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International Society of Arboriculture

International Society of Arboriculture
Come to Milwaukee, WI with us! Registration is now open for the 2014 ISA Annual International Conference. There is something for everyone, join us for the International Tree Climbing Championship, Tree Academy Workshops, Opening Ceremony, Welcome Reception, Educational Sessions, Trade Show, and Professional Affiliates Day. Thanks to our generous sponsors this will be an event you can’t miss! Start planning your trip today and experience Milwaukee for yourself.

http://www.isa-arbor.com/

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Researchers confirm age of Methuselah tree By Ari Rabinovitch JERUSALEM Thu Jun 12, 2008 9:19pm BST JERUSALEM (Reuters) - Israeli researchers who grew a sapling from a date seed found at the ancient fortress Masada said on Thursday the seed was about 2,000 years old and may help restore a species of biblical trees. Carbon dating confirmed that the seed -- named Methuselah after the oldest person in the bible -- was the oldest ever brought back to life, Sarah Sallon, a researcher at the Hadassah Medical Centre in Jerusalem, reported in the journal Science. The seed came from the Judean date palm, a species that once flourished in the Jordan River Valley and has been extinct for centuries, Sallon said. It was one of a group discovered at Masada, a winter palace overlooking the Dead Sea built by King Herod in the 1st century BC.

Tree Disease identification, symptoms, treatment options for tree diseases There are many different diseases that affect landscape trees and shrubs. Control of tree and shrub diseases cannot be properly accomplished until the disease pest is identified. Identification of tree and shrub diseases is crucial because, although most diseases can be controlled, there are some diseases that cannot be controlled. Disease control on landscape trees and shrubs can sometimes be accomplished by more than one method, depending on the particular disease that if infecting your landscape plants. Tree Encyclopedia Trees have three principle features that distinguish them from all other plants. First, they have a woody stem, roots and branches which do not die back in winter, but continue to grow year after year. From the moment of its germination, a tree remains visible; from the tallest Sequoia to the smallest garden fruit tree, this principle of growth remains constant.

Fruit Identification Outline a. Achene: Very small, one-seeded fruit, usually produced in clusters. At maturity the pericarp is dry and free from the internal seed, except at the placental attachment. This is the typical fruit of the largest plant family, the sunflower family (Compositae or Asteraceae). Examples of this type of fruit include the sunflower (Helianthus), buttercup (Ranunculus) and sycamore (Platanus). In the sycamore, the globose fruiting heads are composed of tiny, one-seeded achenes interspersed with hairs (some authors refer to these individual fruits as nutlets). Drupe The development sequence of a typical drupe, a smooth-skinned (nectarine) type of peach (Prunus persica) over a 7 1⁄2 month period, from bud formation in early winter to fruit ripening in midsummer Other fleshy fruits may have a stony enclosure that comes from the seed coat surrounding the seed, but such fruits are not drupes. Some flowering plants that produce drupes are coffee, jujube, mango, olive, most palms (including date, coconut and oil palms), pistachio, white sapote, and all members of the genus Prunus, including the almond (in which the mesocarp is somewhat leathery), apricot, cherry, damson, nectarine, peach, and plum. Terminology[edit] The term stone fruit (also stonefruit) can be a synonym for drupe or, more typically, it can mean just the fruit of the Prunus genus. Freestone refers to a drupe having a stone which can be removed from the flesh with ease.

Global Justice Ecology Project: GlobalJusticeEcology.org , Hinesburg, VT Israeli biotech firm says its modified eucalyptus trees can displace the fossil fuel industry by John Vidal, environment editor, The Guardian, Thursday 15 November 2012 GM eucalyptus trees at five-and-a-half years old, grown in a field trial. FutureGene claims GM species grow thicker and faster than the natural plant, making it possible to be grown for energy generation.It's a timber company's dream but a horrific industrial vision for others: massive plantations of densely planted GM eucalyptus trees stretching across Brazil, South Africa, Indonesia and China, engineered to grow 40% faster for use as paper, as pellets for power stations and as fuel for cars. The prospect is close, says Stanley Hirsch, chief executive of the Israeli biotech company FuturaGene. All that is missing, he says, are permissions from governments for the trees to be grown commercially, and backing from conservation groups and certification bodies.

Practical Plants Polycultures, Guilds & Companions... In addition to each plant being able to record interactions with other individual plants, users can also create polycultures or guilds of known plant combinations that work well together. We are at the very start of our collection of polycultures with The Three Sisters set up as a quick example. You can create your own favourite polycultures here: An open encyclopedia of plant information There are plenty of sources of plant information online.

Rainforest In Brazil, which houses 30 percent of the remaining tropical rain forest on Earth, more than 50,000 square miles of rain forest were lost to deforestation between 2000 and 2005. Biologists worry about the long-term consequences. Drought may be one. Some rain forests, including the Amazon, began experiencing drought in the 1990s, possibly due to deforestation and global warming. The extinct tree which has resurrected from ancient seeds For thousands of years, the date palm was a staple crop in the Kingdom of Judea, as it was a source of food, shelter and shade. Thick forests of the palms towering up to 80 feet and spreading for 7 miles covered the Jordan River valley from the Sea of Galilee in the north to the shores of the Dead Sea in the south. So valued was the tree that it became a recognized as a symbol of good fortune in Judea.

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