![]() ![]() Stain, decay, and honeycomb pits are diagnostic characteristics that can be used to identify the presence of tomentosus root rot on stump surfaces or uprooted trees in the absence of fruiting bodies (Figures 6 and 9). The cross-section of infected roots has a characteristic honeycombed appearance (Figure 5). The pitted decayed wood may be intermingled with areas of red-brown firm wood (Figure 4). ![]() Wood with advanced decay contains elongated spindle shaped pits, typically 1/4 to 1/2 inch in length, which may be empty or filled with white tissue. The early stage of root decay is characterized by a red-brown to pink stain in the heartwood of infected roots. The lower surface is cream to yellow-brown while the upper surface is tan to yellow-brown with a velvety or hairy texture (Figures 2 and 3). Conks develop on the ground, arising from infected roots around diseased trees, and can be easily overlooked.Ĭonks are leathery, small (1 to 4 inches in diameter), round to oval, stalked, and have pores rather than gills on the underside that continue part way down the stem (Figure 2). Fruiting bodies or conks are produced annually in the fall after periods of wet weather. ![]()
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