Knowledgebase
Treatment for apple maggots #796046
Asked June 15, 2022, 9:35 AM EDT
Hennepin County Minnesota
Expert Response
http://www.omafra.gov.on.ca/english/crops/hort/news/orchnews/2014/on-0814a7.htm
http://www.omafra.gov.on.ca/IPM/english/apples/diseases-and-disorders/blister-spot.ht
I am including other information on how to prevent other problems.
https://hortnews.extension.iastate.edu/faq/there-are-black-spots-surface-my-apples-can-i-eat-skins
Thin the apples
To balance your production for next year thin the apple trees so only one fruit for about every 6 inches of branch.When choosing which fruit to leave, look for the largest fruit. Fruit that is small or damaged should be dropped first. Thin fruit before each apple reaches the size of a dime in diameter. This usually occurs within the first 20 days after petal fall. Removing these small fruit early will keep energy available for the fruit that remain and for fruit bud development for next year.
https://extension.oregonstate.edu/gardening/berries-fruit/fruit-thinning
Enclose each apple in a plastic sandwich bag, either a zipper closure bag or a plain bag closed with staples.Snip the bottom corners off each bag with a pair of scissors to leave a small opening for water to run out.At harvest, remove the bag.
https://apps.extension.umn.edu/garden/diagnose/plant/fruit/apple/fruitspots/fruitsbs.html
https://extension.umn.edu/fruit/growing-apples
https://hort.extension.wisc.edu/articles/apple-maggot-scourge-of-home-apple-production/
https://content.ces.ncsu.edu/plum-curculio
https://www.plantwise.org/knowledgebank/datasheet/52616
We can’t tell whether a larva is present, but there might be one in the white spot seen here:
https://images.app.goo.gl/qLU9boGccmQvuMtH8
https://www2.ipm.ucanr.edu/agriculture/apple/Codling-moth/
Coddling moth larva (Cydia pomonella) and Apple maggot (Rhagoletis pomonella) are prevented with esfenvalerate, carbaryl and spinosad. Once the larvae enter the apples, they are protected
https://extension.umn.edu/yard-and-garden-insects/apple-maggot https://dl.icdst.org/pdfs/files/5d3bf0ca358f83df12d2c617e9d7883c.pdf https://extension.umn.edu/yard-and-garden-insects/codling-moths