I was hoping Orchard Radar would be up and running by now, but it’s not. We do have another tool for checking different apple models to predict what is happening in the orchard. That tool is NEWA from Cornell. There are two NEWA weather sites in RI – one at TF Green Airport and one at Newport Vineyards in Middletown. It takes a little while to become comfortable with NEWA, but it’s worth the effort. NEWA can be found at http://newa.cornell.edu/
Here’s the link directly to the apple scab model: http://newa.cornell.edu/index.php?page=apple-diseases
If you find many caterpillars, it’s probably a good idea to spray insecticide again. Be sure to check apple trees closest to woods. Caterpillars can blow in from surrounding trees.