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Browning Hemlock

Kenzen

Kenzen

ArboristSite Lurker
Joined
Jun 28, 2009
Messages
32
Age
65
Location
Knoxville, TN
Am getting ready to see a friend's hemlock I treated several years ago (5) for HWA and now he wants me to look at the tree due to it turning brown in the interior but with new growth on the ends. Could be anything from natural needle loss to Phytophthora since they have had issues with drainage on some other plants. So anything else I need to look at? I will take some pics if I am unable to diagnosis the issue. I usually do not have to treat any hemlocks beside for HWA.
 
Raintree

Raintree

Penguins are tasty
Joined
Jun 3, 2012
Messages
3,276
Location
TN
Not much info to go on here. Look for...
Properly planted
Shady site or full sun
Poor drainage = low oxygen
Soil fertility
Scale
Size of new growth
Color of last years needles

I would guess normal needle loss.
 
NIP Group
Kenzen

Kenzen

ArboristSite Lurker
Joined
Jun 28, 2009
Messages
32
Age
65
Location
Knoxville, TN
Yes five years ago. Have not seen the tree in a while, but I believe needle loss. Still they have planted trees to close to concrete driveways, overcrowd plants, have some drainage issues, and all of that will be looked at. I did show them what to look for for HWA. And have had luck with imidacloprid lasting up to 7 years in healthy trees so will look at treating them again. I will get back with you later
 
Kenzen

Kenzen

ArboristSite Lurker
Joined
Jun 28, 2009
Messages
32
Age
65
Location
Knoxville, TN
He did contact me after asking him to get a better idea and said that their are healthy needles on the interior then brown needles then healthy new needles. So I'll have to look at it no matter what his description is, take some samples and take home to look at under hand lens.
 
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