Slash pine5/11/2023 Very susceptible to fusiform rust in USDA hardiness zones 8 through 10. Mites cause older needles to turn yellow. Spruce mites cause damage to older needles, and are usually active in the spring and fall. Pine spittle bug lives and hides in a foamy mass. Depending on the scale, horticultural oil may control overwintering stages. Pine tortoise scale is brown and found on twigs. Pine needle scale is a white, elongated scale found on the needles. Pine needle miner larvae feed on the inside of needles causing them to turn yellow and dry up. Sawflies can cause rapid defoliation of branches if left unchecked. Some sawfly larvae will flex or rear back in unison when disturbed. Sawfly larvae are variously colored but generally feed in groups on the needles. Tip moth damages trees in parts of its range. These include the IPS beetle, the turpentine beetle and the southern Pine beetle. It could make a wonderful street tree, if set back from the roadway.īark beetles and wood borers can be a serious problem on trees impacted by construction. It grows slower than the species, reaching about 40 feet tall with a rounded crown in 30-years. Development continues to remove these but nurseries are growing it to be replanted in the landscape in USDA hardiness zones 9, 10, and 11. densa, the famous "Dade County Pine" of hardwood fame, extends from the Florida Keys up into central Florida. Pine is the state tree of Arkansas, North Carolina, and Alabama. The root zone on trees extends to about three times the dripline. The problem is probably best prevented by eliminating turf from beneath the canopy and withholding high pH irrigation from the root zone. These are probably temporary solutions to a problem which is caused by a complex of activities, including root injury and removal during construction, over-fertilization, and application of high pH irrigation water. Landscape managers have applied fertilizers to the root zone and foliage and, more recently, directly into the trunk through injection tubes. Symptoms appear as micronutrient deficiencies (iron and manganese). Pines gradually turn yellow and begin dying soon after construction activities have begun, or when high pH irrigation water is applied regularly to the root zone. Probably the most serious problem of pines in areas with high pH irrigation water is pine chlorosis. Needles will need to be regularly raked from the lawn in refined landscapes. Needles seem to fall from the tree all during the year creating slippery walks. It is also used as a screen although it is quite unsuited for this purpose because lower branches are not retained in the tree and it grows with an open form. This native plant is becoming more popular as a landscape plant and is often planted in groups to create a natural-like setting. Open-grown trees keep more lower branches, probably due to greater sun exposure. Since shaded lower branches die and drop as the tree grows taller be careful not to plant them too close to high traffic areas where branches could fall on people or vehicles, unless there is a regular maintenance plan to remove them. Trunks which break in hurricanes break several feet up from the ground. The horizontal branches break easily in ice storms. It is not highly drought-tolerant but more so than most other pines. Once established, it is more tolerant of wet sites than most other pines and is moderately salt-tolerant. It does poorly in basic soil (high pH) and so is not recommended for soils with high pH, or where irrigation water has a high pH. Slash Ppne grows well on a variety of acidic soils in full sun or partial shade. The tap root is prominent in well-drained soil and can make them difficult to transplant from the wild. Pines have some deep roots except in poorly-drained soil where all roots are shallow. Aggressive root competition takes place beneath pines so the shrubs and lawn beneath and around the canopy often require more frequent irrigation, particularly during the dry season. This allows just enough sun to filter through for maintenance of a lawn beneath this tall, evergreen tree or for underplanting's of dogwoods, azaleas, camellias and other plants which thrive in this high, shifting shade. Slash pine is self-pruning of its lower branches, is somewhat pyramidal when young and forms an open, rounded canopy creating a light, dappled shade beneath. Pest resistance: sensitive to pests/diseases Use and Management Verticillium wilt susceptibility: resistant Soil tolerances: clay sand loam acidic slightly alkaline well-drained to occasionally wet Light requirement: full sun to partial shade Bark - Pinus elliottii: slash pine Credit: Gitta Hasing, UF/IFAS Culture
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