All types of plants can be attacked by disease so that a knowledge of the early signs of infection and of the way in which a disease can be combated is valuable.
New varieties of plants are being produced all the time by various methods of selection and inbreeding. Highly bred plants are, however, not necessarily highly resistant to disease.
Where one particular type of plant is grown in quantity, often on the same ground year after year, an outbreak of disease can cause serious losses. This trouble is more likely to arise in glasshouses and probably in flower beds that are replanted each year with the same or similar types of plants. Treatment of the soil in early spring or late autumn when the site is vacant will often be necessary.
The term "plant disease" refers to anything - except insect damage - which may check the growth of a plant, cause abnormal growth or death. Included, therefore, are parasitic organisms, unsuitable soil, incorrect temperature, injury from fumes and sprays or excessive liming. Fruits and vegetables - such as apples, pears, potatoes and carrots-continue to live even when stored and can suffer from various troubles which either reduce their food value or destroy them entirely.
Plant diseases may be divided into two main groups: non-parasitic diseases, which are not infectious and parasitic diseases, which are infectious. The latter may be subdivided into two classes: fungous and bacterial diseases; virus diseases.
Related Articles |
|
Parasitic fungi are mostly microscopic. They invade higher plants , Gardening Resources and grow , The White Fringed Weevil in their tissues (cells), which they kill and then absorb the contents formore... ... |
|
|
Bacteria which attack plants , How to Re-laminate Your Kitchen Benchtop are much smaller than parasitic fungi but infect in a similar manner by living in, and killing, the tissues. Somemore... ... |
|
|
With virus diseases, , Lawn Sods - Instant Lawn the exact identification of the parasite is difficult. Viruses are so small that they cannot be seen through the ordinarymore... ... |
|
 |
Lawn Sprigging -
Sprigs are young rooted shoots , pieces of stolon with leaves and roots , Weed Control Methods attached. Lawns , Fruit Fly of subtropical grasses , Medicinal Tea - Catnip â€ââ...
Garden Tillers -
Garden tillers can make life very easy if you have access to one. If you are considering buying a tiller, what kind of best suits your needs? Models come in both small and large sizes. What you should buy depends on ......
Roses -
The Rose , Cleaning your Plants is deservedly the most prized of garden , What is a Ground Cover? plants. It is of easy culture and suited to a wide variety of soils, , Prinicples of a Japanese Garden with exquisitely shaped, often fragrant and delightfully coloured blooms, which continue flowering , PLanting Bulbs over a long period.
Fossil remains in...
Landscaping on sloping Ground -
The treatment of sloping land will depend mainly on the steepness of the slope. When the slope is very steep there is a tendency for soil , Winter Bulbs erosion to take place , The Cherry Aphid once the original vegetation is removed. To prevent this, plant , Gardening Resources species that "hold" the soil , Garden Roses an...
Summer Bulbs -
Some well-known bulbs , Houseplant Drainage for summer , Roses include a few varieties of Gladioli, tuberous Begonia and Montbretia. If you want to try something less familiar, look for Brodiaea uniflora (profuse, neat flowers , Garden Feng Shui on 6 inch stems, which remain in bloom a long time and sme...
Seed Raising and Drainage -
It is very important to provide good drainage. Fill the seed-pots to one-quarter of their capacity with clean broken clay pots, , Planning a Japanese Garden called crocks, and give seed-boxes or pans a good layer of these crocks over the drainage holesââââ...
How To Transplant Seedlings -
Weather conditions at the time of transplanting are important in successful establishment of plants, , Growing Orchids and transplanting should not be done in the middle of the day or in hot , Annulas in Planters spells. The best time for transplanting is late afternoon. Before starting, make...
Bonsai Trees -
Many types of tree , The Black Peach Aphid not usually regarded as appropriate can be successfully grown in miniature form, so if you see anything that looks suitable it is worth attempting to grow , ing Jerulsalem Artichokes it. But first find out as much as possible about the habits and soil , Tree and Shrub Propagation preferences...
Planning a Japanese Garden -
Before beginning a Japanese garden, , Codling Moth look carefully at any made in your district or articles on this subject and study pictures of well-designed Japanese examples. So far as possible, the plants , Pantone Color Swatches used should be native Japanese kinds, and the soil , Climbing Roses should be...
|
|
|
| |
|