Island Apple IPM
June 17, 2011
The strobies (Sovran, Flint, Pristine) control summer diseases well, but they are expensive and you are limited to a total of 4 applications per year. If you are using strobies, it is probably best to use one for your final spray for the season.
Regardless of the fungicide, you need to reapply after 2-2.5 inches
of rain. Check Orchard Radar to see when you need to reapply fungicides
to control fly speck and sooty blotch. Topsin M and the strobies will
give some kick back and control fly speck and sooty blotch - which means
these fungicides can be applied after an unprotected wet period. Orchard
Radar will tell you when you need to spray by to get effective control.
From the Apple IPM website choose the July-August Orchard Radar for either
Greenville or Newport County http://www.uri.edu/research/ipm/
Green apple aphids tend to build up in June, but these are generally adequately controlled by natural predators such as ladybugs, syrphid fly larvae and orange cecidomyid larvae. If you see aphids building, wait a week and then reassess.
Oriental fruit moth is primarily a problem in stone fruit. If you’ve found small caterpillars in your stone fruit during previous harvest, plan on using an insecticide targeting Oriental fruit moth in early July. See the pest management guide for insecticide choices. Peaches are attacked by so many insects, it is best to keep them protected with an insecticide all season long! There are many plant bugs and stink bugs as well as Oriental fruit moths.
If you run into trouble don’t hesitate to call! I can usually
stop by within a day or two of your call or email.