44+ Pine Tree Needles Turning Yellow In Spring. Spruce needle rust is a fungal disease that attacks the current year's growth. For some species such as white pine and scots pine, yellowing of older needles is a natural occurrence.
The mature needles are turned brown by the summer sun, and fall from the the telecote or mexican yellow pine (pinus patula), has needles that are up to 12 inches, and grows in mexico.
Because a number of factors cause the needles to turn yellow, you need to diagnose the cause of the discoloration before treating the problem and adopting strategies to. Well that depends on the pine, one of the key identifiers for pine trees is the bundle of needles, 2, 3 or 5. Yellowing needles on evergreens such as pine trees cause concern and warrant immediate control to prevent spread and retain health. Most trees that discolor in winter recover a more normal green color in the spring.