Posted on 20 July 2009 by tomatocasual.com
By Vanessa Richins
In 1845, Ireland was hit with late blight (caused by Phytophthora infestans), which killed much of the potato crops.
Since this was their main crop, a famine grew in the country.
It lasted for the next 6 years.
In the end, it is believed that about 1.5 million people died from starvation and 1 million people went to other countries.
Since tomatoes are in the same family (Solanaceae) as potatoes. it can also be affected by late blight.
2009 thus far has been one of the rainiest years in a while. The wet, cool conditions are perfect for the development of a fungus like Phytophthora infestans. This year
In the Northeast (from Ohio to Maine), reports have come in that plants Read the rest of this entry »
Posted on 14 June 2008 by tomatocasual.com
By Michael Nolan
Looks like: Darkened spots on the older leaves, with rings. The area around the spot will often turn yellow.
Treatment: The fungus that causes Early Blight can survive through the coldest of winter months in the soil. The only way to avoid Early Blight is to completely remove any affected plants and clean all of the garden debris in the area. Some experts say that copper or sulfur spray will stop the fungus from spreading.
Looks like: Late Blight is what caused the infamous Irish Potato famine. It presents as a gray spot on the leaves that looks almost like a grease spatter, and will often be surrounded by white mold – especially in wet weather.
Treatment: This fungus is Read the rest of this entry »