁bunch ▁rot . ▁ ▁W ines ▁According ▁to ▁Master ▁of ▁W ine ▁Jan cis ▁Robinson , ▁M anto ▁negro ▁tends ▁to ▁produce ▁light ly ▁colored , ▁soft , ▁light ▁bod ied ▁red ▁w ines ▁that ▁are ▁often ▁high ▁in ▁alco hol . ▁In ▁Mall or ca , ▁the ▁gra pe ▁is ▁often ▁bl ended ▁with ▁lower - al co hol ▁and ▁more ▁struct ured ▁vari eties ▁such ▁as ▁Cal let ▁though ▁in ▁DO s ▁such ▁as ▁Bin iss alem - M all or ca , ▁M anto ▁negro ▁still ▁must ▁account ▁for ▁at ▁least ▁ 3 0 % ▁of ▁the ▁final ▁wine ▁bl end . ▁ ▁The ▁age ▁of ▁the ▁v ine ▁has ▁a ▁distinct ▁influence ▁on ▁the ▁resulting ▁flav or ▁profile ▁and ▁quality ▁of ▁the ▁w ines ▁produced ▁by ▁M anto ▁negro ▁with ▁younger ▁v ines ▁t ending ▁to ▁produce ▁l ighter , ▁more ▁red - f ruit ▁flav ors ▁while ▁older ▁v ines ▁( which ▁also ▁tends ▁to ▁naturally ▁produce ▁lower ▁yields ) ▁more ▁often ▁produced ▁more ▁concentr ated ▁dark ▁fruit ▁flav ors . ▁ ▁During ▁win em aking , ▁M anto ▁negro ▁respond s ▁well ▁to ▁o ak ▁treatment ▁but ▁can ▁be ▁pr one ▁to ▁ox id ation . ▁W ines ▁made ▁from ▁the ▁gra pe ▁are ▁often