01/28/82 Agenda & Packet - Laserfiche WebLink

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CITY OF MOUNDS VIEW 111/1 1981 FORESTRY SUMMARY • Tree losses during 1981 in Mounds View were 144 elms to Dutch elm disease and 169 oaks due to oak wilt. "Chinese" or "Siberian" elms totaled to be 23 ( 16%) of those marked for removal . In addition, 13 elm woodpiles were removed from private land after the woodpile inspection. The total number of elms lost was about 1 .55% of the City's elm population; the oak loss .32% of the total population. Clark landscaping, Mounds View's 1981 tree removal contractor removed 96 or 31% of the marked trees. The average cost per tree removed (before State aid) was $88.25. 11111 Five (5) trenching projects were undertaken by City crews to prevent the spread of oak wilt; all but one on private property. Several other tree diseases were active in Mounds View during the year. Most severe was cedar-apple rust on fruit-bearing apple trees. Apple scap fungus was also damaging to domestic apple trees but more damaging to certain species of flowering crabapples which experienced at least 50% defoliation by August. Verticillium wilt, a major vascular fungus , was confirmed several times on red maple. These trees will continue their decline and probably die within a few years. Happily reported is that the only alleged quince tree in Minnesota survived the year free from disease and insects and continues to be a fine example of what is possible in the urban forest of the future. Insect damage was also heavier than usual in 1981 . Springtime found massive defoliation of oaks and other ornamentals in the north residential part of the City. This was due mainly to the feeding activities of the linden looper, a one inch 111/1 fellow-striped larva of a moth. Both spring and fall cankerworms were, in part, responsible for some shade tree defoliation. The only other insect of any consequence