Posts Tagged Landscape

Tips for Choosing the Best Greenhouse Lighting

Posted on Friday, March 13th, 2009 at 9:56 am

If you’re just starting out with a greenhouse, it’s important that you make the right choices in lighting. Proper lighting is crucial in order for a plant to flourish. Proper lighting will go a long way towards making sure that your plants thrive. If you need some help figuring out your best options in greenhouse lighting, here are some tips that will help you make the right choice.

1. The first thing you need to do is figure out the amount of light you will require. The factors you need to consider are the type of plants you’re going to raise, and the size of your greenhouse. Tall plants, fruit and flowers need more light than other plants. An outdoor greenhouse will typically use 25 watts per square foot. However, indoor greenhouses require at least twice as much light.

2. The type of light you choose must be appropriate for the kind of plants you’re raising. Something that impacts plant growth to a great extent is the kind of light waves that are given off. For instance, if you want optimal growth for fruit or flowers, use high pressure sodium lights. The light from these lamps is in the red spectrum, and stimulates the plants’ growth hormones. Metal halide lights utilize the blue spectrum and are best suited to leafy plants.

3. The lighting system shouldn’t be too hot for your plants to handle. Too much heat can kill them. Some lights release a lot of heat when they’re running. Incandescent lights, for example, produce large quantities of heat. They’re not a great option anyway, because the light they give off isn’t enough for most plants to thrive. However, fluorescent grow lights give off a lot less heat. Make sure you compare how much heat each lighting option produces before making your purchase.

4. Choose lighting products that will give you the results you need without using a lot of energy to power them. The most energy efficient greenhouse lights you can buy are known as high intensity discharge. Unfortunately, they’re also the most expensive to purchase. LCD grow lamps are rapidly gaining in popularity because of their energy efficiency. They also produce lower levels of heat.

No matter what kind of indoor greenhouse lighting you decide on, it’s essential that you turn it off from time to time. Lighting should only be used where and when it is needed. Plants need darkness, too, in order to grow properly. Leave the lights off for 6 to 12 hours each day in your garden greenhouse, depending on what kind of plants you have.

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Why Use Landscape Lighting?

Posted on Friday, March 13th, 2009 at 8:00 am

If you want to have a beautiful garden, you should consider all of the design elements. Dont just look at shrubs, flowers, and trees. Consider garden structures like trellises and gazebos, and of course landscape lighting. Outdoor lighting, including garden path lighting, has become very popular with gardeners. It enhances the natural beauty of your garden, allowing you to enjoy your hard work long after dusk. Plus, garden path lighting is a useful safety feature for your yard.

Many people choose solar garden lights to use as garden path lighting. While electrical lighting can also be used, it required digging into your yard, making it a much more permanent addition to the landscape. To use solar lighting, just place a AA battery into your landscape lights. Natural sunlight will keep the lights charged, and they will automatically turn on at dusk and off at dawn. OF course, make sure they are placed where they will receive some sunlight during the day.

When youre purchasing garden path lighting, you should carefully consider the style of lighting you wish to use. Your choices include dome lights that are close to the ground, pole lighting, globes, lanterns, or stepping stones. The most commonly used garden path lights are attached to a spike or pole, which you simply push into the ground. When using solar lighting, thats all there is to installing garden path lighting.

Most of the garden path lighting currently available is made from durable plastic, copper, or stainless steel. You can find many different types of lighting, including those with colored bulbs or panels for a uniquely colored light. Others have a more traditional soft white or yellow glow.

If you have a water feature, like a fountain or pond, consider solar balls. These can be allowed to free float on the water, and come in a wide range of colors. These make a fun and unique addition to your yard.

Solar floats are another new idea for landscape lighting. They are disc-shaped, and can be placed on an outdoor table, along a pathway, or in a swimming pool or pond. They slowly change color, adding an interesting feature in the darkness. Solar flowers are similar to solar lights or solar floats, except that they are made out of fiber optics in the shape of various garden flowers. Attached to a spike, they are easily inserted into the ground to provide an unexpected spot of light and color during the night in your garden.

Solar stepping stones are a great way to light a garden path. They come in many shapes, sizes, and colors, to suit any garden. They have amber LED lights built in to provide a bright glow along your pathway.

Garden lights are available in many unique styles and colors. They are both beautiful and functional.

