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Odd growths on apple tree bark won’t affect growth
North Dakota State University experts say corky growths on apple trunks caused by plastic wrap are harmless hypertrophied lenticels and will not affect tree health.
- After removing summer plastic wraps, the apple tree trunk showed almond-sized corky growths only where plastic trunk wrap and sticky material had covered it.
- The explanation traces the growths to lenticel response to low oxygen, as plastic wrap reduced gas exchange and caused hypertrophied lenticels to enlarge.
- NDSU Extension provided the diagnosis as North Dakota State University Extension Forester Joe Zeleznik examined the case and offered Don Kinzler, NDSU Extension-Cass County, as a contact for gardening questions.
- The immediate impact is cosmetic, and no remedial steps are required; the apple tree’s bark should continue normal growth, according to NDSU Extension guidance and Joe Zeleznik.
- Gardeners who use trunk wraps or sticky traps should note the flooding analogy, as wrapped trunks create low-oxygen pockets that enlarge lenticels and cause cosmetic corky growths.
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16 Articles
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Total News Sources16
Leaning Left0Leaning Right10Center2Last UpdatedBias Distribution83% Right
Bias Distribution
- 83% of the sources lean Right
83% Right
C 17%
R 83%
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