Vegetable Growers News posted a story highlighting the development of blight caused by Phytophthora infestans, which affects tomatoes and potatoes and which thrives under cool and wet conditions. According to the story, “Temperatures between 50 and 80 F combined with moist conditions such as rain, fog, heavy dews, or relative humidity above 90 percent are conducive for disease development. Night temperatures in the mid-fifties with daytime temperatures from the mid-fifties to mid-seventies are ideal for this disease.” Growers are advised to scout their fields carefully because it can spread quickly and decimate crops. You can read more here.

Source: Scott Bauer, USDA via Commons Wikimedia