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Death Cap Mushroom

Posted on Wednesday, March 11th, 2009 at 1:51 pm

The most deadly poisonous fungi are two types of Death Cap called Amanita phalloides and its albino form A. phalloides ssp. verna. Their caps are white or various shades of green, their cuticle does not usually exhibit any remnants of a veil whilst , their stipe, which widens at the base, is encased in a tall, membranous, white volva.

Experiments have proved that although high temperatures lessen the virulence of the poison, they do not destroy the toxic substances. Finally the character of the Death Cap arises during which the poison fully penetrates the blood stream so that any late stomach-pumping is ineffective.

Phalloidin attacks the liver cells and acts very quickly; in fact, within 15 minutes it can cause cellular changes. A fatal dose is about 1 milligram to each kilogram of’, the body-weight of a human being.

The important breakthrough came in 1959, when Dr. J. Herink from Prague advocated the administration of an octathionic (thiooktic) acid preparation, used as a cure for some liver diseases. Immediately I ‘tree patients who had consumed Death Cap were saved.

After this treatment, using preparations of octathionic acid, was developed so that currently it is possible to cure all cases of poisoning by Death Cap, providing the nature of the poisoning quickly established and the recognized procedures are employed.

The number of cases of poisoning caused by this Amanita has multiplied in recent years due to an increase in the collection of the Blusher mushroom (A. rubescens) and also occasionally that of A. spissa..

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Fungus Fruit Body

Posted on Tuesday, March 10th, 2009 at 7:44 am

The term fungus does not only encompass the large, often colorful and striking fruit-bodies of the fleshy, edible or poisonous mushrooms found in woods, but it also incorporates a large group of inconspicuous microscopic organisms, such as molds and yeast-fungi.

These hyphae can penetrate various types of material ranging from a woodland humus and rotting wood to the tissues. In some fungi the mycelium develops into a mass of thin or thick roots, threads or even thick cords. The mycelium obtains nutrients from decomposing organic matter.

The growth of fruit-bodies is influenced by internal and external preconditions and the rate of growth differs from one species to another. The fruit-bodies of Ink Caps (Coprinus species) develop very quickly indeed, taking only a few hours to reach maturity, but they do not survive for very long. Slow-growing species include the fruit-bodies of the Polyporaceac family, which are perennial species. Their fruit. bodies produce annually one additional fertile layer and it is not unknown for some of these fungi to live for scores of years.

The life of mycelia varies considerably; some last one to two years, others for several years. The mycelia of mycorrhizal fungi; which live in symbiosis with the roots of green plants, usually last as long as the host plants.

In Gill fungi and Boleti (Agaricales) it consists of gills or tubes, while in Tooth fungi (Hydnaccae) the lower surface of the cap is covered with teeth or spines. The underside is covered by a fertile layer (hymenium) of spore-bearing projections, called basidia, which produce spores. In the Cup fungus this fertile layer forms the inner lining of the cup, whereas in such fungi as the Morels and the Staghorn fungus it covers the whole or part of the outside of the irregular fruit-body.

The discipline which deals with the study of flingi is called mycology. Its importance is growing, due to further basic research in this field. Its influence extends into many other economically important pursuits, such as production of food, pharmacology and medicine.

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Helvella elastica

Posted on Tuesday, March 10th, 2009 at 4:55 am

Polypore is one of the most damaging but also prevalent members of this extensive family and lives on old trunks of fruit trees. Its fruit-bodies are juicy, meaty, heavy and very watery.

When moist its folded, brain-like, contorted fruit-bodies become bright yellow in colour. Exidia Nana is even more common; it differs from other species of the Exidia genus by the presence of dark protrusions which are scattered over the surface of its blackish fruit- body. When dried out, it becomes narrow, black and shrivelled. Generally it grows on the cut surfaces of beech stumps and also on the branches and trunks of other trees lying on the ground. The Jew’s Ear is edible, but Tremella and Exidia are not.

This Polypore is one of the most damaging but also prevalent members of this extensive family and lives on old trunks of fruit trees. Its fruit-bodies are juicy, meaty, heavy and very watery.

The stumps of various tree species provide a habitat for this very extensive group of fungi. Many.of them are minute, even microscopic, and so easily escape human attention, while others are striking in size, shape and colouring. One of the most abundant species is Calocera viscosa.

Inonotus hispidus is an annual fungus which attacks orchards with apple and occasionally pear trees, causing great damage. It prefers older trees as their central wooden column rots quickly.

