i have a lot of potted tomatoes on my rooftop patio in seoul, korea. they have been bearing loads of fruit and were healthy until about a week ago.

then the leaves began to become bleached of their vibrant green, yellow spots appeared, whole branches began drying up and falling off. i chalked it up to "post-partum" stress cos they've been bearing so much fruit but now i noticed that one of them has colonies of tiny bugs in silk tents under the leaves. they look like spider mites. my whole tomato crop is in acute distress! does anyone have any idea what they are?