Plants should be destroyed to that no infected plant matter remains in your garden, on your soil, or in your compost heap. It affects both tomatoes and potates (Irish potato famine!). It spreads easily on the wind through spores and can travel quite a ways to settle on your plants. Technically speaking, Late blight is a fungus, Phytophthora infestans, to be exact. This means one plant will most likely turn to 2, which turns to 3, and so on and so on. Late Blight, however, will take down the entire plant- and it is highly contagious and spreads easy. Most will cause a reduction of harvest, but not affect the entire crop. ![]() Late blight is not like other diseases that strike your garden. I wouldn’t wish that on any gardener! So what can you do to prevent late blight from destroying your garden? First let’s talk about what it is and how to spot it. We were lucky to get a few early tomatoes first, but all hopes of canned sauce were gone. We started spraying the remaining tomatoes with an organic copper fungicide. We dug up all the plants we could find with signs. I knew what it was, but I snapped some pictures and sent them to my husband and sat down to Google. I walked the garden and found more plants along the row- with blackened stems and even some of the fruits had a bruised look about it. It started as black spots on the leaves and fuzzy white growth on the underside. They were growing, heavy with green fruits and so close to turning red. I spent even more hours pinching off suckers and winding twine around the plants to tie them to their stakes. ![]() Please see my disclosure page for more information about cookies collected and our privacy policy. If you make a purchase using one of these links, I may earn a commission.
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