Treating Needlecast Diseases In Evergreens

Needle cast diseases occur when different fungi infect the new needles on pines, spruce, Douglas fir, and true fir. The needles become infected. The symptoms of needlecast disease are not always noticeable until the following winter or spring season. It is common to see yellowing or browning of the needles, with characteristic dark fungal fruiting structures. The infected interior needles are shed early leaving the tree with a sparse, thin appearance. The remaining needles are the current season's new growth. According to studies from Penn State University, "we have a lot to learn about when these fungi attack a tree", How long the fungus must be in the tree before needles are shed. When is the best time to apply a fungicide? Which chemicals provide the best protection. The good news is that there is progress being made in these areas. With the help of tree care specialists, like professionals...

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