In the past a yellow dye has been produced from its fruit bodies, used for painting and silk dying. In favourable conditions this fungus grows very fast, reaching a large size and weight, which can amount to as much as 5 kg when fresh. It is inedible.

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The Damage Caused by Fungi

Posted on Tuesday, March 10th, 2009 at 2:54 am

Apart from bacteria, viruses and insects, most damage is cause by microscopic fungi, such as rust, blight and mould. These moulds lead to a general wasting of seedlings and also precipitate dangerous diseases in potato plants and vines.

Blight specifically attacks wheat and some dust blight can destroy whole ears of corn and transform them into a mass of black spores; on the other hand, hard blight leaves corn ears alone.

Similarly large losses in wheat production have been caused by wheat rust, whilst various types of rust attack other plant species with little regard to their economic importance. Especially harmful is mildew, which forms a white floury film on many plants, such as hops, roses, oak trees and vines. Fruit is also attacked by fungi which cause black or brown rot.

Other species damage the needles of coniferous trees and ultimately make them drop off. aaviceps purpurea is a notorious pest, which also attacks wheat and rye but at the same time provides a vital source of important drugs necessary in the pharmaceutic industry.

Wood fungi, mainly members of the Polyporales order, are also very dangerous; their mycelia penetrate the wood o trees and eventually destroy them. There are also other species which attack trees, the commonest being the Honey fungus (Armillaria mellea), which is one of the most harmful parasites that predominantly infests both forest and garden trees.

The information found in the writings of such early natural scientists as Pliny and Galen shows that other, less common and tasty mushrooms were also eaten.

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Factors Influencing Quality of Pepper

Posted on Tuesday, March 10th, 2009 at 2:32 am

Many of the factors described above in respect of black pepper apply equally to quality control in white-pepper production. However, harvesting is delayed until the fruit is fully ripe and the skin is sufficiently soft for the decortication process. Premature harvesting not only results in decortication problems but also in a shrivelling of the core.

A number of Aspergillus and Penicillium moulds have also been found in these spices but an American study found only low concentrations of aflatoxins. In black pepper, mould contamination has been shown to be essentially restricted to the surface of the spice whereas internal contamination was also found with white pepper.

Pepper which has been adequately cleaned and dried can suffer minimal quality deterioration if stored in dry conditions. In India, the storage period prior to shipment is relatively dry, but in Indonesia and Sarawak it coincides with the rainy season. Consequently, the high humidity in the godowns in these two countries can result in an increase in the moisture content of the spices and greater susceptibility to mould development and insect infestation.

However, problems might be encountered with chemical treatments in regard to toxic residues and aroma/flavour deterioration and that ionizing radiation could possibly photolyse the piperine with a consequent reduction in pungency.

After removal of the bags from the water, the berries are placed in a tank of water and are trampled to remove any remaining adhering pericarp. Excessive pressure should not be used in this operation as it can damage the surface of the cores and result in subsequent volatile-oil loss and aroma/flavour deterioration. Finally, the smooth buff-coloured cores are throughly washed in running water. Sun-drying is carried out on bamboo mats in a similar manner to black pepper with regular raking. The wet, freshly decorticated peppercorns are very susceptible to mould formation, and should the weather be unsuitable for sun-drying, they are stored under water until the weather improves.

Decorticated black pepper is a form of white pepper produced by mechanical decortication of the outer skin of black pepper and it is usually done by pepper grinders in Europe and North America when white pepper is in short supply. The appearance of the decorticated kernel is not as good as traditionally prepared white pepper, but it is satisfactory when ground. The aroma and flavour of the product is rather weak and is more reminiscent of black pepper than traditional white pepper. The milling operation requires considerable skill since excessive volatile-oil losses can occur if too much tissue is stripped off the surface of the kernel. The suitability of the various types of black pepper on the market for this decortication operation differs considerably according to the toughness of the outer skins.

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Drying Pepper

Posted on Tuesday, March 10th, 2009 at 12:34 am

Black pepper is produced from whole, unripe but fully developed berries. Chinese producers in Indonesia and Sarawak have advocated harvesting when the green berries commence to acquire a yellow coloration but other growers, including those in India, frequently delay harvesting to a somewhat more advanced stage of colour development.

With regard to the influence of harvesting and preparation methods on these chemical quality aspects, the most important factor is the stage of maturity of the berries at harvest.

