Hi. I'm trying to grow tomato plants. My beefsteak tomato was looking good until i noticed today some leaves are looking curled. When i looked closer i saw some leaves had brown rimmed 'veiny' holes. I've attached a photo. Can you please tell me what might be causing this and what I can do about it?
This looks like insect damage, not disease. To me, it looks like several egg masses hatched. I would check other leaves, probably the underside, and knock off any tiny eggs. Overall, the plant looks healthy. Some insect damage is inevitable, in my book.