So a few weeks ago I noticed one of my reaper plants started to show some yellowing and downward curling of its leaves, mainly on the older growth, in between the veins (no photo sorry). I gave it a hit of calmag hoping this would sort it out, but it has only got worst. Maybe some sort of insect rather than a nutrient deficiency? All my other plants are ok, they are all in pots, and the rest of the plant is very healthy with pods.
Leaf issue

Rest of the plant

Leaf issue

Rest of the plant
