If you want to believe that this is a cosmic mystery.
Needles will stay on a spruce tree for years before dropping, typically from the inside of the tree and on older branches. Environmental factors can influence this cycle as well; for example, a tree that is under stress from things like drought, soil compaction or excessive moisture will enhance needle treecutter.barted Reading Time: 3 mins.
Sudden needle drop (SNEED) is a newly discovered needle drop disease of spruce found in both Missouri and Illinois. It is probably caused by the fungal pathogen Setomelanomma holmii. Symptoms are yellowing and eventual browning of older needles (top image). By autumn all needles on affected branches have dropped off except the needles on the tips of the branches.
Affected branches may be scattered throughout the tree or include the entire treecutter.bar Size: 1MB. Jun 03, There are different kinds of spider mites. The type that bothers spruce trees come in a variety of colors (black, green, pink). They usually go after the inner needles on your tree. Signs of their presence are yellowing needles and/or tiny spider webs. They are most active in the cool temperatures of spring or fall.
To kill them, spray with a treecutter.barted Reading Time: 4 mins. Jan 31, Two weeks ago I noticed a neighbor's Norway spruce showed the same tip loss. Last night's wind blew down many more, and now I'm concerned for my tree's health.
This is not rodent damage, as the tips are falling freely.
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All the needles are still green, so there's no browning or. Jun 28, Spruce spider mites cause needle discoloration and eventually kill needles, which can be mistaken for a needlecast disease (Photo 7). Technically, mites are not insects, but are related to spiders.
This distinction is important since not all insecticides will control mites.