Sun Scald (flora)
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Sun Scald (flora)
Sun scald is the freezing of bark Bark may refer to: * Bark (botany), an outer layer of a woody plant * Bark (sound), a vocalization of some animals Places * Bark, Germany * Bark, Warmian-Masurian Voivodeship, Poland Arts, entertainment, and media * ''Bark'' (Jefferson Airp ... following high temperatures in the winter season, resulting in permanent visible damage to bark. Fruits may also be damaged. In the northern hemisphere, it is also called southwest injury. Causes The reason the sun can cause so much damage to trees is because of dormancy Dormancy is a period in an organism, organism's Biological life cycle, life cycle when growth, development, and (in animals) physical activity are temporarily stopped. This minimizes metabolism, metabolic activity and therefore helps an organism to .... When a tree is dormant in the winter it can be reactivated by warm weather. In the northern woods trees are exposed to the most sunlight and heat on the southwest facing side, so th ...
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Leaf Scorch
Leaf scorch (also called leaf burn, leaf wilt, and sun scorch) is defined as a browning of plant tissues, including leaf margins and tips, and yellowing or darkening of veins which may lead to eventual wilting and abscission of the leaf.


Causes

Leaf scorch can be caused by soil compaction (agriculture), soil compaction, transplant shock, nutrient deficiency, nutrient excess, drought, salt toxicity, herbicide injury, and disease injury.


Treatment

Affected plants may sometimes recover through watering and fertilization (if the cause is not over-fertilization). Light pruning may also help to reduce the water-pumping load on the roots and ...
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Sun Scald On Sitka Spruce
The Sun is the at the center of the . It is a nearly perfect of hot , heated to by reactions in its core, radiating the mainly as , , and radiation. It is by far the most important source of for on . Its diameter is about , or 109 times that of Earth. is about 330,000 times that of Earth, and it accounts for about 99.86% of the total mass of the Solar System. Roughly three quarters of the Sun's consists of (~73%); the rest is mostly (~25%), with much smaller quantities of heavier elements, including , , and . According to its , the Sun is a (G2V). As such, it is informally, and not completely accurately, referred to as a (its light is closer to white than yellow). It formed approximately 4.6 billionAll numbers in this article are . One billion is 109, or 1,000,000,000. years ago from the of matter within a region of a large . Most of this matter gathered in the center, whereas the rest flattened into an orbiting disk that . The central mass became so hot ...
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Bark (botany)
Bark is the outermost layers of stems and root In vascular plant Vascular plants (from Latin ''vasculum'': duct), also known as Tracheophyta (the tracheophytes , from Greek τραχεῖα ἀρτηρία ''trācheia artēria'' 'windpipe' + φυτά ''phutá'' 'plants'), form a large group ...s of woody plant A woody plant is a plant that produces wood as its structural tissue and thus has a hard stem. In cold climates, woody plants further survive winter or dry season The dry season is a yearly period of low rainfall, especially in the tropics ...s. Plants with bark include tree In botany, a tree is a perennial plant with an elongated Plant stem, stem, or trunk (botany), trunk, supporting branches and leaves in most species. In some usages, the definition of a tree may be narrower, including only wood plants with se ...s, woody vine A vine (Latin Latin (, or , ) is a classical language belonging to the Italic languages, Italic branch of the Indo-E ...
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Dormancy
Dormancy is a period in an organism's life cycle Life cycle, life-cycle, or lifecycle may refer to: Science and academia *Biological life cycle, the sequence of life stages that an organism undergoes from birth to reproduction ending with the production of the offspring *Life-cycle hypothesis, ... when growth, development, and (in animals) physical activity are temporarily stopped. This minimizes metabolic activity Metabolism (, from el, μεταβολή ''metabolē'', "change") is the set of life Life is a characteristic that distinguishes physical entities that have biological processes, such as signaling and self-sustaining processes, ... and therefore helps an organism to conserve energy In physics, energy is the physical quantity, quantitative physical property, property that must be #Energy transfer, transferred to a physical body, body or physical system to perform Work (thermodynamics), work on the body, or to heat it. En .... Dormancy tends ...
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Frost Crack
Frost crack or Southwest canker is a form of tree In botany, a tree is a perennial plant with an elongated Plant stem, stem, or trunk (botany), trunk, supporting branches and leaves in most species. In some usages, the definition of a tree may be narrower, including only wood plants with se ... bark damage sometimes found on thin barked trees, visible as vertical fracture Fracture is the separation of an object or material into two or more pieces under the action of stress. The fracture of a solid usually occurs due to the development of certain displacement discontinuity surfaces within the solid. If a displa ...s on the southerly facing surfaces of tree trunks. Frost crack is distinct from sun scald and sun crack and physically differs from normal rough-bark characteristics as seen in mature oaks, pines, Populus, poplars and other tree species. Normal bark formation The sloughing or peeling of the bark is a normal process, especially in the spring when the tree b ...
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