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Article: Late Blight (Phytophthora infestans) Fungus of Tomatoes: Blight

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Forum: Article: Late Blight (Phytophthora infestans) Fungus of TomatoesReplies: 1, Views: 31
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Newark, DE

September 6, 2009
9:51 PM

Post #7033511

This is exactly what our tomatoes have. And I was feeling so confident about our crop- and found only one hornworm all summer. Maybe the hornworms knew something I didn't. If we throw out the remaining plants and tomatos, can we safely grow new tomatoes in the same place next year?
Mercer, PA
(Zone 5a)

September 7, 2009
10:28 PM

Post #7037629

Delaware, research I've come across says the fungus cannot overwinter in soils here in the northeast. Our winters are usually cold enough that pathogens rarely survive into spring. However, if you happen to miss an infected fruit or tuber during fall cleanup, it is possible that, given a mild winter, Phytophthora infestans will survive in the soil. My recommendation is to always rotate your crops. Do not grow tomatoes in the same area next year. That rule is not set in stone, my brother in Kentucky always adds plenty of compost and organic material to his tomato patch at the end of the season and grows tomatoes in the same spot each year without incident. But he only grows three or four plants. Good practices for planting tomatoes include soil preparation, proper spacing that allows good air circulation, staking or caging, and mulching.

Good luck.


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