Photos of the week: Gray leaf spot hits overseed

Just when you thought you it was cool and dry enough to overseed without concern for gray leaf spot, unexpected warm and humid conditions can turn the tables and result in disaster. In this Southern California situation, unusually warm conditions following overseeding led to an epidemic of gray leaf spot that was difficult to control. Even though conditions began to cool and the gray leaf spot threat began to drop, the damage had been done. Application of Heritage (azoxystrobin, a…