07/28/2010 Env Bd Packet - Laserfiche WebLink

Home Search

July 28, 2010 has the lowest out of pocket expense. This plan also causes the greatest losses to aesthetic and ecological value that the Ash trees provided for Lino Lakes. 2. Replace all Ash trees. This option replaces every Ash tree with a new tree that won't get Emerald Ash borer. This plan is the least costly way to manage the Lino Lakes Ash forest and allow it to regain its former size. 3. Treat the Ash trees with insecticide. This plan has the lowest annual out of pocket costs, but it has the greatest cost over time t also produces the largest remaining forest over time. Research demonstr f at insecticides can protect small trees < 12" in diameter until they reac ` nch diameter. Effective treatment of larger trees would require eit m. requent application, or a higher dose of inspective. Research as of 8.2010 s one application of insecticide will treat a tree for at least 3 years. Treating at least the middle range of tree size also gives the CI e to spread our losses over a much greater time period, and possibly eliminate ou ,., es for treated trees. Natural controls with r�< ;. ,� c and predatory insects, genetic section and manipulation, all take time. Th d time to achieve victory in one of these areas is 20 years minimum. Th Ilo,•sts are estimated for the different scenarios of Ash Tree manageme f Lino Lakes. Park Street Trees.. Trees /Boulevards Peltier Island Ash Trees /Nested Num Num Based on Cit Park Remove All City and Par Remove All City and Park Tre Replace All City Park and Street 598 ing a contractor sing City Crews r 5 years using a contractor 157 Replace All City Park and Street Trees over 5 years using City Crews Chemically Treat all City and park Trees indefinitely using a Contractor /year Chemically Treat all City and park Trees indefinitely using City Crews /year Chemically Treat all City and park Trees 6 " -12" indefinitely using a contractor /year Chemically Treat all City and park Trees 6 " -12" indefinitely City Crews Remove All City and Park Trees < 6 and >12 inches using a contractor Remove All City and Park Trees < 6 and >12 inches using City crews Replace All City and Park Trees < 6 and >12 inches using a contractor $282,534 $144,100 $624,965 $246,883 $54,670 $8,529 $27,980 $4,365 $143,505 $35,897 $312,321 !st Year At 25 Years $18,223.00 $2,843.00 $9,326.66 $1,455.00 $2,191,210.00 $341,829.00 $1,123,560.00 $175,275.00 • •