![]() ![]() Trees should be pruned after planting to remove broken, damaged, diseased or dead branches.Start the mulch 6 inches away from the tree trunk. Mulch the planting area with 2 to 4 inches of an organic, composted mulch such as wood chips. ![]() Backfill with soil from the planting hole, using water to pack or settle the soil around the root ball.The tree should be planted so that the root flare, the base of the tree trunk where the roots begin to "flare-out," will be visible above grade. Set the tree on undisturbed solid ground in the center of the hole.The diameter of the hole should be two to three times the diameter of the root ball or root spread. Dig the hole just deep enough to allow the first structural root to be at level grade.Measure the height and diameter of the root ball or root spread.The most common mistake is planting the root ball too deep."Īndersen advises consumers to follow these planting guidelines: "Using quality plants and following up with good tree care practices, such as watering, pruning and fertilizing, will not save a poorly planted tree. "Proper planting is absolutely essential for the success of a transplanted tree," says Andersen. "Too often, consumers waste hundreds of dollars on trees that will die because they were planted too deep," cautions Tchukki Andersen, BCMA, CTSP* and staff arborist with the Tree Care Industry Association (TCIA). Before doing this, however, homeowners should consider advice from expert arborists to ensure the trees' longevity. Crop Protection 28: 655-661.Arbor Day, an April holiday that celebrates the planting and caring for trees, is a popular time for homeowners to add new trees to their landscapes. Distribution of trunk-injected 14C-imidacloprid in ash trees and effects on emerald ash borer (Coleoptera: Buprestidae) adults. Ash species and water treatment had little effect on A. planipennis were fed leaves from trunk-injected trees, an average of 71% of beetles were killed or intoxicated in 2004 compared with an average of 24% in 2005. This suggests that imidacloprid translocation occurred mainly in the xylem. Samples from outer bark and phloem collected with a cork-borer at 1 m and 2 m above ground line had low levels of imidacloprid as did fine roots. Imidacloprid concentrations in leaves increased steadily throughout the first (2004) growing season, whereas in the year following injection (2005), little imidacloprid was detected in leaves. Imidacloprid concentrations differed ( P30×) than any of the other plant tissues. Imidacloprid concentrations did not vary ( P> 0.05) between tree species or water treatments. Tree trunks, twigs, leaves and roots were sampled periodically for two years following injection. Green ash ( Fraxinus pennsylvanica) and white ash ( Fraxinus americana) trees were injected with 25 ♜i of 14C-imidacloprid plus non-labeled imidacloprid and were grown under water-sufficient and water stress conditions. Efficacy can vary and little is known about the distribution, accumulation and persistence of this compound in trees. Trunk injection of imidacloprid is commonly used to protect landscape ash trees from A. The emerald ash borer (EAB), Agrilus planipennis (Coleoptera: Buprestidae) is a destructive exotic pest of North American ash ( Fraxinus sp.) trees. ![]()
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