Need help with deficiency or pests

[tonymontana]

Hi, im growing outside and i have problems, first it started only on 1 plant now it's spreading to others,

 

[tonymontana]

Other pics

 

[oldbootz]

Looks like they need some epsom salts

 

[BakedBandit]

Get a scope. 60x mag at least. Check for bugs

 

[tonymontana]

If you noticed on the top leaf's are drying out

 

[oldbootz]

could be burn did you add any liquid nutrients?