Decay of young seedlings at ground level following fungal attack. Often the result of soil borne diseases and over watering.
The removal of old blossoms to encourage continued blooming or to improve the appearance of the plant. The removal of faded heads of flowers.
The changes that occur as plants grow, die, and break down in the soil.
Plants that shed all their leaves annually, usually in the fall.
Decay. Rot. The breaking down of organic materials into smaller particles until the original material is no longer recognizable.
DECOMPOSE / DECOMPOSITION
To break down into component parts or basic elements; decomposition of organic materials by bacteria is an essential life process because it makes essential nutrients available for use by plants and animals.
Loss of forest, usually as the result of clearing for agricultural (especially for cattle grazing) or other land uses such as roads and buildings. Deforestation destroys what may be an important sink for excess CO2 in the atmosphere.
A measure of the demand for heating ("heating degree-days") or cooling heating ("cooling degree-days") in a geographical location, expressed as degree-days per year to a base temperature. One degree-day means that the temperature needed to be changed by an average of 24 degree-hours during the year.
Macroorganisms that eat decaying matter. Includes ant, beetle, centipede, cricket, earthworm, earwig, enchytraeid worm, millipede, mite, scorpion, slug, snail, spider, springtail, termite, woodlice.
One of the two principal sugars found in honey; forms crystals during granulation. Also known as glucose.
Dehydration or loss of water.
These are plants that loose their leaves at the end of the growing season. Maple trees are a good example.
Trailing stems on the ground with lateral shoots upright
The loss of leaves such as premature summer leaf drop.
A stick or tool that makes planting holes in the soil or media
Death of shoot tips such as by winter cold or chemical damage
Having two set of chromosomes - normal for most species.
Germination of seed in their final spot as opposed to a nursery.
The processing of removing extra buds to promote larger flowers.
A plant which bears either male or female flowers. (Compare to Monoecious)
The flat central part of a compound flower. It is made up of short, tubular florets.
Cut or lacerated into segments - said of fringed petals or leaves.
Pure water free from dissolved salts. Formerly made by distillation, now produced chemically by demineralisation.
A method of propagating plants by separating each one into two or more sections and then repotting.
DIVISION BOARD FEEDER
A wooden or plastic compartment which is hung in a bee hive like a frame and contains sugar syrup to feed bees.
Sometimes used when 'liming' soil that has an acid pH level that is too high. As it contains calcium and magnesium carbonate it should be used only with soils that are also deficient in magnesium as well.
DORMANT PERIOD (DORMANCY)
A state of suspended growth. A state of rest and reduced metabolic activity in which plant tissues remain alive but do not grow.
The Latin name for this is "flore pleno." It refers to flowers that have many petals present, such as roses.
An American term for placing a potted plant in a larger pot with damp peat moss surrounding it. The peat is kept moist and provides a humid evaporative effect for the potted plant nestled between it.
Oil sprayed on deciduous trees while they are dormant. Dormant oils are used to kill overwintering insects or insect eggs on plant bark.
Relating to the back or outer portion of a plant part.
Soil bed preparation done by 2 or more spading sessions.
Said of Narcissus bulbs with two growing apices or 'noses'.
A wooden frame, 1/2 to 3/4 inch thick, with two layers of wire screen to separate two colonies within the same hive, one above the other. An entrance is cut on the upper side and placed to the rear of the hive for the upper colony.
Excessively tall and weak growth, caused by plants being grown in too little light or too closely together.
Watering plants by small droplets over a long period of time each day
The line that marks the outer edge to which a tree's (or other plant's) branches spread. The drip line usually signals a change in microclimate, where the area under the tree, which sees less precipitation, sunlight, and wind and may also be subject to competition from the tree's roots, meets an area that isn't sheltered by the tree.
Combs with cells built out by honey bees from a sheet of foundation.
DRIFTING OF BEES
The failure of bees to return to their own hive in an apiary containing many colonies. Young bees tend to drift more than older bees, and bees from small colonies tend to drift into larger colonies.
The male honey bee.
Comb measuring about four cells per linear inch that is used for drone rearing and honey storage.
An infertile or unmated laying queen.
Pounding on the sides of a hive to make the bees ascend into another hive placed over it.
Varieties bred togrow smaller than their parent plants. Dwarf plants may lose the ability of the parents to set fruit (Bailey's dwarf highbush cranberry, Viburnum trilobum 'Bailey's Compact'). They may not resemble miniatures of their parents (dwarf Alberta spruce, Picea glauca var. albertiana 'Conica').
The rapid dying off of old bees in the spring; sometimes called spring dwindling or disappearing disease.
An abnormal condition of adult bees characterized by severe diarrhea and usually caused by starvation, low-quality food, moist surroundings, or nosema infection.