Foliar nutrient analysis – It is the time in the growing season to collect leaf samples for analysis. Samples are usually collected between July 15 – Aug. 15. The UVM Agriculture and Environmental Testing Lab can provide analysis, but at this time their output does not generate fertility recommendations. The following are potential options of labs for analysis. It is recommended that you contact the lab for instructions and costs before samples are sent. Plus, it is important to confirm that they will send recommendations along with the analysis.
(1) University of Maine Analytical Lab: http://anlab.umesci.maine.edu/
(2) Agro One: https://dairyone.com/services/forage-laboratory-services/plant-tissue-analysis/
Wrapping up spraying – Primary insects of concern are apple maggot and codling moth. Both should be managed in high-pressure orchards. AM can often be managed with a single insecticide application based on monitoring with red sticky traps. The threshold is two flies per unbaited trap, or five flies per trap if apple volatile baits are used. Codling moth are between flights in most orchards, so management is advised later this month if this pest is a problem for you. Insecticide options are listed in the New England Tree Fruit Management Guide. Dr. Arthur Agnello discussed these summer insect pests in more detail in the July 7, 2014 issue of Scaffolds .
Summer diseases – It is important to maintain fungicide coverage to protect against sooty blotch, fly speck, and summer fruit rots. Materials should be applied after every 200 accumulated hours of leaf wetness or 2 inches of rainfall, whichever occurs first. Given the rain we’ve just come out of, I’d suggest that most orchards, except those managed for cider or other processing, receive a treatment as soon as is reasonable.
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