By Dave Meadows

As previously discussed in Part 1, we understand that most tree pests and diseases problems are usually caused by a single, underlying, primary problem. They are usually tree specific, and can be quite complex to diagnose. 

Another common pest associated with Elder Bug (Boisea trivittata) or also seen this bug on Lombardy with local Manitoba Maple trees is the Box ‘Stink bug’ as some local folks call it. I have Poplars in town. 

This tree pest can be seen all over town in early fall, on your car windows and in your homes. It tries to overwinter in your fire wood piles, eavestrough, window sills and roof shingles. There can be several generations per season, and this bug can be found in all stages of development all at once on one tree host. 

Young nymphs can use maple seeds to relocate to new host trees by clinging on to the seed, using the wind to blow the seed off to new areas. However, these bugs are surprisingly easy to irradicate with just a contact spray of dish soap and water 

Armillaria Root Rot (Armillaria Mellea) is becoming a serious fungal disease problem in the Columbia Valley area, particularly in the Fairmont and Westside areas, where remnant natural forests of mixed Douglas Fir, White Spruce and Lodgepole Pine have been left standing among rural developments. 

This infection begins when the fungus, living in the ground or from infected stumps, sends out filaments that invade healthy roots. It then moves to the root collar, spreads to the tree trunk. Visible signs can vary from decline in tree vigour, foliage yellowing, followed by gradual browning. Needles on pine trees first turn yellow-green and then red before falling off. Spruce needles often become a dull green (but not red) before they fall off. 

Armillaria is only easily detected in mid-summer when the honey-colored, mushrooms or fruiting bodies, appear at the base of the tree. One way of quickly confirming that the mushrooms are indeed Armillaria is to look at the mushroom stem. The telltale sign is the flange or “ring” around the midpoint of the stem. 

Early detection followed by prompt tree removal, including the infected stump, is the only preventative method to discourage this prolific disease. Calling a qualified arborist to confirm a diagnosis and provide treatment services is strongly advised.