Success with Scab Infections that occurred during primary scab season are showing now as leaf lesions, but the good news is that most commercial orchards came through a very tricky primary season with extreme scab pressure very well.
Unsprayed trees are full of scab.
Many have reported that Flint has performed well. A somewhat early and relatively wet Spring has contributed to flyspeck development. While we mostly agree with this scenario, we feel that the importance and impact of the primary inoculum may be underestimated and that a spray with a material like captan or Flint about three to four weeks after petal fall, especially in the 3 or 4 rows of apples adjacent to woods or hedgerows may reduce the potential for a flyspeck problem later in the summer. This could be combined with the last curculio spray or could come after that. One outcome of the study will be to develop a condensed, user-friendly survey for growers and scouts to use.