Oregon Forestry Pesticide Applicator Practice Exam

Winter injury shows up as damage across multiple parts of the tree caused by cold stress, not just one tissue. The description here fits that pattern: needles have a red-brown cast and current-year needles show injury with red tips, which are classic signs of frost/desiccation damage to foliar tissue. Seeing buds still intact indicates the growth points survived, while the tops of some needles darken or redden, reflecting partial needle injury from winter conditions. Twigs being succulent can accompany the stressed tissue, and when bark shows bleeding cracks, it reveals damage to the underlying cambium from freezing and thawing cycles. The fact that the bole and cambium are dead confirms a serious vascular injury consistent with winter stress, even though the roots remain healthy, showing the problem is above ground. Symptoms may become evident in early summer as new growth unfolds and the prior winter damage is revealed. Other options describe normal growth or different stress patterns that don’t align with the multi-tissue winter injury signs described.