Stone fruit pest problems

Asked June 22, 2015, 3:20 PM EDT

Hello,happily I have a home orchard which has just had its first crop of stone fruit growing this year. I have not used chemical or organic treatment for the trees in the interest of finding what our disease/pest problems for this area are likely to be. I also am interested in undertaking an organic system of care. Unfortunately I have found that my hardy almond, peach, apricot, and plum fruits are weeping liquid with holes bored in by some insect pest. I am interested in knowing what this pest may be, and whether treating them this season is likely to do any good at this point. I have a Surround like treatment which I may give; in the future, when should this take place? Will it do any good this year, to use it? Would it inhibit any pests which season later in the season, or inhibit the growth of larvae present? Is there another method which can better salvage some of these fruit? Are they likely to mature with larvae, or drop from the tree before hand? Thank you in advance for any information and all of your help. Appreciatively, Chris

Prince George's County Maryland

1 Response

Tree fruits can be a challenge to grow for the average homeowner. Peach (stsone fruits) and apples tend to have the most pest and disease problems and they need to be on a strict spray schedule. You will have to familiarize yourself with and manage or prevent problems. Continue to Monitor the trees throughout this growing season for any signs and/or symptoms.
No treatment is recommended this year. Some reasons for the liquid may be part of the natural ripening process or possible insects. Open up the fruit and look for this. A possibility may be the oriental fruit moth. Brown rot, a fungal disease can develop at the entrance holes. Practice good sanitation and remove all dropped fruits.
For more information see our publication and website on stone fruits. http://extension.umd.edu/sites/default/files/_images/programs/hgic/Publications/HG77_IPM_Series_Ston...
http://extension.umd.edu/growit/fruit-profiles/stone-fruits-peaches-cherries-plumsapricotsand-nectar...
There is not much research on using Surround. Please view other extension websites for more information and organic spray schedules.
http://extension.psu.edu/plants/gardening/fphg/stone
http://www2.ca.uky.edu/agc/pubs/id/id21/id21.pdf
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