Second flight will begin at 1450 to 1500 degree day base 50. Consult Extension bulletin E-312 for insecticides registered to control European corn borer. Symptoms of late blight on tomato includes water soaking and dark lesions. These late blight lesions can also occur on plant stems, whereas alternaria and septoria would not cause the same symptoms. Anything that appears suspicious should be looked at by an agent or consultant and sent to Diagnostic services.
Late blight can spread rapidly, if left uncontrolled.
Weekly applications of Bravo will do a good job whereas Quadris is too strong against late blight on tomato. Phytophthora crown and root rot is a problem in many areas of the state in vine crops and tomatoes. This phytophthora is different than the one that causes late blight in potatoes and tomatoes. In some fields, the phytophthora has become resistant to Ridomil so that this fungicide cannot be relied on to provide disease control. We can test phytophthora in our lab to determine whether this pathogen can be controlled by the standard fungicide Ridomil.