The volatile-oil content of immature green pepper reaches a maximum at a relatively early stage, about four and a half months after fruit setting for some varieties in India, and then diminishes while the piperine content continues to increase for a period. Thus, the suitability of the final product for particular end-uses is governed to a large extent by the stage of maturity of the berries at harvesting.

The initial appearance, the level of micro-organisms and mould contamination and the susceptibility to insect infestation are dependent upon the care taken during the drying and preparation of the spice. Mould formation can be a considerable problem during the drying and subsequent storage of black pepper and it is imperative to dry the berries as quickly as possible to a safe moisture content (11 per cent or less).

In India, Indonesia and Sarawak, pepper production is predominantly a small-holder’s crop and the final cleaning, grading and bagging of the dried spice is carried out by exporting firms. Debris and light (immature) berries are removed by garbling, which involves the use of winnowing machines or wide-mesh sieves. If the black pepper is noticeably contaminated by mould and/or insects, it may be washed and re-dried in the sun. Grading is normally done according to overseas buyers’ requirements, and double-lined gunny bags are used for packing. In Asian producing countries, the bagged pepper is usually stored in godowns prior to shipment.

In Indonesia and Sri Lanka, blanching of the berry clusters in boiling water for about ten minutes prior to sun-drying is a common practice. This operation accelerates both the browning and the rate of drying. Prolonged blanching should be avoided since this can deactivate the enzymes responsible for the browning reaction.

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Value of Fungi

Posted on Monday, March 9th, 2009 at 10:37 pm

The decision as to which mushroom should be considered the tastiest and best for cooking is in the final analysis a question of your personal choice.

The number of species identified as edible in the past remained very small for a long time without increasing. This was perhaps due to the fact that edible mushrooms usually grow in the same localities as almost identical poisonous fungi and therefore their lack of popularity often belied their quality.

However, the number of mushroom species which can be sold on the open market is dependent on the approval and recognition. In Europe, this number of mounts to about 70 edible species. These include all the good the mushrooms which .grow in European forests; all can he freely sold with the exception of Russula species, which can be confused with some poisonous species and as a result it has been deemed inadvisable to allow them to be offered for sale.

Some of these edible mushrooms can be cultivated. The best known are Truffles, which are grown in oak trees on a calcareous soil in the warns regions of southern France. Other mushrooms whose popularity has increased during the last few decades are Field mushrooms.

Many centuries elapsed and the views of the majority of people visa vis the value of certain edible species still remained quite conservative, particularly in some European countries. However, the number and popularity of edible species have subsequently increased in some countries, where picking mushrooms has become a sport and a hobby and sometimes even a time- consuming passion.

To do this, dead wood in the shape of a stump or a part of a tree trunk which has become infested with the mycelia of the fungi is usually transferred to a suitable place in the garden or a cellar and kept moist by regular watering in order to maintain the fertility of the mycelia.

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Peziza badioconfusa

Posted on Monday, March 9th, 2009 at 10:00 pm

This Polypore is one of the most damaging but also prevalent members of this extensive family and lives on old trunks of fruit trees. Its fruit-bodies are juicy, meaty, heavY and very watery.

Peziza badioconfusa grows on bare, slightly damp ground close to woodland paths and streams. Its fruit-bodies are wide and cup:shaped and, when mature, if they are touched discharge clouds of whitish spore powder. This phenomenon is also characteristic of other related genera. A similar species, Peziza badia, is a deeper reddish-brown and the ornamentation of its spores is also different.

Inonotus hispidus is an annual fungus which attacks orchards with apple and occasionally pear trees, causing great damage. It prefers older trees as their central wooden column rots quickly. In the past a yellow dye has been produced from its fruit:- bodies, used for painting and silk dying.

The Jew’s Ear likes to grow on the common elder and on false acacia. Its very supple fruit-bodies are bone hard when dry, but become pliable again when moistened. Some related species which grow in Asia arc used in cooking. Tremella mesenterica is often found on the dead branches of deciduous trees, usually hornbeams and oaks.

Helvetia acetabulum has deep, cup-shaped fruit- bodies which open gradually. Its prominent ribs, located on a relatively short stipe, branch out to the underside margins of its cup-shaped cap.

When dried out, it becomes narrow, black and shrivelled. Generally it grows on the cut surfaces of beech stumps and also on the branches and trunks of other trees lying on the ground. The Jew’s Ear is edible, but Tremella and Exidia are not.

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