Apples, pest control, handling.
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Every year apple growers lose a certain amount of fruit due to superficial blemishes caused by different types of insects. The injuries vary from conspicuous, corky scars to small spots and dimples. Several types of caterpillars and beetles are known to produce feed scars of various kinds, but the cause of dimpling found so frequently in Granny Smiths and, to a lesser extent, in some other varieties is still not known.
Jenkins, C. F. H.
"Insect pests and their control - Apple blemishes and their control,"
Journal of the Department of Agriculture, Western Australia, Series 3: Vol. 4
, Article 6.
Available at: https://researchlibrary.agric.wa.gov.au/journal_agriculture3/vol4/iss4/6