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Aug 27, Assuming the pine tree doesn’t get an adequate amount of water, the brown needles will die and fall off. Fungal Disease Can Also Cause Pine Trees to Shed Their Needles. A fungal infection can cause pine trees to shed their needles as well. Dothistroma, for example, is a fungus responsible for needle blight. When the needle blight-causing fungus infects a pine tree, the needles will die and fall Reviews: 2.

The culprit is probably some type of disease or insect. So, if one-third to one-fourth of the needles on the inner parts of your evergreen tree are falling off, it is probably just a normal sign of aging. Just rake up the dead needles, or better yet, leave them under the tree for a good mulch. Apr 05, Do Pine Needles Fall All Year Round? Pine needles typically drop only in late summer/fall.

A pine that is losing needles in winter, spring, or summer may be diseased. Firs and spruce trees lose a small percentage of needles year-round.

Jun 18, This soil-borne fungus tends to infect pine trees, harming or killing them in the process. Although this fungus lives in the soil, the symptoms are presented on the above-ground portions.

Signs of an infection include reduced growth, reddening or browning needles, dying branches, falling needles and eventually, bushfelling.barted Reading Time: 3 mins.